---
title: "Species Diversity — AP Bio Definition & Exam Guide"
description: "Species diversity measures the variety and evenness of species in a community, the key to ecosystem resilience and a guaranteed Simpson's Index calculation on AP Bio."
canonical: "https://fiveable.me/ap-bio/key-terms/species-diversity"
type: "key-term"
subject: "AP Biology"
---

# Species Diversity — AP Bio Definition & Exam Guide

## Definition

Species diversity refers to the variety of different species within a specific area or ecosystem.

## Related Study Guides

- [8.5 Community Ecology](/ap-bio/unit-8/community-ecology/study-guide/GhiVt7Egu8crmrHtQXXc)
- [8.6 Biodiversity](/ap-bio/unit-8/biodiversity/study-guide/UQxfkl91v4pCcoar2qMD)

## Review

### Related Terms

- [Biodiversity](/ap-bio/key-terms/biodiversity): This is the variety of life in the world or in a particular habitat or ecosystem.
- [Genetic Diversity](/ap-bio/key-terms/genetic-diversity): This refers to the total number of genetic characteristics in the genetic makeup of a species.
- Ecosystem Diversity: This is the variety of habitats, living communities, and ecological processes in the living world.