BIO 200 Lecture Notes - Lecture 27: Paramecium, Commensalism, Parasitism
22 Nov 2016
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Species interactions: biotic interactions can cause strong selective pressures, there are lots of ways to interact, competition, predation, symbioses. Key terms/concepts: types of species interactions, competition. When 2 or more species need the same resource (-/-) Use by one species reduces availability for other species: predation. Leads to strategies for survival: symbioses. Permanent association where both parties benefit: commensalism. For non human organisms, there are no events. If organisms are coexisting, major competition probably occurred in the past. Competition worked out: the ghost of competition past. Refer to macarthur"s warblers: how do you study competition, experiments, comparisons of sympatric and allopatric populations. Allopatric - live apart: exploitation competition. One species lowers the resources of another: inference competition. One species prevents the other from gaining access to a resource: interspecific vs. intraspecific. Intraspecific specific - members within same species compete. Interspecific species - competition between other species: resources. Resource - anything an individual needs to support population survival and growth.
