Shannon Weiner Index Calculator
Introduction
The Shannon-Weiner Index is a widely used measure in ecology to quantify the diversity of a population or community. It takes into account both the richness (number of species) and evenness (distribution of individuals among species). Calculating the Shannon Weiner Index involves a straightforward formula, making it an essential tool for ecologists and researchers.
How to Use
To make the calculation more accessible, we’ve created a simple HTML and JavaScript calculator. Follow the instructions below to utilize the calculator:
- Input the number of individuals for each species in the provided text boxes.
- Click the “Calculate” button to obtain the Shannon-Weiner Index.
Formula
The Shannon-Weiner Index (H) is calculated using the formula:
Where:
- H is the Shannon-Weiner Index.
- S is the total number of species.
- pi is the proportion of individuals in the i th species.
Example Solve
Suppose we have three species with the following number of individuals:
- Species A: 20 individuals
- Species B: 15 individuals
- Species C: 10 individuals
The proportions (pi) are calculated by dividing the number of individuals in each species by the total number of individuals (45 in this case).
Substitute these values into the formula to find H.