Chap+54+Community+Ecology

Chap+54+Community+Ecology - Community Ecology All the...

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Community Ecology Individual Concept = aggregate of species Holistic Concept = integrated unit All the organisms that live together at a time and in a place
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Interactions among species shape the niche Niche = the total ways in which an organism uses the resources of its environment Fundamental niche Realized niche delimited by interspecific competition
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Gause’s principle of competitive exclusion = no two species can occupy the same niche indefinitely when resources are limiting population density Competition Different Realized Niches
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Coping with competitive exclusion: Resource Partitioning = division of the niche Sympatric Species: co-occurring sympatric species exhibit greater morphological differences; character displacement ; promotes divergence
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Predation has Ecological and Evolutionary Effects: Predator-prey Populations Predation is the consuming on one organism by another Predator-Prey interactions establishes a co-evolutionary “arms race”
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Predator-Prey Interactions PLANT DEFENSES AGAINST
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This note was uploaded on 09/16/2008 for the course BIOL 1720 taught by Professor Jagadeeswaran during the Spring '08 term at North Texas.

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Chap+54+Community+Ecology - Community Ecology All the...

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