Lect 14 Population dynamics II PP outline

Lect 14 Population dynamics II PP outline - Population...

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Population Oscillations Overshoot - Measure of extent to which population exceeds carrying capacity of its environment. Dieback - Negative growth curve. Severity of dieback generally related to the extent of overshoot. Population Change So, just what is at work in the population to cause it to increase or decrease in size? What causes d to increase or decrease? What causes b to increase or decrease? REGULATING POPULATION GROWTH Intrinsic factors - Operate within or between individual organisms in the same species. Extrinsic factors - Imposed from outside the population. Biotic factors - Caused by living organisms. Abiotic factors - Caused by non-living environmental components. Density-dependent Factors If a change in population density alters how factors effect a population…. As density increases, density-dependent factors tend to slow growth. Density-dependent Factors…
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Lect 14 Population dynamics II PP outline - Population...

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