Chapter 53 Community Ecology

Chapter 53 Community Ecology - Chapter 53 Community...

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Chapter 53 Community Ecology Lecture Outline Overview: What Is a Community? community  is defined as an assemblage of species living close enough together  for potential interaction. Communities differ in their species richness, the number of species they contain, and  the relative abundance of different species. Concept 53.1 A community’s interactions include competition, predation, herbivory, symbiosis, and disease There are a number of possible  interspecific interactions  that link the species of  a community. Interspecific interactions can be symbolized by the positive (+) or negative (−) effects  of the interaction on the individual populations. 0 indicates that a population is not affected by the interaction. The effect of an interaction between two species may change as circumstances  change. Interspecific competition  can occur when species compete for a specific limiting  resource. When two species compete for a resource, the result is detrimental to one or both  species (−/−) Strong competition can lead to the local elimination of one of the two competing 
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This note was uploaded on 01/04/2012 for the course BSC BSC1005 taught by Professor Orlando,rebecca during the Fall '10 term at Broward College.

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Chapter 53 Community Ecology - Chapter 53 Community...

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