Disruptions to Ecosystems

AP Biology· difficulty 3/5

Years since introduction Population size lag explosive saturation

The lag-explosive-saturation pattern shown is characteristic of:

  • A

    Native species at equilibrium

  • B

    Many invasive species after introduction

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  • C

    Endangered species in steep decline

  • D

    Species undergoing genetic drift

Explanation

Successful invaders often show an initial lag (low density, adaptation), then explosive growth as populations expand, then saturation at carrying capacity.

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