ENVS2003 Lecture Notes - Lecture 17: Exponential Growth, Doubling Time, Fecundity
29 Jun 2016
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Document Summary
Population ecology - exponential growth and doubling time: - exponential growth: growth at a constant rate of increase per unit of time. The sequence follows a geometric rate of increase - Doubling time: amount of time necessary for the population to double. 70 / annual % growth - population oscillations: - May be irregular if they depend on complex environmental and biotic relationships. Carrying capacity: - carrying capacity: the maximum number of individuals of any species that can be supported by a particular ecosystem on a long-term basis. Catastrophic population decline: - catastrophic system: when the population jumps from one seemingly steady state to another without any intermediate stages. Fecundity and fertility: - natality: production of new individuals, main source of adding to populations, sensitive to environmental conditions, - fecundity: physical ability to reproduce - fertility: measure of the actual number of offspring produced.
