9/16/2013 1 Community Ecology Ecological interactions affect how organisms evolve, and evolutionary change in turn affects ecological relationships. Community Ecology Community Ecology • looking at the interactions between populations + interspecific/intraspecific interactions - interactions between populations of different/same species - positive (+), negative (-), or neutral (0) + types - Competition - Predation - Symbiosis
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9/16/2013
1
Community Ecology
Ecological interactions affect how
organisms evolve, and evolutionary
change in turn affects ecological
relationships.
Community EcologyCommunity Ecology• looking at the interactions between populations
+ interspecific/intraspecific interactions
- interactions between populations of different/same species
- positive (+), negative (-), or neutral (0)
+ types
- Competition
- Predation
- Symbiosis
9/16/2013
2
CompetitionCompetition (-/-)• interaction between individual organisms that use the same resources
present in limited supply
- niche: set of resources/conditions necessary for survival
+ organism’s role/job in the community
- intraspecific/interspecific competition
+ same/different species
- types
+ Interference Competition
- animals: overt fighting; plants: secretion of toxins