Sorensen index calculator

Sorensen index calculator can be used to calculate the Sorensen index (also known as the Sørensen similarity index) which is a measure of ecological similarity between two communities or ecosystems.

Input Parameters

Calculation Results

Calculation Formula

Sorensen Index (S) = 2 * C / (a + b)

Where:
C = Number of species common to both communities
a = Total number of species in Community 1
b = Total number of species in Community 2

Sorensen index calculator Calculator Usage Guide

Learn how to use the Sorensen index calculator calculator and its working principles

How to Use the Calculator

  1. Enter the number of species in Community 1, separated by commas (e.g., 10, 20, 30).
  2. Enter the number of species in Community 2, separated by commas (e.g., 15, 25, 35).
  3. Click the "Calculate" button to compute the Sorensen index.
  4. The result will be displayed in the Sorensen Index Result field.

Understanding the Sorensen Index

The Sorensen index is a measure of ecological similarity between two communities. It ranges from 0 to 1, where 1 indicates identical communities and 0 indicates no similarity. The formula for the Sorensen index is:

S = 2C / (a + b)

Where:

  • C is the number of species common to both communities.
  • a is the total number of species in Community 1.
  • b is the total number of species in Community 2.