This document summarizes a study of the geomorphology and limnology of 25 freshwater bodies in northern Nigeria that are inhabited by molluscs. A total of 14 mollusc species from 9 families were found across the water bodies. Measurements of the water bodies showed variations in elevation, size, substrate, and vegetation. Water quality parameters like temperature, pH, dissolved oxygen, alkalinity, and hardness also varied significantly between sites. Linear regression analysis revealed relationships between elevation and other factors. Canonical correspondence analysis established relationships between mollusc distributions and environmental characteristics. The study provides information on the habitats and water quality conditions of mollusc-inhabited freshwaters in northern Nigeria.
FLORAL DIVERSITY OF MANGROVE ECOSYSTEM FROM COASTAL ENVIRONMENT OF URAN (RAIG...Prabhakar Pawar
Mangrove forests are among the world’s most productive ecosystems and are the only forests situated at the confluence of land and sea in tropical and subtropical latitudes.Mangroves are one of the biologically diverse ecosystems in the world, rich in organic matter and nutrients and support very large biomass of flora and fauna. With continuing degradation and destruction ofmangroves, there is a critical need to understand the biodiversity of the mangrove ecosystems.Mangroves represent spirit of Mumbai and NaviMumbai - they are plucky survivors. Each day, millions of citizens in Mumbai pass these hardy plants imaging they are little more than dirty, muddy weeds growing pointlessly along the shoreline. Overexploitation and unsustainable demand has resulted in considerable degradation of mangrove areas and it is feared that the area under mangroves around Mumbai areas has dwindled by 35% in the last 25 years and only about 20 Km2 of mangroves exist today. During this study, 4 species of true
mangroves representing 3 genera and 3 families, 10 species of mangrove associates belonging to 8 genera and 6 families and 1 species of non-mangrove halophytes were recorded from the mangrove ecosystems of Uran (Raigad), Navi Mumbai,Maharashtra.At present, coastal environment of Uran shows moderate mangrove density but in coming few years, area around Uran coast will be dominated by intense industrialization and urbanization. In such circumstances, pollution of Uran coast cannot be ignored. Therefore, data presented in this paper can be taken as a base line data for better management of these natural resources.
Key words: Mangroves diversity, Uran, Navi Mumbai,Maharashtra
Seasonal Variations and Diversity of Marine Diatoms of Jegathapattinam and Ka...IJSRD
The present study entitled on Seasonal variations and diversity of plantonic marine diatoms of Jegathapattinam (Lat. 09º 95 N: Long. 79º 18 E) and Kattumavadi (Lat. 10º 13 N; Long.79º 22 E) South East Coast of India was carried out for a period of one year (from June 2011 to May2012).The study focuses attention on the survey, systematics of marine diatom diversity and the influence of physico-chemical factors on their seasonal distribution. A total of 52 species belonging to 38 genera of marine diatoms were recorded from both stations. The most common genera were Actinocyclus, Amphora, Bacteriastrum, Biddulphia, Chaetoceros, Coscinodiscus, Cyclotella, Diploneis, Gyrosigma, Licmophora, Melosira, Navicula, Nitzschia, Pleurosigma and Tropidoneis were present in the two stations. Higher values of diatom population density were found during summer at both stations. The seasonal distribution and abundance are discussed in relation to physico- chemical parameters.
Physico-chemical parameters and macrobenthic invertebrates of the intertidal ...Angelo Mark Walag
Physico-chemical parameters and macrobenthic invertebrates of the intertidal zone of Gusa, Cagayan de Oro City, Philippines were assessed from March to May 2014. Water temperature, pH, salinity, dissolved oxygen, biological oxygen demand, and type of substrate were determined in the study were within the normal range. A modified transect-quadrat method was used in an approximately 14,000 m2 of study area. Seven hundred twenty seven individuals belonging to 15 species were found in the area. These organisms belong to four phyla namely: Mollusca, Arthropoda, Echinodermata, and Annelida. The three most abundant organisms found were Coenobita clypeatus, Ophiothrix longipeda, and Cypraea poraria with relative abundance of 73.86%, 4.13% and 3.71% respectively. Most of the macrobenthic fauna identified exhibited a clumped pattern of distribution, while the rest are randomly distributed. The species diversity of the area is 1.19 which is very low compared to reports from related studies.
Macrobenthic Invertebrate assemblage along gradients of the river Basantar (J...Agriculture Journal IJOEAR
Abstract— A limnological investigation was carried out in River Basantar in the Jammu province of Jammu & Kashmir (India) during the period from December, 2009 to November, 2011 in order to analyse the effect of industrial pollution on the diversity and population density of Macrobenthic invertebrate fauna along the longitudinal profile of the river. A total of 27 macrobenthic invertebrate taxa inhabited the river; among these Arthropoda dominated the macrobenthic community (81.48%, 22 species) followed by Annelida (11.11%, 3 species) and Mollusca (7.41%, 2 species). The Discharge Zone (St II) had the highest mean standing crop of macrobenthic population while the lowest species number. Oligochaetes (Annelida) and Dipterans (Arthropoda) exhibited their abundance at polluted sites whereas Odonates, Ephemeropterans, Hemipterans, Coleopterans (Arthropoda) and Molluscs were abundant at least polluted sites. Tubifex tubifex, Branchiura sowerbyi, Limnodrillus hoffmeisteri, Chironomus, Tubifera, Psychoda and Physa acuta were identified as pollution indicator taxa while Progomphus, Cloeon, Baetis and Gyraulus as sensitive taxa.
A Rapid marine biodiversity assessment of the coral reefs in morales Beach, B...Innspub Net
Morales beach is one of the beaches located in the coastal town of Glan, Sarangani Province and noted for its quite enormous coral reef which is continuously degrading. This study was conducted to assess the health status of coral reef ecosystem and to evaluate the physico-chemical parameters of the area. Point Intercept Transect (PIT) method was used to monitor live coral condition and the supporting fauna at a coral reef ecosystem. Physico-chemical parameters were obtained in situ using a thermometer, refractometer, and a pH meter. The result of the study showed a very low percentage cover of hard corals, no cover percentage of soft corals and high cover percentage of other biota or substrate. The reef areas exhibited poor coral cover with an average of 15 percent live hard corals having family Acropora as the most dominant species (Shannon diversity index of 1.653). Water samples obtained were within the DENR (1990) standards suitable for the optimum growth of coral reefs. The health status of the coral reefs in Morales beach showed a partially disturbed reef due to human intervention. It is greatly recommended to constantly monitor the coral conditions in order to effectively manage and protect the increasing number of Marine Protected Areas (MPA).
FLORAL DIVERSITY OF MANGROVE ECOSYSTEM FROM COASTAL ENVIRONMENT OF URAN (RAIG...Prabhakar Pawar
Mangrove forests are among the world’s most productive ecosystems and are the only forests situated at the confluence of land and sea in tropical and subtropical latitudes.Mangroves are one of the biologically diverse ecosystems in the world, rich in organic matter and nutrients and support very large biomass of flora and fauna. With continuing degradation and destruction ofmangroves, there is a critical need to understand the biodiversity of the mangrove ecosystems.Mangroves represent spirit of Mumbai and NaviMumbai - they are plucky survivors. Each day, millions of citizens in Mumbai pass these hardy plants imaging they are little more than dirty, muddy weeds growing pointlessly along the shoreline. Overexploitation and unsustainable demand has resulted in considerable degradation of mangrove areas and it is feared that the area under mangroves around Mumbai areas has dwindled by 35% in the last 25 years and only about 20 Km2 of mangroves exist today. During this study, 4 species of true
mangroves representing 3 genera and 3 families, 10 species of mangrove associates belonging to 8 genera and 6 families and 1 species of non-mangrove halophytes were recorded from the mangrove ecosystems of Uran (Raigad), Navi Mumbai,Maharashtra.At present, coastal environment of Uran shows moderate mangrove density but in coming few years, area around Uran coast will be dominated by intense industrialization and urbanization. In such circumstances, pollution of Uran coast cannot be ignored. Therefore, data presented in this paper can be taken as a base line data for better management of these natural resources.
Key words: Mangroves diversity, Uran, Navi Mumbai,Maharashtra
Seasonal Variations and Diversity of Marine Diatoms of Jegathapattinam and Ka...IJSRD
The present study entitled on Seasonal variations and diversity of plantonic marine diatoms of Jegathapattinam (Lat. 09º 95 N: Long. 79º 18 E) and Kattumavadi (Lat. 10º 13 N; Long.79º 22 E) South East Coast of India was carried out for a period of one year (from June 2011 to May2012).The study focuses attention on the survey, systematics of marine diatom diversity and the influence of physico-chemical factors on their seasonal distribution. A total of 52 species belonging to 38 genera of marine diatoms were recorded from both stations. The most common genera were Actinocyclus, Amphora, Bacteriastrum, Biddulphia, Chaetoceros, Coscinodiscus, Cyclotella, Diploneis, Gyrosigma, Licmophora, Melosira, Navicula, Nitzschia, Pleurosigma and Tropidoneis were present in the two stations. Higher values of diatom population density were found during summer at both stations. The seasonal distribution and abundance are discussed in relation to physico- chemical parameters.
Physico-chemical parameters and macrobenthic invertebrates of the intertidal ...Angelo Mark Walag
Physico-chemical parameters and macrobenthic invertebrates of the intertidal zone of Gusa, Cagayan de Oro City, Philippines were assessed from March to May 2014. Water temperature, pH, salinity, dissolved oxygen, biological oxygen demand, and type of substrate were determined in the study were within the normal range. A modified transect-quadrat method was used in an approximately 14,000 m2 of study area. Seven hundred twenty seven individuals belonging to 15 species were found in the area. These organisms belong to four phyla namely: Mollusca, Arthropoda, Echinodermata, and Annelida. The three most abundant organisms found were Coenobita clypeatus, Ophiothrix longipeda, and Cypraea poraria with relative abundance of 73.86%, 4.13% and 3.71% respectively. Most of the macrobenthic fauna identified exhibited a clumped pattern of distribution, while the rest are randomly distributed. The species diversity of the area is 1.19 which is very low compared to reports from related studies.
Macrobenthic Invertebrate assemblage along gradients of the river Basantar (J...Agriculture Journal IJOEAR
Abstract— A limnological investigation was carried out in River Basantar in the Jammu province of Jammu & Kashmir (India) during the period from December, 2009 to November, 2011 in order to analyse the effect of industrial pollution on the diversity and population density of Macrobenthic invertebrate fauna along the longitudinal profile of the river. A total of 27 macrobenthic invertebrate taxa inhabited the river; among these Arthropoda dominated the macrobenthic community (81.48%, 22 species) followed by Annelida (11.11%, 3 species) and Mollusca (7.41%, 2 species). The Discharge Zone (St II) had the highest mean standing crop of macrobenthic population while the lowest species number. Oligochaetes (Annelida) and Dipterans (Arthropoda) exhibited their abundance at polluted sites whereas Odonates, Ephemeropterans, Hemipterans, Coleopterans (Arthropoda) and Molluscs were abundant at least polluted sites. Tubifex tubifex, Branchiura sowerbyi, Limnodrillus hoffmeisteri, Chironomus, Tubifera, Psychoda and Physa acuta were identified as pollution indicator taxa while Progomphus, Cloeon, Baetis and Gyraulus as sensitive taxa.
A Rapid marine biodiversity assessment of the coral reefs in morales Beach, B...Innspub Net
Morales beach is one of the beaches located in the coastal town of Glan, Sarangani Province and noted for its quite enormous coral reef which is continuously degrading. This study was conducted to assess the health status of coral reef ecosystem and to evaluate the physico-chemical parameters of the area. Point Intercept Transect (PIT) method was used to monitor live coral condition and the supporting fauna at a coral reef ecosystem. Physico-chemical parameters were obtained in situ using a thermometer, refractometer, and a pH meter. The result of the study showed a very low percentage cover of hard corals, no cover percentage of soft corals and high cover percentage of other biota or substrate. The reef areas exhibited poor coral cover with an average of 15 percent live hard corals having family Acropora as the most dominant species (Shannon diversity index of 1.653). Water samples obtained were within the DENR (1990) standards suitable for the optimum growth of coral reefs. The health status of the coral reefs in Morales beach showed a partially disturbed reef due to human intervention. It is greatly recommended to constantly monitor the coral conditions in order to effectively manage and protect the increasing number of Marine Protected Areas (MPA).
Tovacov lakes, and the whole area affected by mining, represents a very important refuge for many rare species of plants and animals that can’t find suitable living conditions in the surrounding intensively farmed landscape. Due to the high level of underground water and the presence of gravel bed, Tovacov lakes can be very important wetlands but also interesting xerotherm habitat in the future. Our aim is not only to identify this biodiversity, but also to support it in the future by targeted interventions.
In the first phase of the project large field survey of different habitats were carried out. These surveys will be focused on characteristic areas that differ in moisture, age and the way they were created. Apart from vascular plants and vegetation, we will be focused on major groups of organisms for which such habitats are essential and at the same time there isn’t enough historical data. These are mainly beetles, butterflies and spiders, but other groups of animals will not be left out.
In the second phase a comparison of diversity of locally rare species with their representation in the various habitats was completed. In this way the mapping of biologically valuable sites and habitats that create appropriate conditions for the occurrence of target species is done.
In the third part, created design principles of management for such areas that will support the best possible future existence of discovered organisms and will create suitable biotopes for other types of communities of plants and animals.
The project won the International contest of the Quarry Life Award 2014 in the category “Biodiversity Enhancement”
Read more: http://www.quarrylifeaward.com/project/research-biodiversity-tovacov-lakes
Interface change of seawater and freshwater on Asam – Asam Watersheds, South ...Innspub Net
Temporal change of seawater and fresh water interface in the watershed area needs scientific study on dynamics of ecosystem parameters in different seasons and analysis of satellite imagery. This research aims to assess the change of interface seawater and freshwater from the temporal estuary upstream. The study used four methods: (1) Interviews with local community respondents; determined with snowball method. (2) Secondary data obtained from the Report of Environmental Monitoring Result of Power Plant Operations of Asam – Asam in 2014 (3) Observed parameters include pH, salinity, electrical conductivity in the dry season (August), transition (October) and rainy season (December). (4) Temporal observations with the use of satellite imagery analysis with Nipah (Nypa fruticans Wurmb) as indicator. According to the respondent, seawater intrusion has occurred extremely from the estuary of Asam-Asam river to the upstream. Secondary data shows significant differences in the intake value of DHL Asam-Asam power plant (546 μ mhos/cm) with upstream intake (231 μ mhos/cm) which means the intrusion of sea water is moderate to high level. Field observations show the dry season (August 2013) interface was 12.86 miles from the estuary, whereas in transitional season (October 2013) was 12.53 miles from estuary, and rainy season (December 2013) is 5.24 km from the estuary. Satellite imagery showed the interface in 1991 was 8.13 miles from the estuary and increase upstream from 0.03 to 1.86 per year. In 2014, the interface becomes 12.88 miles from the estuary. This shows that the sea water increasingly moving toward the river. Get more articles at: http://www.innspub.net/volume-6-number-4-april-2015-jbes/
International Refereed Journal of Engineering and Science (IRJES) is a peer reviewed online journal for professionals and researchers in the field of computer science. The main aim is to resolve emerging and outstanding problems revealed by recent social and technological change. IJRES provides the platform for the researchers to present and evaluate their work from both theoretical and technical aspects and to share their views.
Occurrence patterns of alien freshwater turtles in a large urban pond 'Archip...Maria Paola Di Santo
The patterns of the occurrence and distribution of alien freshwater turtle species in an urban pond archipelago (Rome, Italy) were analysed, with the aim of exploring the role of a set of factors (type of ponds, landscape context, size area, distance from the nearest road) with a generalized linear model approach. A total of 311 ponds subdivided in three types (fountains, small basins, lakes) embedded in different landscape contexts (public parks, private parks, urban areas) at differing distances from the nearest road were sampled. Six non-native freshwater turtle species in 31 sites were recorded (9.97%). Lakes exhibited the highest occurrence rates of alien freshwater turtles, compared to small basins and fountains. Freshwater turtle species in urbanized areas were only observed in parks (both public and private). In both the public and private parks, the lakes exhibited the highest percentage of occupied sites, with fountains being the lowest. A direct and significant relationship was observed between pond size and species richness. The distance from the nearest road did not appear to affect species richness. A first interpretation of the data from this study facilitated the postulation of two a posteriori hypotheses that should be tested, as follows: (i) the causal process of turtle release is random, and the rate of extinction (and recapture) is higher in smaller ponds, thus producing the observed pattern; and (ii) the turtle release is not random, and people actively select the ponds they consider more suitable for their pet animals. In this study, it appears the lakes were perceived by those who abandon their pets as the most ecologically suitable habitats among other pond types to accommodate the different species of turtles. Knowledge of people's attitudes in regard to releasing pet animals also might assist managers of public green spaces to develop strategies aimed to preserve local biodiversity, and to educate the public about the conservation issue represented by the alien species.
Utilization of Multiple Habitat Sampling Protocol for Macroinvertebrates as Indicators of Water
Quality in Stream Ecosystem in Lawis,
Buruun, Iligan City
ABSTRACT- Floristic inventory and diversity assessment are necessary to understand the present diversity status of the conservation of biodiversity. Shorelines are one of the most rapidly changing places on the Earth. The Gulf of Kachchh (GoK) is a semi-enclosed coastal indentation with predominance of mangrove ecosystems, coral reefs, associated rich marine diversity and coastal terrestrial vegetation. Halophytes are flowering plants, which are naturally found in saline habitats such as coastal swamps, coastal dunes, inland salt flats etc. Present works reveals the diversity of halophytes in GoK. Total 27 halophytes were encountered from 13 coastal talukas and islands of GoK. Islands of GoK, and Bhachau taluka are the area with highest diversity in GoK. In the present study α diversity (Shannon diversity index, Simpson's Index, species richness, evenness index) of the halophyte community was studied. From the study of biodiversity it was observed that highest species diversity (Shannon-Wiener diversity H’) was observed in Jamnagar district and its islands whereas species richness index (d) was highest in Devbhumi Dwarka district and its islands. Evenness index (e) was highest (0.528) in Morbi district.
Key-words- Halophytes, Gulf of Kachchh, α-Diversity, Saline habitats
Ecology and behavior of Telescopium Telescopium (Linnaeus, 1758), (Mollusca: ...inventionjournals
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
Optimal Salinity, Nitrate and Phosphate Concentrations on Germination and Gro...iosrjce
The effects of salinity, nitrate (N) and phosphate (P) concentrations on the germination of Enhalus
acoroides seeds and growth were studied under laboratory condition. The highest percentage of seed
germination was at 20 ppt salinity for all concentrations of Nand P. However, there was not different (P >0.05) in
the percentage of germinated seed compared with other salinity levels of 25 and 30 ppt at all N and P concentrations. In
regard to the growth rate of seedling was found to be effective to the extension of root and lengths. In present
study, root and leaf lengths of E. acoroides seedling were observed to be significantly declined when the level of
salinity and N and P concentrations increased. Hence, alteration in the major nutrient concentration indicates
the vulnerability of E. acoroides seagrass under culturing laboratory condition, which must be avoidably
approached prior to transplantation into the meadow area for conservative management of seagrass resource.
Changes in benthic communities in the Middle Atlas springs (Morocco) and thei...Innspub Net
The sources of the Moroccan Middle Atlas suffer not only the effects of anthropogenic pressures, but also those of climate change whose impact is difficult to predict. Our goal is to better understand the succession of processions fauna of the upper Guigou. It is a compendium comparative between the benthic fauna collected towards the end of the years 70 (1979) in the sources Arbalou Abrchane, Tit Zil and the Wadi Guigou. As well as those harvested in the same sites, thirty-four years after. This revealed a significant drop in dissolved oxygen concentration decreased from 7.4 (mg/l) in 1979 to 2.52 (mg/l) in 2015. We have also raised an increase in the workload in chlorides and major elements. Benthic fauna, a significant change in population since 1979, with the appearance and installation of more than a dozen of taxa were identified (Simulium pseudoquinum, Gammarus gauthieri, Phagocata sp., Dugesia gonocephala). Some of these species have become invasive, such as Amphipod crustaceans Gammarus gauthieri, either very abundant as Simulium pseudoquinum. We note the effect “medium” for the direct selection of the species. Other indirect effects due to the reduction of the three dimensional biogenic structures would have limited recognizably State niches by polluo-sensitive species (Ephemeroptera, Heteroptera, Coleoptera and Trichoptera) and could contribute to the total disappearance of all order plecoptera in favour of a dominance of the polluo-tolerant species (Oligochaetes). Over a period of 35 years, there is a deterioration of the health of the aquatic ecosystem studied, a State of art reflected by a decline of the benthic community that lives there.
Tovacov lakes, and the whole area affected by mining, represents a very important refuge for many rare species of plants and animals that can’t find suitable living conditions in the surrounding intensively farmed landscape. Due to the high level of underground water and the presence of gravel bed, Tovacov lakes can be very important wetlands but also interesting xerotherm habitat in the future. Our aim is not only to identify this biodiversity, but also to support it in the future by targeted interventions.
In the first phase of the project large field survey of different habitats were carried out. These surveys will be focused on characteristic areas that differ in moisture, age and the way they were created. Apart from vascular plants and vegetation, we will be focused on major groups of organisms for which such habitats are essential and at the same time there isn’t enough historical data. These are mainly beetles, butterflies and spiders, but other groups of animals will not be left out.
In the second phase a comparison of diversity of locally rare species with their representation in the various habitats was completed. In this way the mapping of biologically valuable sites and habitats that create appropriate conditions for the occurrence of target species is done.
In the third part, created design principles of management for such areas that will support the best possible future existence of discovered organisms and will create suitable biotopes for other types of communities of plants and animals.
The project won the International contest of the Quarry Life Award 2014 in the category “Biodiversity Enhancement”
Read more: http://www.quarrylifeaward.com/project/research-biodiversity-tovacov-lakes
Interface change of seawater and freshwater on Asam – Asam Watersheds, South ...Innspub Net
Temporal change of seawater and fresh water interface in the watershed area needs scientific study on dynamics of ecosystem parameters in different seasons and analysis of satellite imagery. This research aims to assess the change of interface seawater and freshwater from the temporal estuary upstream. The study used four methods: (1) Interviews with local community respondents; determined with snowball method. (2) Secondary data obtained from the Report of Environmental Monitoring Result of Power Plant Operations of Asam – Asam in 2014 (3) Observed parameters include pH, salinity, electrical conductivity in the dry season (August), transition (October) and rainy season (December). (4) Temporal observations with the use of satellite imagery analysis with Nipah (Nypa fruticans Wurmb) as indicator. According to the respondent, seawater intrusion has occurred extremely from the estuary of Asam-Asam river to the upstream. Secondary data shows significant differences in the intake value of DHL Asam-Asam power plant (546 μ mhos/cm) with upstream intake (231 μ mhos/cm) which means the intrusion of sea water is moderate to high level. Field observations show the dry season (August 2013) interface was 12.86 miles from the estuary, whereas in transitional season (October 2013) was 12.53 miles from estuary, and rainy season (December 2013) is 5.24 km from the estuary. Satellite imagery showed the interface in 1991 was 8.13 miles from the estuary and increase upstream from 0.03 to 1.86 per year. In 2014, the interface becomes 12.88 miles from the estuary. This shows that the sea water increasingly moving toward the river. Get more articles at: http://www.innspub.net/volume-6-number-4-april-2015-jbes/
International Refereed Journal of Engineering and Science (IRJES) is a peer reviewed online journal for professionals and researchers in the field of computer science. The main aim is to resolve emerging and outstanding problems revealed by recent social and technological change. IJRES provides the platform for the researchers to present and evaluate their work from both theoretical and technical aspects and to share their views.
Occurrence patterns of alien freshwater turtles in a large urban pond 'Archip...Maria Paola Di Santo
The patterns of the occurrence and distribution of alien freshwater turtle species in an urban pond archipelago (Rome, Italy) were analysed, with the aim of exploring the role of a set of factors (type of ponds, landscape context, size area, distance from the nearest road) with a generalized linear model approach. A total of 311 ponds subdivided in three types (fountains, small basins, lakes) embedded in different landscape contexts (public parks, private parks, urban areas) at differing distances from the nearest road were sampled. Six non-native freshwater turtle species in 31 sites were recorded (9.97%). Lakes exhibited the highest occurrence rates of alien freshwater turtles, compared to small basins and fountains. Freshwater turtle species in urbanized areas were only observed in parks (both public and private). In both the public and private parks, the lakes exhibited the highest percentage of occupied sites, with fountains being the lowest. A direct and significant relationship was observed between pond size and species richness. The distance from the nearest road did not appear to affect species richness. A first interpretation of the data from this study facilitated the postulation of two a posteriori hypotheses that should be tested, as follows: (i) the causal process of turtle release is random, and the rate of extinction (and recapture) is higher in smaller ponds, thus producing the observed pattern; and (ii) the turtle release is not random, and people actively select the ponds they consider more suitable for their pet animals. In this study, it appears the lakes were perceived by those who abandon their pets as the most ecologically suitable habitats among other pond types to accommodate the different species of turtles. Knowledge of people's attitudes in regard to releasing pet animals also might assist managers of public green spaces to develop strategies aimed to preserve local biodiversity, and to educate the public about the conservation issue represented by the alien species.
Utilization of Multiple Habitat Sampling Protocol for Macroinvertebrates as Indicators of Water
Quality in Stream Ecosystem in Lawis,
Buruun, Iligan City
ABSTRACT- Floristic inventory and diversity assessment are necessary to understand the present diversity status of the conservation of biodiversity. Shorelines are one of the most rapidly changing places on the Earth. The Gulf of Kachchh (GoK) is a semi-enclosed coastal indentation with predominance of mangrove ecosystems, coral reefs, associated rich marine diversity and coastal terrestrial vegetation. Halophytes are flowering plants, which are naturally found in saline habitats such as coastal swamps, coastal dunes, inland salt flats etc. Present works reveals the diversity of halophytes in GoK. Total 27 halophytes were encountered from 13 coastal talukas and islands of GoK. Islands of GoK, and Bhachau taluka are the area with highest diversity in GoK. In the present study α diversity (Shannon diversity index, Simpson's Index, species richness, evenness index) of the halophyte community was studied. From the study of biodiversity it was observed that highest species diversity (Shannon-Wiener diversity H’) was observed in Jamnagar district and its islands whereas species richness index (d) was highest in Devbhumi Dwarka district and its islands. Evenness index (e) was highest (0.528) in Morbi district.
Key-words- Halophytes, Gulf of Kachchh, α-Diversity, Saline habitats
Ecology and behavior of Telescopium Telescopium (Linnaeus, 1758), (Mollusca: ...inventionjournals
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
Optimal Salinity, Nitrate and Phosphate Concentrations on Germination and Gro...iosrjce
The effects of salinity, nitrate (N) and phosphate (P) concentrations on the germination of Enhalus
acoroides seeds and growth were studied under laboratory condition. The highest percentage of seed
germination was at 20 ppt salinity for all concentrations of Nand P. However, there was not different (P >0.05) in
the percentage of germinated seed compared with other salinity levels of 25 and 30 ppt at all N and P concentrations. In
regard to the growth rate of seedling was found to be effective to the extension of root and lengths. In present
study, root and leaf lengths of E. acoroides seedling were observed to be significantly declined when the level of
salinity and N and P concentrations increased. Hence, alteration in the major nutrient concentration indicates
the vulnerability of E. acoroides seagrass under culturing laboratory condition, which must be avoidably
approached prior to transplantation into the meadow area for conservative management of seagrass resource.
Changes in benthic communities in the Middle Atlas springs (Morocco) and thei...Innspub Net
The sources of the Moroccan Middle Atlas suffer not only the effects of anthropogenic pressures, but also those of climate change whose impact is difficult to predict. Our goal is to better understand the succession of processions fauna of the upper Guigou. It is a compendium comparative between the benthic fauna collected towards the end of the years 70 (1979) in the sources Arbalou Abrchane, Tit Zil and the Wadi Guigou. As well as those harvested in the same sites, thirty-four years after. This revealed a significant drop in dissolved oxygen concentration decreased from 7.4 (mg/l) in 1979 to 2.52 (mg/l) in 2015. We have also raised an increase in the workload in chlorides and major elements. Benthic fauna, a significant change in population since 1979, with the appearance and installation of more than a dozen of taxa were identified (Simulium pseudoquinum, Gammarus gauthieri, Phagocata sp., Dugesia gonocephala). Some of these species have become invasive, such as Amphipod crustaceans Gammarus gauthieri, either very abundant as Simulium pseudoquinum. We note the effect “medium” for the direct selection of the species. Other indirect effects due to the reduction of the three dimensional biogenic structures would have limited recognizably State niches by polluo-sensitive species (Ephemeroptera, Heteroptera, Coleoptera and Trichoptera) and could contribute to the total disappearance of all order plecoptera in favour of a dominance of the polluo-tolerant species (Oligochaetes). Over a period of 35 years, there is a deterioration of the health of the aquatic ecosystem studied, a State of art reflected by a decline of the benthic community that lives there.
Effect of water parameters on temporal distribution and abundance of zooplank...AbdullaAlAsif1
Seasonal abundance of zooplankton in relation to different physico-chemical conditions of Kaptai lake has been studied. A total of four major groups of zooplankton were identified from study area of Kaptai lake during three seasons observation at pre-monsoon, monsoon and Post-monsoon. These four groups were categorized into rotifers, copepods, cladocerans and others (fish larvae, shrimp larvae, insects, mosquito larvae etc.). The mean abundance of group rotifers, copepods, cladoceras and others were 103, 84.67, 38.33 and 41.83 ind. L-1 respectively. The highest group was rotifers in terms of abundance and composition where compositions were recorded 38 % at three season's observation. The lowest group was cladoceras in term of abundance and composition where compositions were recorded 14 %. The air temperature, water temperature, transparency, water pH, DO, BOD5, PO 4-P, NO 2-N, SiO 3-Si, TSS, TDS, Alkalinity ranged between 21 and 27.5C, 23.5 and 31.5C, 0.8 and 3 m, 7.1 and 7.5, 5.72 and 8.58 mg/l, 8.55 and 12.87 mg/l, 3.22 and 4.13 µg/l, 0.992 and 1.19 µg/l, 161.18 and 201.15 µg/l, 0.28 and 0.48 g/l, 0.18 and 0.68 g/l, 40 and 60 ppm, respectively. Margalef richness index (d), Pielou's evenness index (J'), Shannon-Wiener diversity index (H'), Simpson dominance index (λ) are analyzed by Primer V6 software to quantify the collected species. Through same software SIMPER, Cluster analysis also done to compare similarity between season.
Diversity and abundance of Macrobenthos in a subtropical estuary, BangladeshAbdullaAlAsif1
Soft bottom macrobenthos are important component of the marine and coastal trophic chain. There has been sparse information regarding the distribution of soft bottom macrobenthos form the coastal water of Bangladesh. Consequently, the present study was an effort to reveal the diversity and abundance of macrobenthos in the Feni Estuary in a seasonal pattern together with the hydrological factors. A total of 17 taxa families of soft-bottom invertebrates were found over the two sampling seasons. The current study yielded a total number of 34,726 ind./m 2 (mean 2480ind./m 2) including 18,909ind./m 2 in wet season (mean 2682ind./m 2) and 15,817 ind./m 2 in dry season (2259ind./m 2). The highest density of soft-bottom invertebrates was in the wet season while the lowest number in the dry season. A total of 5 groups of macrobenthos were found over the two sampling seasons. The dominant group was Polychaeta that contributed 43.60% of the total soft-bottom invertebrates. The values of biodiversity indices were higher in dry season compare to the wet season in most of the sampling station during the study period.
Specific physicochemical parameters influence on the plankton structure in ag...Innspub Net
The continuous discharge of effluents into Warri River, impacts on its water quality parameters as well as plankton species which requires commensurate surveillance. This study focuses on its physicochemical characteristics and their influence on plankton composition and abundance. The surface water samples and plankton collected monthly from June to November 2014 were analyzed using standard methods. The physicochemical parameters showed variations among the stations. The ANOVA results revealed that water temperature, transparency, turbidity, TDS, conductivity, pH, acidity, Dissolved Oxygen and phosphate were significantly different (P <0.05) among the studied sites. A total of 849 plankton species identified; 814 species were phytoplankton consisting of four groups (Bacillariophyta> Chlorophyta> Euglenophyta> Cyanophyta, arranged in order of dominance. While zooplankton had 35 species grouped into 5 groups; Rotifera> Copepoda> Protozoa> Cladocera> Arachnida, in order of dominance. Pearson correlation revealed a significant correlation between different Plankton species population and some parameters (p<0.05). The principal component analysis labelled acidity, organic load, mineralization, nutrient, and organic pollution as influential factors governing plankton abundance in the studied area. These factors identify with materials from industries and human activities along the river, which results in the alteration of plankton composition, particularly Melosira granulata (Ehrenberg) Ralfs,1861. Inferred biological indicator of the water body. Diversity indices ranged from 0.28 to 1.39; Station 2 had the highest (1.39) and Station 1 the lowest species richness, a highly polluted river.
Diversity of halophilic mycoflora habitat in saltpans of Tuticorin and Marakk...Open Access Research Paper
Highly diverse biological system of solar salterns with different salinities, often provide high densities of mycofloral populations, makes the salterns excellent model systems for both its diverse and activity. In this study, diversity of halophilic fungi in six stations which includes reservoir, evaporator and crystallizer pond of both Marakkanam and Tuticorin saltpans in relation to environmental parameters were carried out for a period of two years. 95 species of halophilic fungi from water and sediment samples belongs to 41 genera were recorded in both saltpans. Aspergillus and Penicillium species were recorded as dominant, vast differences in growth of each isolate at different salt concentrations in the ponds were observed. This paper also elucidated the slight fluctuations in physico-chemical parameter among the ponds with respect to seasonal variations were also recorded.
The effects of different water quality parameters on zooplankton distribution...iosrjce
IOSR Journal of Environmental Science, Toxicology and Food Technology (IOSR-JESTFT) multidisciplinary peer-reviewed Journal with reputable academics and experts as board member. IOSR-JESTFT is designed for the prompt publication of peer-reviewed articles in all areas of subject. The journal articles will be accessed freely online
Environmental conditions and zooplankton community structure in five ponds in...Innspub Net
The degradation of surface water quality in Cameroon is linked to the absence of a functional waste management strategy. For such a strategy to be efficient, a general understanding of aquatic ecosystems will be of importance, these management strategies are particularly lacking in the eastern part of the country. To better understand and appreciate the ecosystems in the town of Bertoua, five ponds where chosen for the physicochemical and zooplankton communities analysis. Sampling on these ponds was conducted from March 2016 to April 2017 on a monthly basis. Samples for physicochemical analysis were collected at 20cm below water surface at the middle of each pond and measured were done following the recommendations of Rodier and Alpha. Biological samples were collected by filtering 50 liters of water through a 64µm mesh opening sieve. Identification was done using standard methods and identification keys. One-way ANOVA analysis was conducted to assess the potential differences between the different ponds base monthly observations. Although they are all hypereutrophic, with regard to the values of the physicochemical parameters, the five ponds showed no significant difference between them but, the structure of the zooplankton community remains very diverse. 118 zooplankton species have been identified in the five ponds. The distribution of zooplankton in these hydrosystems was mainly governed by the presence of organic matter. This study sheds light on the status and biological diversity of ponds in eastern Cameroon, data on which to rely to develop management strategies.
Ecology and feeding behavior of Sanguinolaria acuminata (Reeve, 1857) (Bival...inventionjournals
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
3 ijfaf jul-2017-1-evaluation of the ichthyofaunalAI Publications
Fish constitute more than half of the total number of all the aquatic vertebrates in the world; thus, a study was carried out for six months from January-June, 2016 to investigate the physico-chemical parameters, composition, abundance and diversity of ichthyofauna present in some sections of Omambala, Ezu and Ahommiri Rivers in Anambra state, Nigeria. Water samples were collected for physico-chemical analysis and fish samples were also collected with the assistance of artisanal fishermen using different types of traditional fishing gears namely - gill nets, cast nets, hook and line, local traps (baited) and bag nets to evaluate fish species composition and abundance. The result of the physico-chemical analysis showed uniform values for temperature (25±0.16oC-30±0.48oC), dissolved oxygen (3.65±0.78-5.65±0.11mg/l) and biochemical oxygen demand (13±0.03-16±0.08mg/l) which favoured the distribution of fishes present in different sections of the three Rivers. A total catch of 11,031 fishes were recorded from the three Rivers which comprised 11 orders, 29 families, 43 genera and 69 species. Umuoba-Anam section had 9691 catches, Ebenebe section (702) and Awa section (638). Monthly composition showed highest in March (1,909) and June (2,294) for dry and rainy seasons respectively. Seasonal composition showed highest during the rainy season with a total number of 5922 fishes while 5109 fishes was recorded for the dry season. The diversity indices of the three Rivers indicated diverse communities with ten common species variety and Shannon Weiner (H’) diversity index of 2.755-3.682. Tilapia zilli (22.2%) was the most common and abundant species followed by Clarias anguillaris (21.4%), Malapterus electricus (18.9%), Heterobranchus bidorsalis (15.4%), Xenomystis nigri (14.6%), Heterotis niloticus (13.0%), Auchenoglanis monkei (11.0%), Tilapia dageti (10.2%), Hepsetus odoe (8.1%) and Bagrus filamentosus (7.2%). The study revealed that taxa richness and species diversity increase with increased water level and uniform physico-chemical changes. Further survey of fish species diversity and abundance should be carried out continuously for a longer period on a larger scale for a thorough assessment of the water bodies and their fishery potentials.
Abundance Plankton and Analysis Stomach Content and Trophic Level in Makassar...Agriculture Journal IJOEAR
The research aims to know the condition of environmental parameters both from biological factors and physical factors of the Makassar Strait during the East season. The usability of the research ie can be to build and simulate dynamic models of fisheries systems. Data Collection has been carried since May 2019 to November 2019. Data collection on environmental parameters (temperature, salinity, pH, dissolved oxygen, flow velocity) and nutrients (nitrates and phosphates), phytoplankton and zooplankton abundance, , and gastric contents analysis were carried out, Method for analysing was used analysis of variance (ANOVA) to compare environmental parameters, nutrients and abundance of plankton between the three districts observed. The relationship between the abundance of plankton with environmental parameters was analyzed by using multiple linear regression analysis. Determination of trophic level is based on analysis of gastric contents using the TrophLab 2K program. Results of analysis of variance (ANOVA) between observation stations grouped in 6 months of observation showed that salinity was significantly different between locations and months of observation, temperature and pH were significantly different between months but did not differ according to location of observation, whereas DO levels did not show differences either between locations. The results of identification of phytoplankton types obtained during this research were dominated by diatoms. The type of zooplankton obtained is generally dominated by copepods. The result of gastric surgery is 10 dominant and economically valuable fish's species belonging to planktivor, omnivor and carnivor fish, and based on ecosystems including pelagic and demersal fish.
Species composition of benthic macroalgae in the coastal areas of Surigao Cit...Innspub Net
This study aimed to determine the species composition of the benthic macroalgae in relation to the environmental parameters in one of the coastal areas in Surigao City, Philippines. It is conducted along the coasts of Barangay Day-asan with established three stations. The macroalgae species were observed and collected using line transect method. The water quality parameters were obtained in situ using water quality apparatus and the species composition were determined through diversity indices such as Shannon H, dominance and evenness and abundance. There were six (6) species observed in the study site. Sargassum polycystum is the most abundant and is present in three stations. As to diversity indices, the benthic macroalgae has a moderate category in terms of Shannon H, low dominance and almost a uniform distribution of species in all three stations. The coastal water parameters of Barangay Day-asan passed the DAO standards and still within the limits and ranges based on the diversity indices of Shannon H, dominance and evenness. Depth has a strong correlation to Codium fragile and pH to Amphiroa fragillissima and Halimeda opuntia. As indicated by the diversity indices of the benthic macroalgae species composition, the coastal water of Barangay Day-asan has still a suitable environmental condition for their growth. Hence, it is recommended to have strong information, education and communication environmental campaign and policies for locals and tourists as ecotourism starts to kick off in the locality to ensure sustainable conservation and protection of the natural environment with benthic macroalgae as good bioindicators.
Variation in the plankton abundance, biomass and diversity of Municipal pond ...AbdullaAlAsif1
This is the first approach to identification, abundance calculation; biomass analysis and diversity evaluation in two water bodies namely, Municipal pond and Bukvora baor at Jashore district, Bangladesh. The present study was conducted to find out the abundance and species diversity of plankton, water quality parameters in pond and baor environment. However, Municipal pond that is located at the central point of Jashore town and Bukvora baor that is located at sadar upazila in Jashore district. Study also concentrated on the comparison about abundance, species diversity and water quality parameters between pond and baor. Water samples were collected in each month throughout the study period from May, 2016 to August, 2016. Different water quality parameters such as air temperature, water temperature, dissolve oxygen; pH and transparency were measured in every month. The mean water parameters such as air temperature, water temperature, dissolve oxygen; pH and transparency were 30.4±2.30°C, 32.25 ± 2.6°C, 5.7±0.35 mg/l, 7.05 ± 0.39 and 19.9 ± 2.6 cm, respectively in pond. In baor, the mean water parameters such as air temperature, water temperature, dissolve oxygen, pH and transparency were 33.45 ± 1.19°C, 33.15 ± 1.49°C, 5.03 ± 0.15 mg/l, 8.45 ± 0.36 and 24.95 ± 2.6 cm, respectively. A total of 30 phytoplankton species have been found in the study area of which species under four groups; namely Cyanophyta (5), Heterokontophyta (3), Chlorophyta (11), Euglenophyta (2) have been identified and nine species were unidentified. Phytoplankton species distribution was not uniform. Chlorophyta species was most dominant group in both environments. Major four groups of zooplankton identified in study area both pond and baor; namely Cladocera (10%), Copepoda (55%), Ostracoda (3%), Rotifera (15%). In addition Nauplius (2%), Tunicata (4%), Insect larve (5%) fish eggs (6%) were also identified. Copepoda species was most dominant group in both environments. Plankton diversity was highest in June occurred in both environments.
EVALUATION OF GROUNDWATER QUALITY OF VAIPPAR BASIN, TAMIL NADU, INDIA: A GEOI...SagarChougule11
The Vaippar Basin, one of the important basins of Tamil Nadu is located between 9° 0' 05" & 9° 44' 56" N latitudes and 77° 23' 25" & 78° 17' 02" E longitudes with an area of 5339 sq.km. Groundwater samples were collected from 91 different locations in the Vaippar basin, Tamil Nadu, India. Groundwater quality data for the period of 30 years (1983 to 2013) of both pre-monsoon and post-monsoon periods were used to analyze the groundwater quality aspects of the Vaippar basin. The physico-chemical parameters such as Total Dissolved Solids (TDS), pH, HCO3-, Ca2+, Mg2+, Na+, K+, SO4-, NO3- and Cl have been analyzed to determine the geological and non-geological source of contamination. An overall hydrogeochemical analytical study using Electrical Conductivity, Sodium Adsorption Ratio (SAR), Sodium percentage (Na%) and Residual Sodium Carbonate (RSC) values reveals that most of the groundwater samples collected from the study area are suitable for drinking, irrigation, and industrial purposes.
An Examination of Effectuation Dimension as Financing Practice of Small and M...iosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Does Goods and Services Tax (GST) Leads to Indian Economic Development?iosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Childhood Factors that influence success in later lifeiosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Emotional Intelligence and Work Performance Relationship: A Study on Sales Pe...iosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Customer’s Acceptance of Internet Banking in Dubaiiosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
A Study of Employee Satisfaction relating to Job Security & Working Hours amo...iosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Consumer Perspectives on Brand Preference: A Choice Based Model Approachiosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Student`S Approach towards Social Network Sitesiosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Broadcast Management in Nigeria: The systems approach as an imperativeiosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
A Study on Retailer’s Perception on Soya Products with Special Reference to T...iosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
A Study Factors Influence on Organisation Citizenship Behaviour in Corporate ...iosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Consumers’ Behaviour on Sony Xperia: A Case Study on Bangladeshiosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Design of a Balanced Scorecard on Nonprofit Organizations (Study on Yayasan P...iosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Public Sector Reforms and Outsourcing Services in Nigeria: An Empirical Evalu...iosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Media Innovations and its Impact on Brand awareness & Considerationiosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Customer experience in supermarkets and hypermarkets – A comparative studyiosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Social Media and Small Businesses: A Combinational Strategic Approach under t...iosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Secretarial Performance and the Gender Question (A Study of Selected Tertiary...iosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Implementation of Quality Management principles at Zimbabwe Open University (...iosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Organizational Conflicts Management In Selected Organizaions In Lagos State, ...iosrjce
IOSR Journal of Business and Management (IOSR-JBM) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of business and managemant and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications inbusiness and management. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Seminar of U.V. Spectroscopy by SAMIR PANDASAMIR PANDA
Spectroscopy is a branch of science dealing the study of interaction of electromagnetic radiation with matter.
Ultraviolet-visible spectroscopy refers to absorption spectroscopy or reflect spectroscopy in the UV-VIS spectral region.
Ultraviolet-visible spectroscopy is an analytical method that can measure the amount of light received by the analyte.
Multi-source connectivity as the driver of solar wind variability in the heli...Sérgio Sacani
The ambient solar wind that flls the heliosphere originates from multiple
sources in the solar corona and is highly structured. It is often described
as high-speed, relatively homogeneous, plasma streams from coronal
holes and slow-speed, highly variable, streams whose source regions are
under debate. A key goal of ESA/NASA’s Solar Orbiter mission is to identify
solar wind sources and understand what drives the complexity seen in the
heliosphere. By combining magnetic feld modelling and spectroscopic
techniques with high-resolution observations and measurements, we show
that the solar wind variability detected in situ by Solar Orbiter in March
2022 is driven by spatio-temporal changes in the magnetic connectivity to
multiple sources in the solar atmosphere. The magnetic feld footpoints
connected to the spacecraft moved from the boundaries of a coronal hole
to one active region (12961) and then across to another region (12957). This
is refected in the in situ measurements, which show the transition from fast
to highly Alfvénic then to slow solar wind that is disrupted by the arrival of
a coronal mass ejection. Our results describe solar wind variability at 0.5 au
but are applicable to near-Earth observatories.
Observation of Io’s Resurfacing via Plume Deposition Using Ground-based Adapt...Sérgio Sacani
Since volcanic activity was first discovered on Io from Voyager images in 1979, changes
on Io’s surface have been monitored from both spacecraft and ground-based telescopes.
Here, we present the highest spatial resolution images of Io ever obtained from a groundbased telescope. These images, acquired by the SHARK-VIS instrument on the Large
Binocular Telescope, show evidence of a major resurfacing event on Io’s trailing hemisphere. When compared to the most recent spacecraft images, the SHARK-VIS images
show that a plume deposit from a powerful eruption at Pillan Patera has covered part
of the long-lived Pele plume deposit. Although this type of resurfacing event may be common on Io, few have been detected due to the rarity of spacecraft visits and the previously low spatial resolution available from Earth-based telescopes. The SHARK-VIS instrument ushers in a new era of high resolution imaging of Io’s surface using adaptive
optics at visible wavelengths.
Richard's aventures in two entangled wonderlandsRichard Gill
Since the loophole-free Bell experiments of 2020 and the Nobel prizes in physics of 2022, critics of Bell's work have retreated to the fortress of super-determinism. Now, super-determinism is a derogatory word - it just means "determinism". Palmer, Hance and Hossenfelder argue that quantum mechanics and determinism are not incompatible, using a sophisticated mathematical construction based on a subtle thinning of allowed states and measurements in quantum mechanics, such that what is left appears to make Bell's argument fail, without altering the empirical predictions of quantum mechanics. I think however that it is a smoke screen, and the slogan "lost in math" comes to my mind. I will discuss some other recent disproofs of Bell's theorem using the language of causality based on causal graphs. Causal thinking is also central to law and justice. I will mention surprising connections to my work on serial killer nurse cases, in particular the Dutch case of Lucia de Berk and the current UK case of Lucy Letby.
A brief information about the SCOP protein database used in bioinformatics.
The Structural Classification of Proteins (SCOP) database is a comprehensive and authoritative resource for the structural and evolutionary relationships of proteins. It provides a detailed and curated classification of protein structures, grouping them into families, superfamilies, and folds based on their structural and sequence similarities.
Professional air quality monitoring systems provide immediate, on-site data for analysis, compliance, and decision-making.
Monitor common gases, weather parameters, particulates.
(May 29th, 2024) Advancements in Intravital Microscopy- Insights for Preclini...Scintica Instrumentation
Intravital microscopy (IVM) is a powerful tool utilized to study cellular behavior over time and space in vivo. Much of our understanding of cell biology has been accomplished using various in vitro and ex vivo methods; however, these studies do not necessarily reflect the natural dynamics of biological processes. Unlike traditional cell culture or fixed tissue imaging, IVM allows for the ultra-fast high-resolution imaging of cellular processes over time and space and were studied in its natural environment. Real-time visualization of biological processes in the context of an intact organism helps maintain physiological relevance and provide insights into the progression of disease, response to treatments or developmental processes.
In this webinar we give an overview of advanced applications of the IVM system in preclinical research. IVIM technology is a provider of all-in-one intravital microscopy systems and solutions optimized for in vivo imaging of live animal models at sub-micron resolution. The system’s unique features and user-friendly software enables researchers to probe fast dynamic biological processes such as immune cell tracking, cell-cell interaction as well as vascularization and tumor metastasis with exceptional detail. This webinar will also give an overview of IVM being utilized in drug development, offering a view into the intricate interaction between drugs/nanoparticles and tissues in vivo and allows for the evaluation of therapeutic intervention in a variety of tissues and organs. This interdisciplinary collaboration continues to drive the advancements of novel therapeutic strategies.
Aspects of the Geomorphology and Limnology of some molluscinhabited freshwater bodies in northern Nigeria
1. IOSR Journal of Environmental Science, Toxicology and Food Technology (IOSR-JESTFT)
e-ISSN: 2319-2402,p- ISSN: 2319-2399.Volume 9, Issue 11 Ver. I (Nov. 2015), PP 20-29
www.iosrjournals.org
DOI: 10.9790/2402-091112029 www.iosrjournals.org 20 | Page
Aspects of the Geomorphology and Limnology of some mollusc-
inhabited freshwater bodies in northern Nigeria
1
Gadzama, I.M.K*., 2
Ezealor, A.U., 1
Aken’Ova T. and 1
Balarabe, M.L.
1
Department of Biological Sciences, Ahmadu Bello University Zaria Nigeria.
2
Department of Fisheries and Environmental Management, Michael Opara University of Agriculture
Umudike Nigeria.
*Corresponding Author: ibskatsallah@gmail.com
Abstract: A three-year study was conducted in twenty five mollusc – inhabited water bodies spread across four
hydrological areas in northern Nigeria. This was done to determine some aspects of the geomorphology and
limnology of the water bodies. Four sampling stations were selected along a line transect across each water
body for collection of aquatic molluscs, measurement of physico-chemical factors and other parameters. A
portable Combo Hanna® meter was used to measure pH, electrical conductivity, water temperature and total
dissolved solids while alkalinity, sulphate, nitrate, phosphate, chloride, hardness, dissolved oxygen and
biological oxygen demand were determined by titration. The specimens of freshwater molluscs collected were
identified using standard procedure. The result of the study showed that a total of 14 species of freshwater
molluscs belonging to 9 families were found in the water bodies. The linear regression analysis showed positive
relationships between elevation and temperature, alkalinity, chloride and nitrate, indicating corresponding
variations with different elevations. The negative relationship between altitude and pH, hardness and dissolved
oxygen signifies that water bodies at higher elevations had lower values for these environmental variables. The
Canonical Correspondence Analysis (CCA) established the relationships amongst the environmental factors
that characterised the water bodies. The substrata of the water bodies showed heterogeneity. Water
temperature, pH, dissolved oxygen, alkalinity, hardness, phosphate phosphorus and sulphate were the likely
important factors that are significantly related in the water bodies within hydrological areas. The intense
human activity associated with the water bodies could also have negative impact on the aquatic ecology of the
study area.
Key words: Freshwater, molluscs, geomorphology, limnology, northern Nigeria.
I. Introduction
Fresh waters of the world are collectively experiencing markedly accelerating rates of qualitative and
quantitative degradation (Wetzel, 1992). Freshwater ecosystems contain approximately 12% of the Earth’s
animal diversity, and most other species depend on them indirectly for their survival (Abramovitz, 1996).
Despite their importance, freshwater ecosystems are rapidly being modified or destroyed (Allan and Flecker,
1993; Green et al., 2002) and many species have consequently become endangered (Master et al., 1998; Duncan
and Lockwood, 2001; Perez-Losada et al., 2002; Abellan et al., 2005). Limnological studies on water bodies in
West Africa have mainly focused on larger waters such as River Sokoto (Holden and Green, 1960), Lake Chad
(Carmouze et al., 1983) the Volta river system (Biney, 1990), Niger lakes (Segers et al., 1992) and Lake Kainji
(Bidwell and Clarke, 1997). Very little attention has been given to many smaller lakes and reservoirs around,
whose study could contribute significantly to the understanding of tropical freshwater ecosystems and the
impact of anthropogenic activities on freshwater system (Araoye, 2002). Among other factors, total hardness,
pH, altitude, size of water bodies, temperature, vegetation and pollution were among the significant factors
influencing the distribution and abundance of molluscs (Dillion, 2000). Eleutheradis and Lazaridou-Dimitriadou
(1995) reported that hardnesss and pH are the most important factors that both directly and indirectly influence
metabolic activities and thereby growth and abundance of freshwater molluscs. Clements et al. (2006) reported
the importance of six different habitats (i.e. catchment reservoirs, estuarine reservoirs, forest streams, rural
streams, ponds and monsoon canals) for conserving the diversity of freshwater molluscs; key environmental
factors (e.g. pH) affecting molluscan distribution; important biogeographical determinants (e.g. area) of
molluscan richness within each habitat and the habitat affinities of introduced species. The geomorphologic
aspects of freshwater habitats may explain the zoogeography of some species of freshwater molluscs (Kohl,
2006). Therefore this study provides information on the geomorphological and limnological features of some
molluscs-inhabited freshwater bodies in northern Nigeria.
2. Aspects of the Geomorphology and Limnology of some mollusc-inhabited freshwater bodies....
DOI: 10.9790/2402-091112029 www.iosrjournals.org 21 | Page
II. Materials And Methods
Study Area
Sampling sites were spread across northern Nigeria (Long. 8o
– 14o
N; Lat 3o
– 14o
E). Northern Nigeria
falls within the savanna ecoregion. The guinea savanna covers the north-central and part of the north-west; the
Sudan savanna covers most part of the north-east and north- west. The Sahel savanna covers a small portion in
the extreme north-east zone close to Lake Chad. The inland waters in northern Nigeria include rivers (mostly
seasonal), lakes, mine ponds, flood plains, reservoirs and streams (Happold, 1987). These water bodies
constitute the five hydrological areas/basins that occur in the area (Ita, 1993). All of the region’s lotic
waterbodies drain into the Rivers Niger and Benue and Lake Chad, the three major sumps for run-off-water in
the region.
Study Design
A hydrological map of Nigeria was used in the random selection of major water bodies according to
their hydrological areas. Possible collection sites were determined on the basis of on-the-spot-assessment (which
include presence of rich vegetation at fringes, floating algal mats, etc) of the potential sample areas. Molluscs
were collected over a period of three years, during the wet and dry seasons.
Collection and Preservation of Molluscs
Heights and breadths of the shells were measured with a sliding caliper. The number of whorls
characteristic of each species’ shell was counted and the direction of the spiral coil noted. All live and dead
aquatic shells were collected and preserved in labelled collection bottles containing 95% alcohol, and taken to
the laboratory for further examination.
Measurement of Geomorphological Features
The geographic location (the longitude, latitude and elevation) of each sampling site was determined
using a Global Positioning System (GPS), Model N9 GARMIN eTrexLegend™, personal navigator®.
Environmental observations (such as soil texture, nature of substratum, etc) and observations of associated
aquatic vegetation (using a three point scale: 1- sparse, little or no floating vegetation; 2- floating algal mats
with macrophytes; 3- algal mats on dense vegetation along the shores) were recorded.
Collection and Analysis of Water Samples
Water samples were collected in triplicate from sites of molluscs’ collections using 2- litre plastic
bottles. Collection containers were properly washed with detergent, rinsed with distilled water and air-dried
prior to sampling. Collection containers were rinsed with sampled water just before sample collection. Standard
Biochemical Oxygen Demand (BOD) bottles were used to collect water samples for BOD and Dissolved
Oxygen (DO) determination.
Determination of Physico-chemical Factors
A portable Combo Hanna® instrument, Model 98129, was used to measure pH, Electrical
Conductivity, Water Temperature and Total Dissolved Solids at the site of collection of aquatic molluscs. The
following parameters were determined by titration according to APHA (1998): Alkalinity, Sulphate, Nitrate,
Phosphate, Chloride, Hardness, Dissolved Oxygen (DO) and Biological Oxygen Demand (BOD).
Identification of Molluscs
Molluscs collected were identified using the taxonomic guides by Burch (1989), Barney (2000) and
Thompson (2004).
Statistical Analysis
Linear regression analysis was used to determine the relationship (if any) between elevation and
physicochemical parameters using Analyse-it v.2.14 (Analyse-it, version 2008). A multivariate ordination
technique (Canonical Correspondence Analysis), using Multi-Variate Statistical Package (MVSP) software, was
used to establish possible relationships between the distribution of aquatic molluscs and physicochemical
parameters.
III. Results
Geomorphological Characteristics of the Freshwater Bodies
A total of 25 (lotic and lentic) freshwater bodies that had one or more mollusc species, in the four
hydrological areas of northern Nigeria, were investigated. The water bodies varied in their locations, sizes,
3. Aspects of the Geomorphology and Limnology of some mollusc-inhabited freshwater bodies....
DOI: 10.9790/2402-091112029 www.iosrjournals.org 22 | Page
elevation and aquatic vegetation (Table 1). The location of the water bodies above sea level varied considerably,
with the lowest elevation of 140 (m) at Kainji Lake (Niger State), which also is the largest of the drainage
systems. The highest elevation of 669 (m) was in Sabuwa (Katsina State), one of the smallest of the water
bodies studied. The nature of the substratum was largely a combination of fine sand, mud and rocks. A high
level of anthropogenic activities characterized most of the water bodies.
Physicochemical Characteristics of the Water Bodies Studied
The values for temperature, electrical conductivity (EC), total dissolved solids (TDS), alkalinity,
sulphate, chloride and hardness of the water bodies were remarkably heterogeneous showing wide variations,
with mean values of 28.14±0.65o
C, 69.92±13.56µs/cm, 35.65±6.88ppm, 44.89±3.86, 130.60±18.02mg/l,
52.12±9.89mg/l and 50.89±2.51 respectively (Table 2). The water pH varied between 5.37 (acidic) and 8.71
(alkaline) with a near neutral mean value of 7.17±0.20. There was slight variation in the amount of dissolved
oxygen (DO) and biochemical oxygen demand (BOD) of the water bodies, with mean values of 5.48±0.31mg/l
and 1.39±0.39mg/l respectively (Table 2).
Molluscs Composition of the Water Bodies
The composition of freshwater molluscs of the 25 water bodies studied had 15 species of snails belonging to 9
families (Table 3). Three of the families belong to the class Bivalvia while the others are of the class
Gastropoda.
Table 1: Geomorphological Characteristics of the Freshwater Bodies of the Four Hydrological Areas of
northern Nigeria.
4. Aspects of the Geomorphology and Limnology of some mollusc-inhabited freshwater bodies....
DOI: 10.9790/2402-091112029 www.iosrjournals.org 23 | Page
Table 2: Mean values of physico-chemical factors at the studied water bodies. s.e. in parentheses
Table 3: Checklist of molluscs in the water bodies studied in northern Nigeria
Class Family Species
BIVALVIA Unionidae Anodonta marginata
A. anatina
A. implicata
Mutelidae Aspatheria sp.
Etheriidae Etheria elliptica
GASTROPODA Viviparidae Bellamya crawshayi
B. unicolor
Paludomidae Cleopatra bulimoides
Thiaridae Melanoides tuberculata
M. maculata
Planorbidae Biomphalaria pfeifferi
Bulinus globosus
Lymnaeaidae Lymnaea natalensis
Ampullariidae Pila ampullaceae
5. Aspects of the Geomorphology and Limnology of some mollusc-inhabited freshwater bodies....
DOI: 10.9790/2402-091112029 www.iosrjournals.org 24 | Page
Figure 1 (A-L) shows the linear regression analyses establishing the patterns of the relationships of the
measured physicochemical factors with elevation. The EC, TDS, sulphate, chloride, phosphate phosphorus and
BOD varied slightly with change in elevation. Temperature, alkalinity and nitrate showed a positive
relationship, while hardness, pH and DO showed negative relationships with change in elevation.
(A) (B)
(C) (D)
(E) (F)
6. Aspects of the Geomorphology and Limnology of some mollusc-inhabited freshwater bodies....
DOI: 10.9790/2402-091112029 www.iosrjournals.org 25 | Page
(G) (H)
(I) (J)
(K) (L)
Figure 1(A-L): The linear regression analyses between measured physico-chemical factors and elevation of
water bodies studied.
The Canonical Correspondence Analysis (CCA) graph (Figure 2) established the relationships between
water bodies and environmental factors. Baga and Alau lakes showed high correlation with increasing TDS and
EC that characterized the water bodies (Figure 2). Sabuwa and Shiroro Reservoirs showed similarities in the
influence of increasing pH and sulphate contents on their species compositions. Phosphorus may be said to be
responsible for determining the species composition in Tiga, Challawa and Zobe Reservoirs. The mollusc
species compositions of Bakolori, Dadin Kowa and A.B.U. reservoirs appeared not to be influenced by the
measured physicochemical factors.
7. Aspects of the Geomorphology and Limnology of some mollusc-inhabited freshwater bodies....
DOI: 10.9790/2402-091112029 www.iosrjournals.org 26 | Page
Key: HB1- Karadua, HB2- Alau, HB3- Tiga, HB4- Zobe, HB5- Chalawa, HB6- Baga, GB1- Gubla, GB2-
Jumare, GB3 – Garkida, GB4 – Dadin Kowa, SB1 – Jibia, SB2 – Bakolori, SB3 – Kainji, KB1 – Mairuwa,
KB2 – Sabuwa, KB3 – River Kaduna, KB4 – Kaya, KB5 - Sabon Birni, KB6 – Sporti, KB7 – Kubani, KB8 -
Kangimi, KB9- ABU, KB10 - Jebba and KB11 – Shiroro.
Figure 2: CCA ordination graph for first and second axes for water bodies and environmental factors.
IV. Discussion
In this study, the gastropods exhibited preference for still or slow-moving waters and extended their
limits to irrigation systems and wetlands mostly utilized as rice field and other farming activities. The bivalves
generally colonized non-turbid waters with a sandy substratum. This niche specialization agrees with
observations by Prabhakar and Roy (2008) tha reported colonization of lentic and wetland habitats by
gastropods while bivalves were found in clear waters buried in sands. The occurrence of bivalves is said to be
indicative of non-polluted water and oxygen-rich habitat and may also be considered as bio-indicators in inland
waters (Prabhakar and Roy, 2008). The elevation of the water bodies’ studied here was variable. Kainji Lake,
the largest of the water bodies, had the lowest elevation (140 meters) while Sabuwa Dam with 669 meters above
sea level had the highest elevation. It was observed that at higher elevations, meandering water channels empty
into deep and wide depressions downstream which serve as collection points in some parts of northern Nigeria.
Wetzel (2001) reported that shallow water basins can originate from processes that caused modest depressions
in the landscape. The tributaries to these depressions have helped to ensure availability of water midway through
the dry season or for most part of the year and therefore served as good habitats for molluscs. Geomorphologic
conditions could therefore be said to also contribute to the factors that affect the diversity of snail species. The
non-homogenous nature of the aquatic habitats in this study could have contributed to the good representation of
different mollusc taxa. The nature of the substrata of the water bodies was predominantly fine sand with mud
that facilitates water retention while certain parts of the substrata were rocky. This made the habitats more
diverse and provided good microhabitats for the anchorage of specialized bivalves like the Etheria elliptica,
thereby increasing the mollusc species diversity of the water bodies. Kurihara et al. (2001) reported that larger
substrates increase habitat heterogeneity by providing microhabitats to support high densities of molluscs. The
water bodies in the study area experience high anthropogenic activities especially during the dry season. The
activities include washing, bathing, fishing, watering points for animals and channeling of water for irrigation.
Such activities often result in decrease in the availability of water and could lead to pollution which affects
aquatic life. The positive linear relationships (simultaneous increase and decrease) between elevation and
8. Aspects of the Geomorphology and Limnology of some mollusc-inhabited freshwater bodies....
DOI: 10.9790/2402-091112029 www.iosrjournals.org 27 | Page
temperature, alkalinity, chloride and nitrate indicate corresponding variations with the different elevation levels.
The negative relationship (inverse increase and decrease) between altitude and pH, hardness and DO signifies
that water bodies on higher elevation had lower values for these environmental variables. Sturm (2007)
observed the influence of altitude on environmental variables such as water temperature, pH, EC, nitrate, DO,
BOD5 and sulphate. The presence of empty shells of freshwater molluscs in the study area could be an
indication of habitat loss due to environmental degradation (desert encroachment and water pollution from
anthropogenic activities) which prolong the mollusc aestivation period and eventually result in death of the
molluscs.
The average mean values of the twelve (12) physicochemical factors of the water bodies measured are
given in Table 2. Water temperature showed wide variation of 22.05 to 36.06o
C, with an average value of
28.14±0.65o
C. The variation in water temperature is mainly related with the temperature of the atmosphere and
weather conditions (Sawyer et al., 1994; APHA, 1998; Adebowale et al., 2008). The pH range in this study
varied from slightly acidic (5.37) to more alkaline (8.71) conditions, with an average of 7.17±0.20. This pH
range could have favoured the occurrence of freshwater molluscs. Kalyoncu et al. (2008) reported pH values of
between 7.84 and 7.38 in streams in Turkey that support a good number of different molluscs. Adebowale et al.
(2008) attributed variation in pH to exposure of water body to atmosphere, biological activities and temperature
changes, in Ondo State Nigeria. Surface runoff and decaying vegetation also produce low pH waters, which can
retard snail growth by increasing the rate of calcium dissolution (Dussart, 1976; Hunter, 1990). The Electrical
Conductivity (EC) and Total Dissolved Solids (TDS) showed wide variations of 0.00 to 318.50 and 0.00 to
159.50, and average values of 69.92ppm and 35.65ppm respectively. The average values of EC and TDS in this
study can be considered low. Kumar and Bahadur (2009) reported higher ranges of 347 to 433 and 525 to 485
respectively. High values of EC and TDS indicate large quantity of dissolved mineral salts (Trivedy and Goyal,
1986) and high turbidity (APHA, 1998) respectively. The mean hardness of the water bodies in this study is
50.86±2.51, which is an indication of very soft water. Eleutheradis and Lazaridou-Dimitriadou (1995) reported
that hardness and pH are the most important factors that both directly and indirectly influence metabolic
activities and thereby growth and abundance of freshwater molluscs. Hardness and pH of water were thought to
be important in influencing mollusc shell calcium. Chatterjee et al. (2008) reported that these two factors not to
have any direct influence on the total shell calcium of the limpet Septaria lineate. Odhiambo and Gichuki (2000)
reported that aside seasonality, alkalinity and pH vary within and between African Lakes, ponds, streams, etc.
The alkalinity of the water bodies in this study showed wide range of values (23.67 to 87.00) with mean value of
44.89±3.86 mg/l. This value is higher than 27.00±0.1and lower than 91- 130 mg/l reported by Hart (2001) and
Kumar and Bahadur (2009) respectively. The wide range of alkalinity of the water bodies in this study may be
indicative of their capacity to withstand acidification. Waters with low alkalinity are very susceptible to changes
in pH while those with high alkalinity have the capacity to resist major shift in pH (Giller and Malmqvist,
1998). Increase in alkalinity values could result from extended dry season period, high evaporations and nature
of substratum (Chindah and Braide, 2004). Water that is low in alkalinity (Calfo, 2005) but high in pH is
generally unsuitable for invertebrates. The average values (1.76±0.18 and 1.19±0.17) of phosphate phosphorus
and nitrate respectively, were high compared to respective values of 0.015±0.00 and 0.17±0.10 reported by Hart
(2001) in Wagendrift Dam South Africa. Phosphorus is obviously an important nutrient that often accelerates
the productivity of fresh waters (Wetzel, 2001). The quantity of phosphorus entering the surface drainage varies
with the amount of phosphorus in soil, topography, vegetative cover, quantity and duration of runoff flow, land
use, and pollution (Wetzel, 2001). Nitrate is an essential nutrient for plants but excessive levels are detrimental.
The sulphate value obtained in this study was considerably high. Sulphate is widely present in natural waters.
Unlike nitrate it is not toxic to aquatic life. The mean high concentration of chloride (52.12±9.89 mg/l) in this
study could be as a result of the utilization of the water bodies as main source of drinking for predominantly
cattle, goats and sheep. Chloride is the most common inorganic ion in water and is very dangerous to vegetation
in high concentrations. It is usually not dominant in open lake ecosystems (Wetzel, 2001). Zhou and Smith
(2002) reported that man and animals excrete high quantities of chloride and therefore high concentration is an
indication of sewage contamination. The low Biochemical Oxygen Demand (BOD) of the water bodies may be
indicative of organic pollution. Other important factors influencing BOD include types of microorganisms, pH,
presence of toxins, some reduced mineral matter and nitrification process (Kumar and Bahadur, 2009). The
average DO of 5.48±0.31 (mg/l) of the water bodies obtained in this study is an indication of good habitats for
molluscs. Studies have shown that proper dissolved oxygen (DO) levels are essential for aquatic ecosystems.
Mean DO values of 5.65 and higher were reported to support high diversity of molluscs in stream waters
(Kalyoncu et al., 2008). The DO value of 5.00 mg/l or greater has been considered good for healthy growth in
fish. Low DO may be as a result from mild pollution or seasonal transition of water. Chindah and Braide (2004)
reported that a sudden and gradual depletion of dissolved oxygen can cause major shifts in the kinds of aquatic
organisms; from pollution intolerant species to pollution tolerant species.
9. Aspects of the Geomorphology and Limnology of some mollusc-inhabited freshwater bodies....
DOI: 10.9790/2402-091112029 www.iosrjournals.org 28 | Page
Despite the relative small sizes of some of the water bodies they contain quite as high diversity of
indigenous species as the large water bodies and can be therefore targets for conservation initiatives. The high
alkalinity values of the water bodies is an indication that the aquatic system has high capacity to withstand
acidification, which could result from indiscriminate discharge of inorganic waste, agricultural waste and
industrial effluents. Unlike the surface area of the water bodies, temperature, pH, dissolved oxygen, alkalinity,
hardness, phosphate phosphorus and sulphate were the important factors that significantly influenced the
distribution of a number of aquatic molluscs in northern Nigeria.
Acknowledgements
The authors express profound gratitude to all the field assistants for their determination and perseverance during
the sampling period.
References
[1]. Abellan, P., Sanchez-Fernandez, D., Velasco, J., Millan, A. (2005). Assessing conservation priorities for insects: status of water
beetles in southeast Spain. Biological Conservation, 121: 79-90.
[2]. Abramovitz, J.N. (1996). Imperiled waters, impoverished future: The decline of freshwater ecosystems. Worldwatch Paper 128.
Worldwatch Insitute, Washington DC.
[3]. Adebowale, K.O., Agunbiade, F.O. and Olu-Olawolabi, B.I. (2008). Impacts of natural and anthropogenic multiple sources of
pollution on the environmental conditions of Ondo State Coastal Water, Nigeria. Electronic Journal of Environmental, Agricultural
and Food Chemistry, 7(4): 2797-2811.
[4]. Allan, J.D. and Flecker, A.S. (1993). Biodiversity conservation in running waters. BioScience, 43: 32–43.
[5]. American Public Health Association (APHA) (1998). Standard methods for examination of
[6]. water and wastewater. 20th
Edition. Published by American Water Works Association/ Water Environmental Federation,
Washington D.C. 2462pp.
[7]. Araoye, P.A. (2002). Man-made lakes, ecological studies and conservation needs in Nigeria. Revista De Biologia Tropica, 50: 857-
864.
[8]. Barney, W. (2000). Taxonomy of the Phylum Mollusca. http.//www.ucmp.berkeley.edu. mologis/subscribe.html.
[9]. Bidwell, A. and Clarke, N.V. (1997). The invertebrate fauna of Lake Kainji, Nigeria. Nigerian Field, 42: 104-110.
[10]. Biney, C.A. (1990). A review of some characteristics of freshwater and coastal ecosystem in Ghana. Hydrobiologia, 208: 45-53.
[11]. Burch, J.B. (1989). North American Freshwater Snails. Malacological Publications. Hamburg, Michigan. 365pp.
[12]. Calfo, A. (2005). Book of coral propagation, alkalinity: The buffering ability of seawater. Readind Tree Publication, USA. Pp31.
[13]. Carmouze, J.P., Durand, J.R. and Leveque, C. (1983). Lake Chad: Ecology and productivity of a shallow tropical ecosystem.
Monograph in Biology, 53: 22.
[14]. Chatterjee, A., Jain, M., Roy, U.S. and Kumar, M.S. (2008). Limnochemical factors influencing the seasonal population density,
secondary production and Calcium-to-Tissues ratio in the freshwater limpet Septaria lineata (Archaeogastropoda: neritidae).
Turkish Journal of Zoology, 32: 2.
[15]. Chindah, A.C. and Braide, S.A. (2004). The Physicochemical quality and Phytoplankton community of tropical waters: A case of 4
Biotopes in the lower Bonny River, Niger Delta, Nigeria. Caderno de Pesquisa serie Biologi, 16(2): 7-35.
[16]. Clements, R., Koh, L.P., Lee, T.M., Meier, R. and Li, D. (2006). Importance of reservoirs for the conservation of freshwater
molluscs in a tropical urban landscape. ELSEVIER Biological Conservation, 128: 136-146.
[17]. Dillon, R.T. Jr. (2000). The Ecology of Freshwater Molluscs. Cambridge University Press, Cambridge. U.K. 509pp.
[18]. Duncan, J.R. and Lockwood, J.L. (2001). Extinction in a field of bullets: A search for causes in the decline of the world’s
freshwater fishes. Biological Conservation, 102: 97–105.
[19]. Dussart, G.B.J. (1976). The ecology of freshwater molluscs in North-West England in relation to water chemistry. Journal of
Molluscan Studies, 42:181-198.
[20]. Eleutheradis, N. and Lazaridou-Dimitriadou, M. (1995). Density and growth of freshwater
[21]. snails Bithynia graeca and Viviparus contectus in relation to water chemistry in Serres, Northern Greece. Journal of Molluscan
Studies, 61: 347-352.
[22]. Giller, P.S. and Malmqvist, B. (1998). The biology of streams and rivers. Oxford University Press. Pp 111-115.
[23]. Green, A.J., El Hamzaoui, M., El Agbani, M.A., Franchimont, J., (2002). The conservation status of Moroccan wetlands with
particular reference to waterbirds and to changes since 1978. Biological Conservation, 104: 71-82.
[24]. Happold, D.C.D. (1987). The Mammals of Nigeria. Clerendon Press, Oxford. Pp 7-8.
[25]. Hart, C.H. (2001). A baseline limnolgical study of Wagendrift dam (Thukela basin, KwaZulu-Natal). Water SA. 27(4): 507-516.
[26]. Holden, M.J. and Green, J. (1960). The hydrology and plankton of River Sokoto. Journal of Animal Ecology, 29: 165-184.
[27]. Hunter, R. (1990). Effects of low pH and low calcium concentration on the pulmonate snail Planorbella trivolvis: A laboratory
study. Canadian Journal of Zoology, 68: 1578-1583
[28]. Ita, E.O. (1993). Inland Fishery Resources of Nigeria. Food and Agricultural Organization: Corporate Document Repository, Rome.
CIFA Occassional Paper, Number 20.
[29]. Kalyoncu, H., Barlas, M., Yildirim, M. and Yorulmaz, B. (2008). Gastropods of two important streams of Gokova bay (Mugla,
Turkey) and their relationships with water quality. International Journal of Science and Technology, 3(1): 27-36.
[30]. Kohl, M. (2006). Freshwater molluscan shells. Http://members.a01.com/mkohl1/ References. html.
[31]. Kumar, A. and Bahadur, Y. (2009). Physico-chemical studies on the pollution potential of River Kosi at Rampur India. World
Journal of Agricultural Sciences, 5(1): 1-4.
[32]. Kurihara, T., Kosuge, T., Kobayashi, M., Katoh, M., and Mito, K. (2001). Spatial and temporal fluctuations in densities of
gastropods and bivalves on subtropical cobbled shores. Bulletin of Marine Science, 68: 409–426.
[33]. Master, L.L., Flack, S.R.and Stein, B.A. (1998). Rivers of Life: Critical watersheds for protecting freshwater biodiversity. The
Nature Conservancy, Arlington, Virginia. 785pp.
[34]. Odhiambo, W. and Gichuki, J. (2000). Seasonal dynamics of the phytoplankton community in relation to environment in Lake
Baringo, Kenya (impact on the Lake’s resource management). African Journal of Tropical Hydrobiology and Fisheries, 9(1 & 2): 1-
16.
10. Aspects of the Geomorphology and Limnology of some mollusc-inhabited freshwater bodies....
DOI: 10.9790/2402-091112029 www.iosrjournals.org 29 | Page
[35]. Perez-Losada, M., Jara, C.G., Bond-Buckup, G. and Crandall, K.A., (2002). Conservation phylogenetics of Chilean freshwater
crabs Aegla (Anomura, Aeglidae): Assigning priorities for aquatic habitat protection. Biological Conservation, 105: 345-353.
[36]. Prabhakar, A.K. and Roy, S.P. (2008). Taxonomic diversity of shell fishes of Kosi region of north-Bihar (India). International
Biannual Journal of Environmental Sciences, 2(2): 149-156.
[37]. Sawyer, C.N., McCarty, P.L. and Parkin, G.F. (1994). Chemistry for environmental engineering. McGraw Hill Publication,
NewYork.
[38]. Segers, N., Nwandiro, C.S. and Dumont, H.J. (1992). Rotifers of some lakes in the flood plain of the River Niger: Faunal
composition and diversity. Hydrobiologia, 250: 63-71.
[39]. Sturm, R. (2007). Freshwater molluscs in mountain lakes of the Eastern Alps (Austria): relationship between environmental
variables and lake colonization. Journal of Limnology, 66 (2): 160-169.
[40]. Thompson, F.G. (2004). Identification manual for the freshwater snails of Florida. University of Florida Gainesville, Florida. Pp 16-
125.
[41]. Trivedy, R.K. and Goyal, P.K. (1986). Chemical and biological methods for water pollution studies. Enviro-Media Karad: 3(34):
36-96.
[42]. Wetzel, R.G. (1992). Clean water: A fading resources. Hydrobiologia, 243(244): 21-30.
[43]. Wetzel, R.G. (2001). Limnology: Lake and River Ecosystems (3rd
edition). Academic Press, California USA. Pp 251-330.
[44]. Zhou, H. and Smith, D.W. (2002). Advanced treatment technologies in water and wastewater treatment. Journal of Environmental
Engineering and Science, 1(4): 247-264.