EBIO 1210 Lecture Notes - Lecture 41: Pioneer Species, Ecological Succession, Primary Succession
25 Apr 2016
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41: community ecology: concepts of community structure, intraspecific competition, interspecific competition. Interspecific interactions: interspecific competition interference competition: actual fighting over resources. 1: exploitative competition, competitive exclusion principle (fig. 3: ecological niches: a niche is the description about how an organism utilizes its habitat. Fundamental niche: everywhere an organism should be found. Realized niche: part habitat in which the organism is actually found: resource partitioning (fig. 2): similar species actually have slightly different niches: character displacement (fig. 4): in sympatric species competition causes selection and divergence of one or more characters. Can result in resource partitioning: predation, herbivory and plant defenses secondary compounds: some secondary metabolites, like morphine, caffeine, nicotine, strychnine etc. , are toxic to many plant predators, animal defenses against predators (fig. 5: cryptic coloration: camouflage, aposematic coloration, deceptive coloration, batesian mimicry, mullerian mimicry, parasitism: ectoparasites and endoparasites, parasitoidism, mutualism, commensalism and facilitation.
