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Unformatted text preview: place at same time; i.e. an interbreeding group/ primary unit of Ecological study A. Range: geographical distribution 1. Undergoes expansion and contraction 2. Adapted to range as a result of natural selection 3. Metapopulation: a network of interconnected populations; occur in areas in which suitable habitat is patchily distributed and is separated by intervening stretches of unsuitable habitat a. Source-Sink metapopulations: some areas are suitable for long-term habitat others are not b. Implications for the range of a species: -Occupy larger area -Prevent long-term extinction B. Growth Patterns / dynamics: the quantitative study of populations/ change in size through time 1. Exponential growth – simplest model (J-Shaped curve) a. Characteristics of small population with unlimited resources; lab cultures, colonizing species b. Per capita rate of increase, r, is a constant c. Growth rate, gG g± = ± rN , increases due to increase in # of individuals, N...
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