lecture_notes_9_19_07 - Lecture Notes POPULATION a group of...

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Lecture Notes 9-19-07 POPULATION: a group of organisms of the same species living together in the same place at the same time. Populations can consist of genetically separate individuals or, in the case of MODULAR ORGANISMS (Example: Aspen Clone), of MODULES---units of body construction that are very similar to the units of which an organisms is already composed. Population ecology looks at relationships of individuals within a population to one another and to their environment. __Populations can be studied at a variety of scales, ranging from a local group to an entire species Populations may be continuous, or occur as isolated subpopulations, which together comprise a metapopulation POPULATION ECOLOGY TOPICS Size Dispersion (Spatial Arrangement –Change Through Space) Age or Life Stage Structure Dynamics (Change Through Time) Conservation POPULATION SIZE: the number of individuals (modules) in a population often expressed as DENSITY – the number of organisms per unit area or volume Population size is dynamic.
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