Textbook: Chapter 18 - Factors Influencing the Structure of Communities Flashcards

1
Q

Apparent Competition

A

Occurs whena single species of predator feeds ont wo prey species supporting a higher predator density, increasing the rate at which prey are consumed. As a result, the density of both prey species is lowered, suggesting a competitive interaction

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2
Q

Bottom-up control

A

Influence of producers on the trophic levels above them in a food web

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3
Q

Keystone predation

A

Predation that is central to the organization of a community; the predator enhances one or more inferior competitors by reducing the abundance of the superior competitor.

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4
Q

Null model

A

Assumes that the presence and abundance of the individual species found in a given community are solely a result of the independent repsonses of each individual species to the prevailing physical environment

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5
Q

Top-down control

A

Influence of predators on the structure of lower trophic levels in a food web.

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