Biodiversity (APES M14,15,17)

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Ecological Succession

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The predictable replacement of one group of species by another group of species over time.

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Primary Succession

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Ecological succession occurring on surfaces that are initially lacking soil.

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Bottleneck Effect

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A reduction in the genetic diversity of a population caused by a reduction in its size.

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Pioneer Species

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A species that can colonize new areas rapidly and grow well in full sunshine.

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Realized Niche

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The portion of a niche fulfilled due to competition or other species interactions.

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Climax Community

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A stable community that no longer goes through major ecological changes.

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Genetic Drift

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A mechanism of evolution that refers to random changes in the frequency of alleles in a population.

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Gene Flow

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The transfer of genetic variation from one population to another.

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Fundamental Niche

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The full range of environmental conditions under which a species can survive and reproduce.

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Island Biogeography

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The study of the ecological relationships and distribution of organisms on islands.