BIO120H1 Lecture Notes - Lecture 20: Interspecific Competition, Intraspecific Competition, Logistic Function
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BIO120H1 Full Course Notes
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Bio120: species interactions from two-species population models to. Types of interactions classified (+ or -) by who suffers and who benefits: consumer-resource (+/-): one species eats another, derives energy from it. Host-parasite: competition (-/-): typically thought of as on e species using up resources, exhausting supply so that other species suffers; both species attacking same pool of resources, each having negative effect on competitor, mutualism (+/+) E. g. pollination biology: pollinators help plant populations by letting them exchange gametes, plants help pollinators by providing rewards in form of pollen and nectar. Foci of study: population dynamics (ecological effects on n"s, can species coexist, evolutionary dynamics (adaptation, coevolution) Basic model: lotka-volterra equations for two species competing for resources. Logistic already has braking term for intraspecific competition within species. These paired differential equations are the lotka-volterra model for combined intraspecific and interspecific competition. Expect now to solve for n1 and n2 as f(t) Outcomes depend on values of k"s and "s.