Biology 2483A Lecture Notes - Lecture 12: Herbivore, Northern Canada, Population Ecology
25 Oct 2017
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Document Summary
Topic: predation and herbivory (part 2: predator populations can cycle with their prey populations. Results from mathematical predator-prey models, laboratory experiments, and field observations suggest that population cycles can be caused by exploitation. Whether predators and prey can coexist may depend on several factors, including habitat complexity and dispersal rates. Evolutionary change can affect predator-prey population dynamics, in some cases producing unusual population cycles. Mere presence of predator induces stress in hares produce less offspring. Population density of predator changes the density of the prey. Population cycles are difficult to achieve in the laboratory. Predatory mite that eats the herbivorous six-spotted mite. Complexity of habitat is important for sustaining populations. The prey mites persisted longer if the oranges they fed on were widely spaced: presumably it took the predators longer to find their prey. Strips of vaseline partially blocked movement of the predatory mites.
