BIOL 180 Chapter Notes - Chapter 9: Integrated Pest Management, Coevolution, Commensalism
93
BIOL 180 Full Course Notes
Verified Note
93 documents
Document Summary
Community: all the populations of different species that interact in a certain area. Fitness: an individual"s ability to produce viable, fertile offspring. + interaction: relationship between two species provide a fitness benefit to members of one or both species. Interaction: relationship between two species incurs a fitness cost. 0 interaction: relationship between two species has no effect on the fitness of a participant. Commensalism (+/0): when one species benefits but the other species is unaffected. Competition (-/-): individuals use the same resources --> lowers fitness of both. Consumption (+/-): one organism eats or absorbs nutrients from another. Mutualism (+/+): two species interact in a way that increases fitness of both. Species interactions can affect the distribution and abundance of a particular species. Species act as agents of natural selection when they interact. Coevolution: a pattern of evolution where two species influence each other"s adaptations over time. The outcome of interactions among species is dynamic and conditional.
