01:119:115 Lecture Notes - Lecture 24: Exponential Growth, Population Ecology, Carrying Capacity
14 Jan 2017
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Lecture 24 - population ecology: introduction to population ecology, basic concepts. Population = a group of potentially interbreeding organisms of same species. Ecology = study of interactions between living organisms and physical environment. Considers number of individuals of a species in an area & population dynamics. All populations have potential to change size over time. Fig 53. 3: changes in population size. Just births (b) and deaths (d) (no immigration or emigration) Pop growth rate can be expressed mathematically as. If you express b as avg births (bn) per capita. B = per capita birth rate . # offspring produced per yr by avr member of pop. D = avg deaths (mn) per capita. M = per capita death rate (= mortality) expected # deaths per year. We are really interested in looking at how change occurs over a long time, the rate of. Change in population overtime = births minus deaths change.
