---
title: "Density-Independent Factors — AP Bio Definition & Exam Guide"
description: "Density-independent factors limit population size no matter how crowded a population is. Learn how they pair with density-dependent factors in AP Bio Unit 8 logistic growth."
canonical: "https://fiveable.me/ap-bio/key-terms/density-independent-factors"
type: "key-term"
subject: "AP Biology"
---

# Density-Independent Factors — AP Bio Definition & Exam Guide

## Definition

These are environmental factors that affect a population's size regardless of its density. They include natural disasters, climate, and human activities.

## Related Study Guides

- [8.4 Effect of Density of Populations](/ap-bio/unit-8/effect-density-populations/study-guide/Zn70P0oeUAlNnbvUEjW3)

## Review

### Related Terms

- [Abiotic Factors](/ap-bio/key-terms/abiotic-factors): Non-living components of an ecosystem that can influence its functioning and survival such as sunlight, temperature, wind patterns etc.
- [Biotic Factors](/ap-bio/key-terms/biotic-factors): Living or once-living organisms in the ecosystem which can influence the population such as predators, competition for resources etc.
- Climatic Events: Weather-related events like hurricanes, droughts or floods that can drastically impact a population irrespective of its size.