Population growth rate is the change in the number of individuals in a population over a specific period of time. It is typically expressed as a percentage or as the number of individuals added per unit time.
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Population growth rate can be influenced by birth rates, death rates, immigration, and emigration.
Exponential growth occurs when resources are unlimited, leading to a rapid increase in population size.
Logistic growth describes how a population grows more slowly as it approaches its carrying capacity due to limited resources.
Density-dependent factors, such as disease and competition for resources, can slow population growth as the density increases.
Density-independent factors like natural disasters can affect population size regardless of its current density.
A pattern of data that shows greater increases with passing time, creating a curve that represents rapid population increase under ideal conditions.
Density-Dependent Factors: Factors whose effects on the size or growth of the population vary with the population density, such as competition and predation.