How to use the berger-parker dominance index calculator
Find how much of a community belongs to its most common species from species counts. Enter counts per species in the field above; the berger-parker dominance index, dominant species share are computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “Berger Parker index”, “dominance index”, “most common species share”, “calculate berger-parker dominance index”, “find berger-parker dominance index”.
Formula
Variables
- n — Counts per species
Worked example
With counts per species = 10,20,5,15, the calculator gives berger-parker dominance index ≈ 0.4; dominant species share ≈ 40 %.
Frequently asked questions
What is the berger-parker dominance index calculator used for?
Find how much of a community belongs to its most common species from species counts. It helps with questions such as “Berger Parker index”, “dominance index”, “most common species share”.
What is the formula for the berger-parker dominance index calculation?
Berger-Parker dominance index = hi(n) / sum(n). Dominant species share (%) = [Berger-Parker dominance index] × 100. Here n is counts per species.
What inputs do I need for the berger-parker dominance index calculator?
You need counts per species. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the berger-parker dominance index calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the berger-parker dominance index result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.