BIO 126 Lecture Notes - Lecture 20: Pupfish, Population Ecology, Overfishing
26 May 2016
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Document Summary
Population group of interbreeding individuals occupying the same habitat at the same time. Population ecology study of what factors affect population size and how these factors change over space and time. If two groups are not interbreeding, they are not in the same population. Most species have limited geographic range: devil"s hole pupfish lives in a single spring in southern nevada. Polar bears are well adapted for the arctic but you won"t find them in the tropics. Its range is limited by physical factors- shoreline, etc. Predators and competition factor into community ecology not population ecology. The study of how births and deaths change populations over time. Some factors like birth and death affect small populations more than larger ones. A population is a group of individuals of the same species that inhabit a given area. A genetic unit with a specific gene pool. Demography: dynamics: changes through time resulting from birth, death and movement of individuals.
