Overpopulation

Overpopulation, also called overabundance, occurs when a species' population is larger than its environment's carrying capacity. It can result from increased births, lower mortality, reduced predation, or large-scale migration. Overpopulated animals may compete for food, space and resources, then migrate or die without necessary resources. Assessments of overpopulation involve facts and values, including perceived harmful effects on people, ecosystems and other species.

Definition

A population larger than its environment's carrying capacity

Possible causes

Birth rates, mortality, predation and migration changes

Assessment

Involves both facts and values