Ch54-1 - Chapter 54 Community Ecology Lecture Out Line What...

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Chapter 54 Community Ecology
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Lecture Out Line What is a community? Community interaction : a. competition b. predation c. herbivory d. symbiosis & disease
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Is there an connection between these organisms Bees Plants and trees Flowers and Seeds Birds Squirrels Mountain lions and coyote Caterpillars are linked to plants because they feed on leaves, Flowers are linked to pollinators, such as bees, Fruits provide food for mammals and birds and in turn are dispersed by them.
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What is a community? A biological is an assembly of populations of various species living close enough for potential interaction. Because the species in a community interact almost constantly, the fate of a particular population may be tightly linked to the other species that share its habitat. Coevolution - back and forth adjustments made between two interacting species (Eg: predator and prey) community
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Community interactions are classified by whether they help, harm, or have no effect on the species involved Relationships between species in a community Competition Predation Herbivory Symbiosis Disease positive (+), negative (–), or no effect (0) interspecific interactions.
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Table 53.1
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Competition
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Competition is a –/– interaction that occurs when individuals use the same limiting resources. occurs between members of the same species. • Because intraspecific competition for resources
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This note was uploaded on 10/21/2009 for the course BIOL 6C taught by Professor Sundram during the Spring '09 term at DeAnza College.

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Ch54-1 - Chapter 54 Community Ecology Lecture Out Line What...

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