Population Ecology

AP Biology· difficulty 3/5

Per-capita rates are plotted vs. population density.

death rate birth rate Population density Per-capita rate

The graph illustrates which type of regulation?

  • A

    Density-dependent regulation via increasing death rate

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  • B

    Exponential growth

  • C

    Density-independent regulation

  • D

    Allee effect

Explanation

Density-dependent regulation occurs when birth rates fall and/or death rates rise as density increases, providing negative feedback on population size.

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