Simpson's Diversity Index Calculator
This calculator is designed for ecologists, biologists, and environmental scientists to accurately assess the diversity of a community using Simpson's Diversity Index. It helps in understanding species richness and evenness within an ecosystem.
Simpson's Diversity Index Calculator
Results
Data Source and Methodology
Tutti i calcoli si basano rigorosamente sulle formule e sui dati forniti da Geography Fieldwork.
The Formula Explained
Glossary of Variables
- ni: Number of individuals of species i.
- N: Total number of all individuals in the sample.
- D: Simpson's Diversity Index.
How It Works: A Step-by-Step Example
Consider a community with the following species counts: Species A: 10, Species B: 20, and Species C: 30. The total number of individuals (N) is 60. Using the formula, calculate D to understand the diversity index of this community.
Frequently Asked Questions (FAQ)
What is Simpson's Diversity Index?
Simpson's Diversity Index is a measure of diversity which takes into account both richness and evenness of species in a community.
How is the index interpreted?
The index value ranges between 0 and 1, where 0 indicates no diversity and 1 indicates infinite diversity.
Why use Simpson's Index?
It provides a measure that takes into account both the number of species and the abundance of each species, making it a robust ecological tool.
Formula (LaTeX) + variables + units
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\( D = 1 - \frac{\sum (n_i(n_i - 1))}{N(N - 1)} \)
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- Geography Fieldwork — geographyfieldwork.com · Accessed 2026-01-19
https://geographyfieldwork.com/Simpson'sDiversityIndex.htm
Last code update: 2026-01-19
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