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20.2 Vocabulary

Terms for chapter twenty section two: Modern Biology

QuestionAnswer
species richness the number of species in the community.
species evenness the relative abundance of each species.
specie-area effect a pattern of species richness where larger areas usually contain more species than smaller areas do.
disturbances events that change communities, remove or destroy organisms from communities, or alter resource availability.
stability the tendency of a community to maintain relatively constant conditions stability therefore relates to the community's resistance to disturbances.
ecological succession the gradual, sequental regrowth of a community of species in an area.
primary succession the development of a community in an area that has not supported life previously. (ie: bare rock, sand dune, etc.)
secondary succession the sequential replacement of species that follows disruption of an existing country.
pioneer species the species of organisms that predominate early in succession.
climax community the stable end point of succession.
Created by: DouglasI16
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