BIOLOGY 3SS3 Lecture Notes - Lecture 5: Carrying Capacity, Genetic Drift, Ecological Niche
12 Apr 2017
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Document Summary
Interspecies interactions: competition: interaction hurts both species, exploitation: interaction is good for one but bad for the other, mutualism: interaction is good for both, commensalism: interaction is good for one species neutral for the other. Competition: when two species depend on the same resource(s: each species ability to reproduce successfully is reduced (survival, growth, reproduction, species may be very similar or very different. Outcomes of competition stable environments: dominance: one species win every time, co-existence: if both species are present, they will both persist, founder control: one with head-start wins. Carrying capacity b(k) = d(k: when =k1 right amount of competitive pressure to make r = 1. Balanced competition - both species have the same relative effect on each other. Equal competition = 1: competitive effect of an individual from either species is the same. Whichever species has a higher value of k can survive at a density where the other one can"t.
