GenBio6Comm - Community Ecology Community Interactions...

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Community Ecology 1 Community Interactions Keystone species Succession COMPETITION - - PREDATION + - SYMBIOSIS Mutualism Commensalism Parasitism + + + + o - Community Interactions Types of relationships between populations A B
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Community Ecology 2 Competition Fitness cost to both - / - Intra specific Inter specific Fundamental Niche theoretical Realized Niche actual - / - Possible Outcomes of Niche Competition Competitive Exclusion (extinction) Character Displacement Resource/Niche Partitioning
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Community Ecology 3 Gause’s Principle of Competitive Exclusion No two species can completely ecologically overlap each other - / - - / - No competition Fill Fundamental Niche - / - Competition: Fill Realized Niche HOW THEN DO SPECIES WITH SIMILAR NICHES CO-EXIST?!?
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Community Ecology 4 Character Displacement a l l o p a t r i c sympatric Increased differences between species where they are sympatric Spatial Partitioning - / - Resource/Niche Partitioning subdividing the habitat temporally or spatially Temporal Partitioning - / - Evolution favors specializations that reduce competition
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