BIOL 203 Lecture Notes - Lecture 19: Prey Switching, Long Term Ecological Research Network, Functional Response
Document Summary
C = coef cient for capture ef ciency of predators: b = coef cient for feeding ef ciency with which prey are covered into predator offspring. D = probability of death of predators: prey. Dn/dt = rn - cnp: predator. Dp/dt = bcnp - dp: prey isocline. Modi cations of the model: prey isocline incorporates density-dependence. Functional response: is the relationship between the per capita rate of consumption of prey and number of prey, type i functional response. Predators have ability to regulate the prey population to prevent it from increasing. Ex. passive lter feeders like spider webs: type ii functional response. Unable to regulate prey population: type iii functional response. Prey has refuge at low density, and at high density it is too overwhelming for the predators to keep up. Prey switching could occur, where at low pops of prey, the predators switch to different kind of prey.
