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Population Dynamics

Population Dynamics Vocab

TermDefinition
Carrying Capasity The largest population that an environment can support at any given time.
Climax community a stable, mature community that undergoes little or no change in species over time
Density-dependent factor A variable affected by the number of organisms present in a given area
Density-independent factor a variable that affects a population regardless of the population density, such as climate
Emigration The movement of individuals out of a population.
Exponential Growth Model The pattern for population increase under ideal conditions. J-shaped growth curve is characteristic. The model assumes resources are unlimited. equation: dN/dt= RmaxN
Immigration Movement of individuals into an area occupied by an existing population
Limiting Factors any biotic or abiotic factor that restricts the existence, numbers, reproduction, or distribution of organisms
Logistic Growth Model a description of idealized population growth that is slowed by limiting factors as the population size increases nad carrying capacity. (S shaped Curve)
Mortality The ratio of deaths in an area to the population of that area
Natality The ratio of live births in an area to the population of that area
Population Density the number of individuals of the same species that live in a given unit of area.
Primary Succession succession that begins in an area that previously did not support life
Secondary Succession the process by which one community replaces another community that has been partially or totally destroyed
Created by: Christensent