AP Biology 8.7.B: Invasive Species

Explore AP Biology 8.7.B questions on why invasive species succeed in new communities and how they alter resources, competition, biodiversity, and ecosystem dynamics.

Exam points

explain why an introduced species may succeed when predators, competitors, diseases or resource limits are reduced or a niche is available
predict how invasive species can alter native populations, resource availability, competition, food webs and biodiversity
evaluate ecological consequences and tradeoffs of methods used to control or slow the spread of an invasive species

[Maximum number: 1]

The following models represent all the interacting species in two different communities with some of the same species and feeding relationships. These models assume that both communities have the same initial biomass. The models can be used to understand the effects of human activities on the communities.

Figure 1. Models of two different communities with some of the same species

Describe a characteristic of a community that makes a species invasive in that community but not invasive in a different community.

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8.7.B—Explain how invasive species affect ecosystem dynamics question 1