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Ch. 20.2 Study Cards

Define

TermDefinition
Species Richness The number of species in a community.
Species Evenness The relative abundance of each species.
Species-Area Effect A pattern of species richness that states that 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.
Ecological Succession The gradual, sequential 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.
Secondary Succession The sequential replacement of species that follows disruption of an existing community.
Pioneer Species The species of organisms that predominate early in succession.
Climax Community When communities proceed through a predictable series of stages until it reaches a stable end point.
Created by: neubeckerm17
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