Key Concepts

CONCEPT 9.1 Populations are groups of individuals of the same species that vary in size over space and time.

CONCEPT 9.2 Species vary in their distribution and abundance across their geographic range.

CONCEPT 9.3 Species are limited in their distribution and abundance by habitat suitability, historical factors, and dispersal.

CONCEPT 9.4 In metapopulations, sets of spatially isolated populations are linked by dispersal.

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