Population Ecology Part 2

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Presentation transcript:

Population Ecology Part 2 AP Biology Population Ecology Part 2

Expression of DNA to create traits

DNA Inherited

Century Plant

Exponential “Ideal” Growth

Elephant population 1900 1920 1940 1960 1980 Year Exponential Growth 8,000 6,000 Elephant population 4,000 2,000 1900 1920 1940 1960 1980 Year

Hawaii millions of years ago

Pioneer species begin to colonize (lichens and mosses)

Then over time, grasses begin to grow.

Then over time, shrubs will appear and they will be followed by trees.

Hawaii today

Intrinsic Growth

Logistic Growth

Logistic “realistic” growth

Allee affect and the Extinction Vortex Small population Genetic drift Inbreeding Lower reproduction Higher mortality Loss of genetic variability Reduction in individual fitness and population adaptability Smaller population