BISC 102 Chapter Notes - Chapter 52.2: Exponential Growth, Logistic Function, Carrying Capacity

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Questions: populations involve growth or decline in number of individuals. A population"s growth rate is change in the number of individual in the population ( n) per unit time ( t) If no immigration or emigration is occurring, the a population"s growth rate is equal to the number of individuals (n) in the population times the difference between the birth rate per individual (b) and death rate per individual (d). The difference between the birth rate and death rate per individual is called the per capita rate of increase, and is symbolized r. (per capita means for each individual ) Per capita birth rate > per capita death rate r is (+) Per capita death rate exceed per capita birth rate r is (-) Intrinsic rate of increase (r max) - (conditions are optimal for particular species) birth rates per individual are as high as possible and death rates per individual are as low as possible rmax n.

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