ENVS200 Chapter Notes - Chapter Chapter 7: Intraspecific Competition, Isopoda, Cestoda
10 Feb 2018
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Document Summary
Predator: an organism that consumes other organisms, divisible into true predators, grazers, parasites, and parasitoids. Prey: an individual liable to be, or actually, consumed (and hence killed) by a predator. Invariably kill their prey and do so more or less immediately after attacking them: consume several or many prey items in the course of their life, e. g. lions, tigers, grizzly bears. Grazers: attack several or many prey items in the course of their life, consume only part of each prey item, do not usually kill their prey, especially in short term, e. g. cattle, sheep, locusts. Predators reduce the fecundity or chances of survival of individual prey and may therefore reduce prey abundance. Grazing has some effects on subsequent survival of plants on tendency to remain dormant and growth. All sorts of predators can cause reductions in the abundance of their prey.
