The equation 1-∑Pi2 represents (1) Shannon weaver index (2) Simpson index (3) Brillouin index (4) Hills equation Biodiversity is a critical indicator of ecosystem health, and ecologists use various mathematical […]
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CSIR NET Life Science Previous Year Questions and Solution on Community Ecology
Which Biodiversity Index Does Not Show Relative Abundance of Species?
Which of the following index does not show relative abundance of species (1) Shannon-weaver index (2) Simpson Index (3) Brillouin index (4) Species richness Understanding Relative Abundance in Biodiversity Indices […]
CSIR NET Life Science Previous Year Questions and Solution on Community Ecology
Comparing Evenness in Plant Communities: How to Interpret Species Abundance Data
Four different plant communities that consisted of the same number of species were taken up for a species diversity study. The following table represents some of the outcomes: Select the […]
CSIR NET Life Science Previous Year Questions and Solution on Community Ecology
Simpson’s Index of Diversity: Formula, Interpretation, and Ecological Importance
The probability of capturing an individual of certain species is Pi, then total biodiversity according to Simpson’s Index of Diversity can be represented as (1) ∑(Pi)2 (2) 1- ∑(Pi)2 (3) […]
CSIR NET Life Science Previous Year Questions and Solution on Ecology
What Favors the Evolution of Fewer, Larger Offspring? Parental Care and Predator Pressure in Life History Trade-Offs
In life history evolution there is generally a tradeoff between the size and number of offsprings produced. Some conditions are listed below: A. Scarcity of food during the early stages […]
CSIR NET Life Science Previous Year Questions and Solution on Community Ecology
Understanding the Shannon Index: A Comprehensive Measure of Biodiversity and Evenness
Shannon index is measure of— (1) Biodiversity evenness (2) Population (3) Pollution (4) Speciation Biodiversity is a cornerstone of healthy ecosystems, reflecting the variety and balance of species within a […]
CSIR NET Life Science Previous Year Questions and Solution on Ecology
Trade-Offs in Life History Evolution: Seed Size Versus Seed Number as a Classic Example
Which one of the following statements supports the concepts of trade-off in the evolution of life history trades (1) Level of parental care and clutch size are positively correlated (2) […]
CSIR NET Life Science Previous Year Questions and Solution on Community Ecology
How Changes in Alpha Diversity Affect Beta Diversity When Gamma Diversity Is Constant
If α-diversity is diversity of pathogen per host and β-diversity is diversity of pathogen between the two host and ɣ-diversity is overall diversity. If ɣ-diversity is constant and α- diversity […]
CSIR NET Life Science Previous Year Questions and Solution on Ecology
Reproductive Strategies of Big Trees in Forests: Delayed Reproduction and Fewer, Larger Seeds
The most important reproductive strategies of big trees in a forest are (1) earlier age at first reproduction and production of a large number of small seeds. (2) earlier age […]
CSIR NET Life Science Previous Year Questions and Solution on Community Ecology
Beta Diversity: Understanding Species Turnover Between Geographical Regions
As we move from one geographical region to next neighbouring region, species diversity tends to change. It is termed as (1) α-Diversity (2) β-Diversity (3) γ-Diversity (4) δ-Diversity Biodiversity is […]
