Recitation+5+_10.07.10_ - Communityecology Whatisacommunity?

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What is a community? What is community ecology? Ecological interactions o Mutualism (+/+) o Commensalism (+/0) o Amensalism (-/0) o Predation (+/-) o Parasitism (+/-) o Competition (-/-) Competition and environmental changes define the ‘niche’ of a species.  Competition can either be interspecific (among species) or intraspecific (within  species). Competition for the same resources can result in one of the two following: o extinction of one of the species (“complete competitors cannot coexist.”) o Character displacement: Two closely related species that live in the same  geographical area will most likely depend on the same resources. In this  case, competition between these species can result in changes in the  body structures and/or in the resources being used. Trophic structures: Feeding relationships between organisms
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Recitation+5+_10.07.10_ - Communityecology Whatisacommunity?

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