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APES semester exam

Terms in this set (191)

biotic factors
living parts of an ecosystem
abiotic factors
nonliving parts of an ecosystem
Community
A group of interdependent organisms inhabiting the same region and interacting with each other
Ecosystem
A biological community of interacting organisms and their physical environment.
ecosystem services
Important environmental benefits, such as clean air to breathe, clean water to drink, and fertile soil in which to grow crops, that ecosystems provide
Mutualism
A relationship between two species in which both species benefit
Commensalism
A relationship between two organisms in which one organism benefits and the other is unaffected
Parasitism
One organism benefits and the other is harmed
Predation
An interaction in which one organism kills another for food.
competition
A common demand by two or more organisms upon a limited supply of a resource; for example, food, water, light, space, mates, nesting sites. It may be intraspecific or interspecific.
interspecific competition
competition between members of different species
intraspecific competition
competition between members of the same species
Symbiosis
A close relationship between two species that benefits at least one of the species.
aggregation
To come together into a mass, sum, or whole
prey size selection
when given abundant prey, a predator will select the one that will maximise its energy
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