PopulationGrowth

# PopulationGrowth - 1 Population Growth Goals • Defne...

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Unformatted text preview: 1 Population Growth Goals • Defne “population” • Explain Factors contributing to population growth • Explain exponential and logistic population growth models • Explain carrying capacity and what Factors may defne the carrying capacity For a population Why care about population growth and limits to population size? too few? Why care about population growth and limits to population size? Too many? Population size-200 200 400 600 800 1000 1200 1 2 3 4 5 6 7 8 9 10 11 time r = 0 r = -0.3 r = 0.3 r = 0.2 r = 0.1 Small changes in r make a big difference-100 100 200 300 400 500 600 700 800 Population Size 1 2 3 4 5 6 7 8 9 10 11 time N = 5 r = 0.5 N =50, r = 0.1 The inFuence of N vs. r on population growth dN/dt = rN 2 1. Elephants live about 90 years 2. Elephants become sexually mature and can reproduce at about age 30 3. Thus, an elephant has a reproductive lifetime of about 60 years 4. A pair of elephants produce about 6 offspring in their lifetimes....
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## This note was uploaded on 07/29/2010 for the course BIS 2B taught by Professor Strong during the Summer '08 term at UC Davis.

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PopulationGrowth - 1 Population Growth Goals • Defne...

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