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Carrying Capacity

AQA A-level BiologyPopulations in EcosystemsLesson 4 of 20

The carrying capacity is the maximum population size of a species that an ecosystem can support. It is set by the supply of resources, such as food, water, space and light, and by other limiting factors in the environment.

When a species colonises a new area, its population usually grows in a pattern called a sigmoid (S-shaped) growth curve.

Diagram

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