ENV - Environmental Science ENV 101 Chapter Notes - Chapter 4: Logistic Function, Survivorship Curve, Exponential Growth
21 Sep 2016
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Population change: (births + immigration) (deaths + emigration) Equilibrium: birth and immigration is more or less equal to deaths and emigration. Population growth rate: amount population has changed time it had to change. Constant population growth: staring population + (a constant x time) = end population. Population explosion: caused by exponential growth increase staring population x a constant (e) multiplied by itself a certain number of times = end population. Carrying capacity: limit to a population that an ecosystem can support. Logistic growth: starting population + (r) reproductive capacity x population (a number that represents how far the population is from carrying capacity) = ending population. * maximum rate will occur at halfway to carrying capacity. Biotic potential: the number of offspring that members of a species can produce under ideal conditions. Recruitment: survival through the early growth stages to become part of the breeding population.
