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species richness

the number of different species in a community

species evenness

Abundance of individuals within each species contained in a community.

species-area effect

a pattern of species distribution in which larger areas contain more species than smaller areas do

ecological succession

A gradual process of change and replacement in a community.

primary succession

succession that begins in an area that previously did not support life

secondary succession

the process by which one community replaces another community that has been partially or totally destroyed

pioneer species

a species that colonizes the uninhabited area and that starts an ecological cycle in which many other species become established

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