Community Ecology - BSC 2011 (Dr. Song) - 1 Community...

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Community Ecology (Chapter 54) Community: a group of populations of different species living close enough to interact Interspecific (between-species) interactions Competition Predation Herbivory Symbiosis (parasitism, mutualism, commensalism) Interspecific Competition When individuals of different species compete for a resource that limits their growth and survival Principle of competitive exclusion o Even a slight reproductive advantage will eventually lead to local elimination of the inferior competitor Ecological niches Sum of a species’ use of biotic and abiotic resources in its environment o Realized niche - The resources a species DOES use o Fundamental niche - The resources a species CAN use Niche overlap leads to competitive exclusion Resource partitioning Differentiation of niches that enables similar species to coexist in a community “The ghost of competition past” Character displacement Tendency for characteristics to diverge more in sympatric (geographically overlapping) populations of two species than in allopatric (geographically separate) populations of the
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This note was uploaded on 09/21/2011 for the course BSC2011C 2011 taught by Professor Fedorka/song during the Spring '11 term at University of Central Florida.

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Community Ecology - BSC 2011 (Dr. Song) - 1 Community...

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