🧬ap biology review

Population Density

Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examWritten by the Fiveable Content Team • Last updated September 2025

Definition

Population density refers to the number of individuals per unit area or volume in an ecological community. It's an important concept in ecology because it influences how organisms interact with each other and their environment.