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EP Ch 8

Coevolution 2 species develop adaptations to increase the benefit of the relationship
Population all of one species in an area
Density number of individuals per unit area
Dispersion random(spread out), clumped, even
Symbiosis close relationship between two organisms
Parasitism one organism benefits, the other is harmed, usually not killed
Commensulism one organism benefits the other is unaffected
Mutualism both organisms benefit
Predator / prey example, predator kills prey
Niche roles and organism plays, includes home, interactions, and environmental factors
Density independent deaths deaths not effected by how close together organisms are, ex: weather related deaths
Density dependent deaths deaths effected by closeness of organisms, ex: disease
Reproductive potential maximum number of offspring a species produces, high potential=numbers increase rapidly, effected most by earlier reproductive age
Exponential growth population increases rapidly, ex:
Carrying capacity determined by most limited resources, maximum population an ecosystem can support
Habitat where an organism lives
Competition both organisms are harmed, does not occur between different ecosystems
Generation time average age at which a species reproduces
Limiting resource resource in lowest supply
Niche restriction using only part of available resources
Population growth birth rate minus death rate
Created by: evroman