Biodiversity indices provide mathematical measures of diversity in communities. They quantify species richness, evenness, dominance, and incorporate both the number of species and their abundances. Common indices include Simpson's index, Shannon-Wiener index, and Evenness index. They are used to measure diversity at different spatial scales like alpha, beta, and gamma diversity. The Index of Biotic Integrity also synthesizes biological data to evaluate biological condition and integrity of aquatic ecosystems based on fish communities and metrics.
Community ecology, study of the organization and functioning of communities, which are assemblages of interacting populations of the species living within a particular area or habitat.
Lecture note on Biodiversity conservationTalemos Seta
Describes about the concept, scope, definition of Biodiversity, threats of biodiversity, centre of Origin/diversity, Biodiversity hotspots, strartegies of BD conservation
Community ecology, study of the organization and functioning of communities, which are assemblages of interacting populations of the species living within a particular area or habitat.
Lecture note on Biodiversity conservationTalemos Seta
Describes about the concept, scope, definition of Biodiversity, threats of biodiversity, centre of Origin/diversity, Biodiversity hotspots, strartegies of BD conservation
Answer (6)THREE WAYS HUMAN HAVE NEGATIVELY IMPACTED BIODIVERSITY .pdfangelsfashion1
Answer (6)
THREE WAYS HUMAN HAVE NEGATIVELY IMPACTED BIODIVERSITY :-
(A) Population:-
Growth of the human population is a major factor affecting the environment. Simply put,
overpopulation means that there are more people than there are resources to meet their needs.
Almost all the environmental problems we face today can be traced back to the increase in
population in the world. The human population is at 6 billion; with an annual global growth rate
of 1.8%, three more people are added to the earth every second.
(B) Habitat Removal and Alteration :-
Habitat fragmentation is the loss and subdivision of a habitat and the corresponding increase in
other habitats in the landscape. Conversion of habitat represents the greatest threat to
biodiversity, since almost all human activities cause alterations to the natural environment to a
greater or lesser degree. Almost 10% of Canada\'s ecoregions are estimated to be at high risk for
loss of biodiversity because of habitat removal.
(C) Overharvesting/Overexploitation :-
Overharvesting has had the greatest effect on biodiversity. In fact, overharvesting and habitat
loss often occur simultaneously, as removal of an organism from its environment can have
irreversible impacts on the environment itself.
Humans have historically exploited plant and animal species in order to maximize short-term
profit, at the expense of sustainability of the species or population. This exploitation follows a
predictable pattern: initially, a species harvested from the wild can turn a substantial profit,
encouraging more people to get involved in its extraction. This increased competition encourages
the development of more large-scale and efficient methods of extraction, which inevitably
deplete the resource.
(D) Pollution :-
Toxic discharges: This includes metals, organic chemicals, and suspended sediments usually
found in industrial and municipal effluents that are discharged directly into waterbodies. Toxic
discharges can inversely impact the biota (living organisms) in an ecosystem by killing them,
weakening them, or affecting their ability to carry out essential biological functions (feeding,
reproducing, etc.).
bacterial contamination: For example, fecal coliforms that come from human waste are found in
municipal effluent discharges. Potable water is treated to destroy fecal coliforms which can make
people ill if ingested.
nutrient buildup: Most concern are phosphorus and nitrogen which often originate as run-off
from fertilizers applied on agricultural fields. These nutrients, naturally present in very low
concentrations, stimulate rapid growth of algae and aquatic plants, ultimately limiting the amount
of oxygen and light available to other organisms in the ecosystem. As well, aquatic environments
can be degraded by habitat alteration and presence of invasive species.
Answer (7);
SPECIES DIVERSITY
This refers to the variety of species within a particular region. The number of species in a region
is a measure for such.
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Whittaker (1972)
Alpha, Beta and gamma diversity
Status of Global Biodiversity
Ecological Diversity
Species Diversity
Genetic Diversity
Global Food Security
Medicinal Resources
Gene Resources
Supporting Services
Soil formation &
protection
Nutrient cycling
Primary production
Regulating Services
Water regulation
Climate regulation
Disease regulation
Water purification
Pollination
Biodiversity is the degree of variation of life. This can refer to genetic variation, species variation, or ecosystem variation. Biologists most often define biodiversity as the "totality of genes, species, and ecosystems of a region".
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Situated in Pondicherry, India, Kuddle Life Foundation is a charitable, non-profit and non-governmental organization (NGO) dedicated to improving the living standards of coastal communities and simultaneously placing a strong emphasis on the protection of marine ecosystems.
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Willie Nelson Net Worth: A Journey Through Music, Movies, and Business Venturesgreendigital
Willie Nelson is a name that resonates within the world of music and entertainment. Known for his unique voice, and masterful guitar skills. and an extraordinary career spanning several decades. Nelson has become a legend in the country music scene. But, his influence extends far beyond the realm of music. with ventures in acting, writing, activism, and business. This comprehensive article delves into Willie Nelson net worth. exploring the various facets of his career that have contributed to his large fortune.
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Introduction
Willie Nelson net worth is a testament to his enduring influence and success in many fields. Born on April 29, 1933, in Abbott, Texas. Nelson's journey from a humble beginning to becoming one of the most iconic figures in American music is nothing short of inspirational. His net worth, which estimated to be around $25 million as of 2024. reflects a career that is as diverse as it is prolific.
Early Life and Musical Beginnings
Humble Origins
Willie Hugh Nelson was born during the Great Depression. a time of significant economic hardship in the United States. Raised by his grandparents. Nelson found solace and inspiration in music from an early age. His grandmother taught him to play the guitar. setting the stage for what would become an illustrious career.
First Steps in Music
Nelson's initial foray into the music industry was fraught with challenges. He moved to Nashville, Tennessee, to pursue his dreams, but success did not come . Working as a songwriter, Nelson penned hits for other artists. which helped him gain a foothold in the competitive music scene. His songwriting skills contributed to his early earnings. laying the foundation for his net worth.
Rise to Stardom
Breakthrough Albums
The 1970s marked a turning point in Willie Nelson's career. His albums "Shotgun Willie" (1973), "Red Headed Stranger" (1975). and "Stardust" (1978) received critical acclaim and commercial success. These albums not only solidified his position in the country music genre. but also introduced his music to a broader audience. The success of these albums played a crucial role in boosting Willie Nelson net worth.
Iconic Songs
Willie Nelson net worth is also attributed to his extensive catalog of hit songs. Tracks like "Blue Eyes Crying in the Rain," "On the Road Again," and "Always on My Mind" have become timeless classics. These songs have not only earned Nelson large royalties but have also ensured his continued relevance in the music industry.
Acting and Film Career
Hollywood Ventures
In addition to his music career, Willie Nelson has also made a mark in Hollywood. His distinctive personality and on-screen presence have landed him roles in several films and television shows. Notable appearances include roles in "The Electric Horseman" (1979), "Honeysuckle Rose" (1980), and "Barbarosa" (1982). These acting gigs have added a significant amount to Willie Nelson net worth.
Television Appearances
Nelson's char
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A brief about organic farming/ Natural farming/ Zero budget natural farming/ Subash Palekar Natural farming which keeps us and environment safe and healthy. Next gen Agricultural practices of chemical free farming.
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The carbon cycle is a critical component of Earth's environmental system, governing the movement and transformation of carbon through various reservoirs, including the atmosphere, oceans, soil, and living organisms. This complex cycle involves several key processes such as photosynthesis, respiration, decomposition, and carbon sequestration, each contributing to the regulation of carbon levels on the planet.
Human activities, particularly fossil fuel combustion and deforestation, have significantly altered the natural carbon cycle, leading to increased atmospheric carbon dioxide concentrations and driving climate change. Understanding the intricacies of the carbon cycle is essential for assessing the impacts of these changes and developing effective mitigation strategies.
By studying the carbon cycle, scientists can identify carbon sources and sinks, measure carbon fluxes, and predict future trends. This knowledge is crucial for crafting policies aimed at reducing carbon emissions, enhancing carbon storage, and promoting sustainable practices. The carbon cycle's interplay with climate systems, ecosystems, and human activities underscores its importance in maintaining a stable and healthy planet.
In-depth exploration of the carbon cycle reveals the delicate balance required to sustain life and the urgent need to address anthropogenic influences. Through research, education, and policy, we can work towards restoring equilibrium in the carbon cycle and ensuring a sustainable future for generations to come.
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WRI’s brand new “Food Service Playbook for Promoting Sustainable Food Choices” gives food service operators the very latest strategies for creating dining environments that empower consumers to choose sustainable, plant-rich dishes. This research builds off our first guide for food service, now with industry experience and insights from nearly 350 academic trials.
UNDERSTANDING WHAT GREEN WASHING IS!.pdfJulietMogola
Many companies today use green washing to lure the public into thinking they are conserving the environment but in real sense they are doing more harm. There have been such several cases from very big companies here in Kenya and also globally. This ranges from various sectors from manufacturing and goes to consumer products. Educating people on greenwashing will enable people to make better choices based on their analysis and not on what they see on marketing sites.
2. Biodiversity indices
A diversity index is a mathematical measure of species
diversity in a given community.
Based on the species richness (the number of species present)
and species abundance (the number of individuals per species).
These indices are statistical representations of biodiversity in
different aspects (richness, evenness, and dominance).
3. What is biodiversity?
In simplest form, biodiversity is the variety of different types of
organisms present and interacting in an ecosystem.
4. Diversity usually implies a measure of both species number
and ‘equitability’ (or ‘evenness’).
1. Species richness indices
Species richness is a measure for the total number of the
species in a community.
5. 2. Evenness indices:
Evenness expresses how evenly the individuals in a
community are distributed among the different species.
6. Why is biodiversity measured?
It is a measure that combines richness and evenness across
species.
High diversity is synonymous with ecosystem health.
Diverse communities have increased stability, increased
productivity, and resistance to invasion and other disturbances.
7. These three types of indices can be used on different spatial scales
1. Alpha diversity
Alpha diversity refers to diversity within a particular area,
community or ecosystem, and is usually measured by counting
the number of taxa within the ecosystem (usually species
level).
2. Beta diversity
Beta diversity is species diversity between ecosystems; this
involves comparing the number of taxa that are unique to each
of the ecosystems.
8. 3. Gamma diversity
Gamma diversity is a measure of the overall diversity for
different ecosystems within a region.
9. Many different indices of diversity are used
Simpson’s Index
Simpson (1949) developed an index of diversity which is a
measure of probability the less diversity, the greater the
probability that two randomly selected individuals will be the
same species.
In the absence of diversity (1 species), the probability that two
individuals randomly selected will be the same is 1.
10. Index is calculated as follows:
n = the total number of organisms of a particular species
N = the total number of organisms of all species .
The value of D ranges between 0 and 1.
With this index, 1 represents infinite diversity and 0, no
diversity, so the larger the value of D, the lower the diversity.
11. Shannon-Weiner Index
Another widely used index of diversity that also considers
both species richness and evenness is the Shannon-Weiner
Diversity Index.
Originally proposed by Claude Shannon in 1948. It is also
known as Shannon's diversity index.
The index is related to the concept of uncertainty.
12. Index is calculated as follows:
where pi = proportion of individuals of species i , and ln is the
natural logarithm, and S = species richness.
The value of H ranges from 0 to Hmax . Hmax is different for
each community and depends on species richness.
13. Evenness Index
Species evenness refers to how close in numbers each species
in an environment is. So if there are 40 foxes and 1000 dogs,
the community is not very even.
But if there are 40 foxes and 42 dogs, the community is quite
even. The evenness of a community can be represented by
Pielou's evenness index (Pielou 1966).
14. Index is calculated as follows:
J= H/Hmax
The value of J ranges from 0 to 1. Higher values indicate
higher levels of evenness. At maximum evenness, J = 1.
J and D can be used as measures of species dominance in a
community. Low J indicates that 1 or few species dominate the
community.
15. Index of biotic integrity
• An Index of Biological Integrity (IBI) is a synthesis of diverse
biological information which numerically depicts associations
between human influence and biological attributes.
• A scientific tool used to identify and classify water pollution
problems.
• The IBI concept was formulated by Dr. James Karr in 1981.
16. History
Water quality act (1972) stimulated many efforts to monitor
the quality of water resource systems.
It resulted in development of thresholds and criteria levels foe
specific contaminants, often based on acute toxicity tests.
17. “Biotic integrity” is based on the premise that the status of
living organisms provides the most direct and effective
measure of the integrity of water.
The Index of Biotic Integrity (IBI) provides managers with a
technique for evaluating the biological condition of the water
resource.
As the IBI became widely used, different versions were
developed for different regions and ecosystems.
18. Living systems, such as fish used in the IBI, are useful in
measuring degradation for many reasons:
Fish are sensitive to a wide array of stresses.
Fish integrate adverse effects of activities in the watershed.
Fish are long-lived; their populations show effects of
reproductive failure and mortality in many age groups and
therefore provide a long-term record of environmental
stressors.
19. IBI system
• The original version had 12 metrics that reflected fish species
richness 2 and composition, number and abundance of species,
trophic organization and function, reproductive behavior, fish
abundance, and condition of individual fish.
• The metrics were scored and summed to arrive at an index
ranging from 60 (best) to 12 (worst).
20. Example of metrics used to construct an Index of
Biotic Integrity (IBI)
Metric Description
Number of fish species
and individuals
The total number of species and
individuals supported by the
stream will decrease with
environmental degradation
Number of darters Darters are sensitive to
environmental degradation.
Darter habitats may be degraded
as the result of siltation,
channelization, etc.
21. Number of species of sunfish These species are particularly sensitive to
silting in of pools and loss of in-stream cover.
Number of species of suckers Suckers are intolerant of chemical and habitat
degradation and because they are long lived
provide a multiyear perspective
Number of intolerant species Intolerant species are most affected by stream
degradation and therefore would disappear by
the time a stream is rated as ‘fair’.
Percentage of tolerant species Tolerant species are present in moderate
number but become dominant as stream
degrades.
Percentage of diseased fish Skeletal anomalies, fin damage, disease, and
tumors increase with stream degradation.
22. Biotic integrity classes
Class Attributes
Excellent Comparable to the best situations without
influences of man, with most intolerant
forms, full array of age and sex classes,
balanced trophic structure
Good Species richness somewhat below
expectation, loss of most intolerant forms,
trophic structure shows some sign of stress
Fair Sign of additional deterioration include
fewer intolerant forms, more skewed trophic
structure
23. Poor Dominated by omnivores, pollution tolerant
forms and habitat generalists, growth rate
and condition factors commonly depressed,
hybrid and diseased fish often present
Very poor Few fish present, mostly introduced or very
tolerant forms, hybrids common, disease, fin
damage, other anomalies regular
No fish Repetitive sampling fails to turn up any fish
24. Parameters used in assessment of fish communities
Species composition and
richness
• Number of species
• Presence of intolerant
species
• Species richness and
composition of Darters,
Sucker, Sunfish
• Proportion of hybrid
individuals
Ecological factor
• No. of individuals in sample
• Proportion of omnivores
• Proportion of insectivores
• Proportion of top carnivores
• Proportion with disease,
tumor, fin damage other
anomalies
25. References
Biodiversity Indexes: Value and Evaluation Purposes, Jatna
Supriatna, Institute for Sustainable Earth and Resources (I-SER)
and Dept of Biology, Faculty of Math and Sciences, Universitas
Indonesia.
Application of the Index of Biotic Integrity to Evaluate Water
Resource Integrity in Freshwater Ecosystems, Thomas P. Simon
and John Lyons.
Biodiversity indices, Jitendra Kumar, Neeraj Pathak, Ramesh
Kumar Tripathi, Archit Shukla, Saurabh Dubey, College of
Fisheries, Mangalore, College of Fisheries, Veraval, Central
Institute of Fisheries Education, Mumbai, College of
Fisheries, Ludhiana, Punjab.