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POPULATION ECOL ; CP

QuestionAnswer
Population A group of organisms of the same species living in the same place at the same time.
Population Density The number of individuals living in a given area or space.
Why population density matters It helps scientists understand how crowded a population is and how it may change over time.
Natality The number of individuals born into a population.
Mortality The number of individuals that die in a population.
Immigration When individuals move into a population.
Emigration When individuals move out of a population.
Population Growth An increase in the number of individuals in a population.
Exponential Growth Population growth that increases rapidly with no limits.
Logistic Growth Population growth that increases and then levels off.
Carrying Capacity The largest population an environment can support.
Limiting Factors Things in the environment that limit population size.
Biotic Factors Living factors that affect populations.
Abiotic Factors Nonliving factors that affect populations.
Density-Dependent Factors Factors that have a greater effect when population density is high.
Examples of Density-Dependent Factors Competition, disease, predation.
Density-Independent Factors Factors that affect populations regardless of size.
Examples of Density-Independent Factors Weather, pollution, natural disasters.
Population Dispersion How individuals are spaced within a population.
Clumped Dispersion Individuals live in groups.
Uniform Dispersion Individuals are evenly spaced.
Random Dispersion Individuals are spread unpredictably.
Created by: pnetha
 

 



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