BISC 204 Lecture Notes - Lecture 5: Generation Time, Habitat Destruction, Exponential Growth

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Group of regularly interbreeding individuals of a species. Populations can be characterized via life tables they vary in space from distribution and dispersion they vary in time from abundance and dynamics. Distribution: spatial extent of organisms within a species. Physical: the requirements for the habitat and limits of the environment. Biological: other species predators, prey, parasites etc. Within a distribution, there is a dispersion of the population, which describes the spacing between individuals within the population in an area: Abundance: number of individuals in a population. Dynamic, changes through time (balance of births, deaths, emigration, immigration) Often expressed as density = # individuals/area. On average every individual produces one successful offspring-- replacement rate results in steady state population. Demography: study of these processes: the balance of births deaths and immigration emigration. The stability of populations must mean that on average each individual is only replacing itself through reproduction.

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