01:119:115 Chapter Notes - Chapter 53: Exponential Growth, Population Ecology, Semelparity And Iteroparity

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Populaion: group of potenially interbreeding organisms of same species. Ecology: study of interacions between living organisms and physical environment. Populaion ecology: considers number of individuals of a species in an area and popular dynamic. How and why populaion size increases or decreases over ime. All populaions have potenial to change in size over ime change in populaion size = births + immigrants entering the pop - deaths - emigrants leaving populaion. Considering just births (b) and deaths (d) and no immigraion or emigraion. Populaion growth rate can be expressed mathemaically as: change in populaion size (triangle n) / ime interval (triangle t) = b - d: per capita (per individual) growth rate. Now express b as average birth (bn) per capita (per individual) per year -> = per capita birth rate -> # of ofspring produced per year by average member of populaion.

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