biology ch. 20 terms
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| predation | an interaction between two species in which one species, the predator, feeds on the other species, the prey
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| interspecific competition | a relationship between two species in which both species complete for limited resources such that both species are negatively affected by the relationship
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| sybiosis | a relationship in which two different organisms live in close association with each other
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| parasitism | a relationship between two species in which one species, the parasite, benefits from the other species, the host, which is harmed
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| mutualism | a relationship between two species in which both species benefit
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| commensalism | a relationship between two organisms in which one organism benefits and the other is unaffected
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| species richness | the number of different species in an area or community
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| species evenness | a measure of the relative adundance of each species in an ecological community
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| species-area effect | a pattern in which the number of species in an area increases as the area increases
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| disturbance | in ecology; an event that changes a community by removing or destroying organisms or altering resource availability
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| stability | the tendency of a community to maintain a relatively constant structure
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| ecological succession | a gradual process of change and replacement in a community
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| primary succession | succession that begins in an area that previously did not support life
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| secondary succession | the process by which one community replaces another community that has been partially or totally destroyed
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| pioneer species | a species that colonizes an uninhabited area and that starts an ecological cycle in which many other species become established
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| climax community | a final, stable community in equilibrium with the environment
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