Community ecology is the study of interactions between populations of different species within a defined area. A community consists of producers, consumers, and decomposers at various trophic levels. Species diversity and dominance characterize communities. Dominant species exert more influence over energy flow and physical structure. Communities develop through successional changes over time, eventually reaching a climax community. Stratification describes the vertical layering of communities according to plant height, while horizontal stratification refers to dispersion patterns of individuals across an area. Ecotones are transition zones between two communities that contain characteristics of both.
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.
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.
Points on biomes,habitat,ecotone and their differentations.
also on terrestrial ,wetland,fresh water,marine habitat and their types .Explained much with pictures..so easy to remember and to take class .Hope this may help....
Energy Flow in Environment : Ecological EnergeticsKamlesh Patel
What is Energy:
The ability or capacity to do work,
Radiant, Chemical, thermal, mechanical, nuclear, electrical.
What is Energy Flow:
The existence of flora and fauna in ecosystem depends upon the cycle of minerals and flow of energy. Energy is needed for all the biotic activities. The only source of this energy is the sun. The entrance, transformation and diffusion of energy in ecosystem are governed by laws of thermodynamics.
you will learn about the primary and secondary productivity involved in ecosystem and about its types. it includes gross and net primary productivity also.
Points on biomes,habitat,ecotone and their differentations.
also on terrestrial ,wetland,fresh water,marine habitat and their types .Explained much with pictures..so easy to remember and to take class .Hope this may help....
Energy Flow in Environment : Ecological EnergeticsKamlesh Patel
What is Energy:
The ability or capacity to do work,
Radiant, Chemical, thermal, mechanical, nuclear, electrical.
What is Energy Flow:
The existence of flora and fauna in ecosystem depends upon the cycle of minerals and flow of energy. Energy is needed for all the biotic activities. The only source of this energy is the sun. The entrance, transformation and diffusion of energy in ecosystem are governed by laws of thermodynamics.
you will learn about the primary and secondary productivity involved in ecosystem and about its types. it includes gross and net primary productivity also.
A community is a complex group of individuals interacting and sharing an environment.
Communities can be characterized by their structure (the types and numbers of species present) and dynamics (how communities change over time).
ECOSYSTEM AND BIODIVERSITY (SCIENCE TECHNOLOGY AND SOCIETY)enahmarizbfrancisco
Ecosystem: a natural environment which includes the flora (plants) and fauna (animals) that live and interact within that environment. Biodiversity: the variety of natural life and habitats on Earth.
introduction to biodiversity, types or levels of biodiversity. the definition of biodiversity, types- genetic diversity, species diversity, ecosystem diversity and functional diversity with examples
Peptide vaccine containing only epitopes capable of inducing positive, desirable T cell and B cell mediated immune response.
Peptides‖ used in these vaccines are 20–30 amino acid sequences that are synthesized to form an immunogenic peptide molecule representing the specific epitope of an antigen.
sufficient for activation of the appropriate cellular and humoral responses
Eliminating allergenic and/or reactogenic responses.
The different types of external stresses that influence the plant growth and development.
These stresses are grouped based on their characters
Biotic
Abiotic
Almost all the stresses, either directly or indirectly, lead to the production of reactive oxygen species (ROS) that create oxidative stress in plants.
This damages the cellular constituents of plants which are associated with a reduction in plant yield.
Bioreactors are devices in which biological or biochemical processes develop under a closely monitored and tightly controlled environment. Bioreactors have been used in animal cell culture since the 1980s in order to produce vaccines and other drugs and to culture large cell populations. Bioreactors for use in tissue engineering have progressed from such devices.
A tissue engineering bioreactor can be defined as a device that uses mechanical means to influence biological processes. In tissue engineering, this generally means that bioreactors are used to stimulate cells and encourage them to produce extracellular matrix (ECM). There are numerous types of bioreactor which can be classified by the means they use to stimulate cells.
Microgravity is the condition in which people or objects appear to be weightless (In space). Astronauts and cosmonauts returning from long-term space missions exhibited various health problems, among them changes of the immune system, bone loss, muscle atrophy, ocular problems, and cardiovascular changes. Space biologists investigated various cell types in space to find the molecular mechanisms responsible for the observed immune disorders. Experimental cell research studying three-dimensional (3D) tissues in space and on Earth using new techniques to simulate microgravity is currently a hot topic in Gravitational Biology and Biomedicine.
An idea was considered as to producing an entire organ in vivo by bypassing many of the steps like cell isolation and expansion, culturing in bioreactors, scaffolds and growth factor delivery ect. involved in traditional tissue engineering. This concept was called the in vivo bioreactor (IVB).
Biomaterials were defined as “any substance, other than a drug, or a combination of substances, synthetic or natural in origin, which can be used for any period of time, as a whole or as a part of a system, which treats, augments or replaces any tissue, organ or function of the body”
Hematopoiesis is the process through which the body manufactures blood cells. It begins early in the development of an embryo, well before birth, and continues for the life of an individual. Hematopoiesis begins during the first weeks of embryonic development. All blood cells and plasma develop from a stem cell that can develop into any other cell.
Characterization and the Kinetics of drying at the drying oven and with micro...Open Access Research Paper
The objective of this work is to contribute to valorization de Nephelium lappaceum by the characterization of kinetics of drying of seeds of Nephelium lappaceum. The seeds were dehydrated until a constant mass respectively in a drying oven and a microwawe oven. The temperatures and the powers of drying are respectively: 50, 60 and 70°C and 140, 280 and 420 W. The results show that the curves of drying of seeds of Nephelium lappaceum do not present a phase of constant kinetics. The coefficients of diffusion vary between 2.09.10-8 to 2.98. 10-8m-2/s in the interval of 50°C at 70°C and between 4.83×10-07 at 9.04×10-07 m-8/s for the powers going of 140 W with 420 W the relation between Arrhenius and a value of energy of activation of 16.49 kJ. mol-1 expressed the effect of the temperature on effective diffusivity.
Artificial Reefs by Kuddle Life Foundation - May 2024punit537210
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.
One of the key areas we work in is Artificial Reefs. This presentation captures our journey so far and our learnings. We hope you get as excited about marine conservation and artificial reefs as we are.
Please visit our website: https://kuddlelife.org
Our Instagram channel:
@kuddlelifefoundation
Our Linkedin Page:
https://www.linkedin.com/company/kuddlelifefoundation/
and write to us if you have any questions:
info@kuddlelife.org
Diabetes is a rapidly and serious health problem in Pakistan. This chronic condition is associated with serious long-term complications, including higher risk of heart disease and stroke. Aggressive treatment of hypertension and hyperlipideamia can result in a substantial reduction in cardiovascular events in patients with diabetes 1. Consequently pharmacist-led diabetes cardiovascular risk (DCVR) clinics have been established in both primary and secondary care sites in NHS Lothian during the past five years. An audit of the pharmaceutical care delivery at the clinics was conducted in order to evaluate practice and to standardize the pharmacists’ documentation of outcomes. Pharmaceutical care issues (PCI) and patient details were collected both prospectively and retrospectively from three DCVR clinics. The PCI`s were categorized according to a triangularised system consisting of multiple categories. These were ‘checks’, ‘changes’ (‘change in drug therapy process’ and ‘change in drug therapy’), ‘drug therapy problems’ and ‘quality assurance descriptors’ (‘timer perspective’ and ‘degree of change’). A verified medication assessment tool (MAT) for patients with chronic cardiovascular disease was applied to the patients from one of the clinics. The tool was used to quantify PCI`s and pharmacist actions that were centered on implementing or enforcing clinical guideline standards. A database was developed to be used as an assessment tool and to standardize the documentation of achievement of outcomes. Feedback on the audit of the pharmaceutical care delivery and the database was received from the DCVR clinic pharmacist at a focus group meeting.
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.
Micro RNA genes and their likely influence in rice (Oryza sativa L.) dynamic ...Open Access Research Paper
Micro RNAs (miRNAs) are small non-coding RNAs molecules having approximately 18-25 nucleotides, they are present in both plants and animals genomes. MiRNAs have diverse spatial expression patterns and regulate various developmental metabolisms, stress responses and other physiological processes. The dynamic gene expression playing major roles in phenotypic differences in organisms are believed to be controlled by miRNAs. Mutations in regions of regulatory factors, such as miRNA genes or transcription factors (TF) necessitated by dynamic environmental factors or pathogen infections, have tremendous effects on structure and expression of genes. The resultant novel gene products presents potential explanations for constant evolving desirable traits that have long been bred using conventional means, biotechnology or genetic engineering. Rice grain quality, yield, disease tolerance, climate-resilience and palatability properties are not exceptional to miRN Asmutations effects. There are new insights courtesy of high-throughput sequencing and improved proteomic techniques that organisms’ complexity and adaptations are highly contributed by miRNAs containing regulatory networks. This article aims to expound on how rice miRNAs could be driving evolution of traits and highlight the latest miRNA research progress. Moreover, the review accentuates miRNAs grey areas to be addressed and gives recommendations for further studies.
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.
"Understanding the Carbon Cycle: Processes, Human Impacts, and Strategies for...MMariSelvam4
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.
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.
Follow us on: Pinterest
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
Willie Nelson Net Worth: A Journey Through Music, Movies, and Business Ventures
Community ecology
1. Community ecology
Definition:
A community is a set of organisms coexisting within a defined area.
• A group of population living in a unit area
• Community ecology is the study of co-existing, interdependent
populations
Community ecology is the study of the interactions between these
organisms, and the interactions between the organisms and their
environment.
Types of Communities:
Kendeigh (1974) divided the biotic com-munity into two types
Major communities
Minor communities
Major community
It is a large, self-sustaining and independent unit
Eg:- coral reefs, rocky community, mangroves etc.
Minor community
It is smaller, not self-sustaining and dependent on other communities for
growth and survival but it is found in major community
Example - Barnacles, Oysters, Algae, Polychaetes present rocky
shores.
Characteristics of a community:
2. The characteristics by which a community is designated are as follows
1) Species Diversity
A biotic community has producer, consumer & decomposer. Within these
species diversities, some populations exert more influence than others in
the community because the share a higher % of energy flow.
2) Growth & Structure
Community is usually described in term of growth forms. The growth form
is the general appearance of plant. These growth forms are directly
influenced by environmental factors.
3) Dominance
In each community, one or a few species dominate either in numbers or in
physical characteristics or both over the other species.
The dominant species are called ECOLOGICAL DOMINANTS.
4) Successions
Successionis very important in development of community. Community
develops as a result of directional change in it with time.
5) Trophic levels
There are 3 broad trophic levels in a community which are Producers,
Consumers & Decomposers. The food produced by the green plants is
consumed directly or indirectly by all kinds of animals. So these are known
as Consumers.
The dead bodies & excreta of both producers & consumers are decomposed
by microbes into simple substances, these are called the Decomposers of
the community
3. Stratification in the field of ecology refers to the vertical layering of
a habitat
The arrangement of vegetation in layers.
It classifies the layers of vegetation largely according to the different
heights to which their plants grow.
The individual layers are occupied by different animal and
plant communities (stratozones).
Types of Stratification:
1. Vertical stratification
2. Horizontal stratification
Vertical stratification:
It refers to the vertical distribution of organisms in a community.
Vertical stratification is found in forestcommunity, grassland
community and aquatic communities.
Eg: forest community
A forest is formed of five layers.
4. Sunlight is the main cause behind the development of vertical stratification.
STRATIFICATION in FOREST COMMUNITY- A forest community shows
5 vertical strata:
1) Subterranean Strata- Basal portion, covered by litter & debris of plants as
well as animals.
2) Forest Floor- Secondlayer, abundance of litter. This region is the zone of
decomposition.
3) Stratum of Herbaceous Vegetation- Thirdlayer, formed by herbaceous
plant like grasses, dicotyledonous annuals etc.
4) Stratum of Shrubs- Locatedbelow the crown layer & above the
herbaceous layer, represented by shrubby life form.
5) Stratum of Tree- Topmostlayer, also called CROWN LAYER which
represents highest limit of plant community in given region.
5. Horizontal stratification:
It refers to the distribution of individuals on a horizontal plane in the
community. In a terrestrial community, the individuals may be distributed
on the floor in three ways, namely uniform, clumped and random.
The spatial distribution of individuals within the population
Three types:
Clumped Dispersion
Even Dispersion
Random Dispersion
Clumped Dispersion
Individuals are clustered together
Occurs:
When resources (food, water, living spaces) are clumped together
Species have a certain social behavior
For example: herding animals, flocks of birds, schools of fish,
hives of bees
Even Dispersion (a.k.aUniform Dispersion)
Individuals are separated by a fairly even distance.
Occurs:
As a result of social interaction
Individuals trying to get as far away from each other as
possible.
Limited resources, competition, nesting
6. Random Dispersion
Location of one individual is independent of the location of the other
individuals
Examples:
Seed dispersal by the wind or animals
ECOLOGICAL DOMINANCE
• The ecological dominance is also known as the dominant species
• It refers to the most of population in a climax community
• Ecological dominance is the degree to which a species is more
numerous than its competitors in an ecological community or makes
up more of the biomass
• Most ecological communities are defined by their dominant species
• In tropical coastal waters the dominant corals
7. • In temperate bogs, the dominant vegetation is usually species
of Sphagnum moss.
• On earth, a large amount of its land ecosystems are dominated
by human beings, making human beings the ecologically dominant
species over much of the planet.
• Tidal swamps in the tropics are usually dominated by species of
mangrove (Rhizophoraceae)
• Some sea floor communities are dominated by brittle stars.
• Exposed rocky shorelines are dominated by sessile organisms such
as barnacles and limpets.
Community dominance
• A community has many species, of which one or few species play
dominant role in the community by virtue of their number, size and
activities such species are called ‘Community dominance’
• The removal of community dominant from the community affects
the community drastically
• Species structurein most communities is either abundant or rare
• Few spices that are abundant
• Large number species that are rare
• The abundant species are called dominants. Eg. The mussel bed in
the rocky shore –Mytilus sp
Ecotone and edge effect
• Ecotone is the intermediate zone lying between two adjacent
communities
8. Eg. An estuary is an ecotone lying between river and sea
Characteristics of ecotone
• The ecotone prevails environmental conditions intermediate to both
two adjacent communities
• The ecotone offers an abundance of food and shelter
• It contain organisms of both community
• As a rule ecotone contains more species often denser population than
either of the neighbouring communities. This is called edge effect
• The ecotone contain certain species which are completely restricted to
this region and they are called edge species
• The ecotone may be as broad as 100 km. or as narrow as 1 .0 km.
Ecological niche
• Niche refers to the functional status of an organism in its community
• According to Odum niche is the Professionof an organism in the
community
• Habitat - address and niche – Profession
9. • Niche includes what it eats, how it behaves, how it responds to the
environment and interactions with other organisms in the
community
Ecological niches may be
• Broad niche
• Narrow niche
• Narrow niches - the role or function in the community or ecosystem
has more finely subdivided and the species is specialized
• Specialized species are also called specialists
• Eg:- muddy, sandy , rocky etc.
• Broad niches - the species functions in the community is more of
generalized
• They are either specialists or generalists with referenceto the niche -
Marine or fresh water, estuarine organisms etc.
Ecological succession
10. • The process of development of new communities is called ecological
succession
• “An orderly and progressive replacement of one community by
another till the development of a stable community in that area”
(Smith, 1965).
Characteristics of succession
• The successionis caused due to the modification of the habitat
• The kinds of programs changes continuously with succession
• The diversity of species increases. biomass can also increases
• The first stage of community is ‘pioneer community’ The final stage
of community called ‘climax community’
Types of succession
• Primary succession – Bacteria, Lichens – first community (pioneer) on
rocks – biofilm
• Secondary succession-Attachedof spats of barnacles, oyster,
polychaetes etc. on pioneer communities
• Autotrophic succession - Dominance of algae.
• Heterotrophic succession– Dominance of heterotrophs
Climax community
11. • The terminal and persistent community in an ecosystemis called
climax community.
Animal are broadly grouped
into
• R- selected species
• K-selected species
R-Strategists
Think “R” for “reproduction”
Population usually NOT
near carrying capacity
J-curve growth (high growth
rate)
Exponential Growth
Highly affected by abiotic
factors like weather
Small body size and short
life span
Have many offspring in a
short time
K-Strategists
Think “K” for “carrying capacity”
Population lives near its carrying capacity
S-Curve Growth
Logistic Growth
12. Highly affected by biotic factors like competition
Usually large body size
Have few offspring, but live a long time
Ecotone:
An ecotone is a zoneof junction or atransition areabetweentwo biomes
[diverse ecosystems]. It is where two communities meet and integrate.
For e.g. the mangrove forestsrepresentan ecotone between marine and
terrestrial ecosystem. Other examples are grassland (betweenforestand
desert), estuary (between fresh water and salt water) and river bank or
marsh land (between dry and wet).
Characteristics of Ecotone
It may be narrow(between grasslandand forest)or wide (between forest
and desert).
13. As it is a zone of transition, it has conditions intermediate to the adjacent
ecosystems. Hence it is a zone of tension.
Usually, the number and the population density of the species of an
outgoing community decreases as we move away from community or
ecosystem.
A well-developed ecotones contain some organisms which are entirely
different from that of the adjoining communities.
Edge Effect – Edge Species
In ecology, edge effects refer to the changes in population or
community structures that occur at the boundary of two habitats
(ecotone).
Sometimes the number of species and the population density of some of
the species in the ecotone is much greater than either community. This
is called edge effect.
The organisms which occur primarily or most abundantly in this zone
are known as edge species.
In the terrestrial ecosystems edgeeffect is especially applicable to birds.
For example the density of birds is greater in the mixed habitat of the
ecotone between the forest and the desert.
Ecological Niche
14. Niche refers to the unique functional role and position of a speciesin
its habitat or ecosystem.
In nature, many species occupy the same habitat but they perform
different functions.
The functional characteristics of a species in its habitat is referredto as
“niche” in that common habitat.
Habitat of a species is like its ‘address’ (i.e. where it lives) whereas niche
can be thought of as its “profession” (i.e. activities and responses specific
to the species).
A niche is unique for a species while many species share the habitat. No
two species in a habitat can have the same niche. This is because of
the competition with one another until one is displaced.
For example, a large number of differentspecies of insects may be pests
of the same plant but they can co-exist as they feed on different parts of
the same plant.
15. A species’ niche includes all of its interactions with the biotic and abiotic
factors of its environment [habitat niche – where it lives, food niche –
what is eats or decomposes & what species it competes with,
reproductive niche – how and when it reproduces, physical & chemical
niche – temperature, land shape, land slope, humidity & other
requirement].
An ecological niche describes how an organism or population responds
to the distribution of resources and competitors (for example, by
growing when resources are abundant, and when predators, parasites
and pathogens are scarce) and how it in turn alters those same factors
(for example, limiting access to resources by other organisms, acting as
a food source for predators and a consumer of prey).
Niche plays an important role in conservation of organisms.If we have
to conservespecies in its native habitat we should have knowledge about
the niche requirements of the species and should ensure that all
requirements of its niche are fulfilled.