Biology 1001A Lecture Notes - Ecological Succession, Secondary Succession, Primary Succession
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Species, richness, evenness, diversity: species diversity or species richness: the total number of different species in a community, species evenness: the relative abundance of each of those different species in the community. Islands farther away from the mainland have fewer species: immigration rates are lower because it is more difficult to reach the islands. Applications of island biogeography: habitat islands: area of habitats surrounded by a sea of unsuitable habitat (example: a nature park surrounded by a large city, the patterns above apply to these environments as well. Ecological succession: a change in the species make up of a community. Primary succession: when a new community comes in and colonizes in an area where there was no previous plant growth. As plant communities change: animal communities change as well. Ecological disturbance: physical damage to a community, which removes biomass (typically the plant community is disturbed) Disturbance and secondary succession: some forests need ecological disturbance (disclimax communities need secondary successions)