Population_Ecology[1]

Population_Ecology[1] - Population Ecology Factors...

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Population Ecology Factors influencing the distribution and abundance of organisms
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What determines the abundance of an organism in a particular population? • Birth rate vs Death rate • Immigration vs emigration • These are related to abundance of resources, competitors, and climatic factors
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Organisms occur in varying densities and dispersion patterns
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Density vs Dispersion • Density is the number of individuals per unit area or volume • Dispersion is the spacing of individuals within a population • Different dispersion patterns are related to the distribution of resources and to behavioral interactions among individuals Most common Associated with territoriality Least common
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What determines the abundance of an organism in a particular population? Birth rate vs Death rate Immigration vs emigration Rate of Population Growth ( r ) = Births + Immigrants - Deaths + Emigrants
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Types of Survivorship Curves Constant mortality Low mortality of young High mortality of young
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Life History Strategies • Short-lived or unpredictable habitat • High mortality • Little investment in individual offspring
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Population_Ecology[1] - Population Ecology Factors...

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