Question:
______ index is used to evaluate the richness of various groups of organisms in a habitat.
______ index is used to evaluate the richness of various groups of organisms in a habitat.
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Margalef's index is highly dependent on sample size, so it is best used when comparing samples of similar size.
Updated On: Jul 28, 2026
- Margalef's
- Shannon-Weiner
- Simpson's
- Pielou's
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
Biodiversity in a habitat has two main components: species richness (the number of different species present) and species evenness (the relative abundance of each species).
Step 2: Detailed Explation:
Let us evaluate the biological indexes:
- Margalef's Richness Index (\(D\)): Calculated as \(D = (S - 1) / \ln(N)\), where \(S\) is the number of species and \(N\) is the total number of individuals.
It is used to measure species richness by normalizing the species count against the sample size.
- Shannon-Weiner Index: Measures overall diversity, incorporating both richness and evenness.
- Simpson's Index: Measures domince and diversity, focusing on the probability that two randomly selected individuals belong to the same species.
- Pielou's Index: Specifically measures evenness, evaluating how equally distributed individuals are among the species.
Thus, Margalef's index is the standard index used specifically to evaluate species richness.
Step 3: Fil Answer:
Margalef's index is used to evaluate species richness in a habitat.
Hence, the correct option is (A).
Biodiversity in a habitat has two main components: species richness (the number of different species present) and species evenness (the relative abundance of each species).
Step 2: Detailed Explation:
Let us evaluate the biological indexes:
- Margalef's Richness Index (\(D\)): Calculated as \(D = (S - 1) / \ln(N)\), where \(S\) is the number of species and \(N\) is the total number of individuals.
It is used to measure species richness by normalizing the species count against the sample size.
- Shannon-Weiner Index: Measures overall diversity, incorporating both richness and evenness.
- Simpson's Index: Measures domince and diversity, focusing on the probability that two randomly selected individuals belong to the same species.
- Pielou's Index: Specifically measures evenness, evaluating how equally distributed individuals are among the species.
Thus, Margalef's index is the standard index used specifically to evaluate species richness.
Step 3: Fil Answer:
Margalef's index is used to evaluate species richness in a habitat.
Hence, the correct option is (A).
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