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Common Ecological Misconceptions

PREDATORY-PREY INTERACTION

Misconception

Reference*


The relative sizes of prey and predator populations have no bearing on the size of the other.

Gallegos et al. 1994

In a food web, a change in size in one population will only affect another population if the two populations are directly related as predator and prey.

Gallegos et al. 1994

Organisms higher in a food web eat everything that is lower in the food web.

Griffiths & Grant 1985

Populations higher on a food web increase in number, because they deplete those lower in the web.

Munson 1991, 1994

The number of producers is high to satisfy consumers. Leach et al. 1996
"Balance of nature" refers to populations of predators and prey being similar in size. Brehm et al. 1986
Food chains involve predator and prey, but not producers. Gallegos et al. 1994
Carnivores are big and/or ferocious. Herbivores are passive and/or smaller. Gallegos et al. 1994
Carnivores have more energy or power than herbivores do. Adeniyi 1985
Plants are weak and cannot defend themselves. D'Avanzo 2003

*Complete references are available on the Resources Page.

 


 

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