BIO120H1 Lecture Notes - Lecture 7: Theoretical Ecology, Metapopulation, Evolutionary Medicine

• School: UTSG
• Department: Biology
• Course: BIO120H1
• Professor: Ingrid L.Stefanovic

Document Summary

Competition (-/-) as one individual gets more, another gets less) Basic model: lotka-volterra equations for two species competing for resources. Logistic already has braking term for intra-specific variation. Both species must inhibit own growth more than it inhibits growth of competitor; otherwise, competitor drops in population and allows other species to grow. Alpha"s must be smallish (share less resources) (see lecture slides for equations): know the equations and the meanings of the terms. Expect now to solve for n1 and n2 as f(t), but . Identity of winner may depend on starting n"s. Outcomes depend on values of k"s and a"s (small alpha"s mean less sharing of resources = makes it easier for species to coexist) Coexistence requires both species to inhibit their own growth more than they inhibit each other"s. Can expand to consider n species (be able to write l-v equations and explain what the terms are) Will consider this later, under niche theory www. notesolution. com.