BIO 200 Lecture Notes - Lecture 28: Coevolution, Herbivore, Detritivore
5 Dec 2016
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Document Summary
Consumer/resource interactions: predation is universal, there are many types of predation/consumption, consumer species have major effects on prey species, many predator/prey populations cycle, coexistence between predators and prey. Coevolution among predators and prey: prey evolve to avoid predators, what if you"re sessile, predators evolve more efficient ways to hunt prey. Everybody eats: but, not all consumption is by true predators. They are not typically the direct cause of death. Herbivores eat plants and can be predatory or parasitic. When the whole plant is consumed true herbivore. Detritivores are consumers that don"t control their prey abundance. Prey elimination isn"t limited to the lab. Predator eats enough prey to reduce the numbers. The prey will change so they predators can"t get them. There are many mechanisms of predatory-prey coexistence: refuges, cycling, few predators, generalist predators. Hiding in plain site: disguising yourself. Object mimicry: will try to look like an object: chemical defense, toxicity.
