Functional Response

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Functional response, a term used in biology and ecology with regards to predator-prey relationships, is the relationship between the density of prey in a certain area and the average number of prey specimens consumed by each predator in that area. The concept was introduced by the work of C.S. Holling, a Canadian ecologist that studied how predator per capita consumption of prey changed with prey density.

Funtional response is distinct from numerical response, which measures how the number of predators in an area vary with the density of prey.

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