GenBio_5_PopEcol

GenBio_5_PopEcol - Population Ecology 1 • Dispersion •...

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Unformatted text preview: Population Ecology 1 • Dispersion • Changes in Population Size: Population Models • Population Regulating Mechanisms • Reproductive Strategies Î r & K selection • Survivorship Curves ECOLOGY - Recommended Reading Population Ecology Chap. 51 Community Ecology Chap. 52 a) Clumped (patchy) b) Uniform c) Random Dispersion e.g. behavioral patterns e.g. behavioral patterns often lead to clumping often lead to clumping Population Ecology 2 All organisms produce more offspring than can possibly survive to reproduce CHANGES IN POPULATION SIZE One pair IF all offspring survived, in 7 generations the population would number: 5,598,720,000,000 Populations possess enormous potential for growth 100 pair IF all offspring survived, in 15 generations the population would number: 10 79 Population Ecology 3 Two opposing forces in population growth: • Natality (b) • Mortality (d) Growth rate or the intrinsic rate of increase (r) : r = b – d Δ N/ Δ t = b – d dN/dt = rN POPULATION MODELS dN/dt = rN Modeling EXPONENTIAL Growth N = # of individuals in population r = intrinsic rate of growth t = time d = Δ or change Malthus ‘J’ curve Population Models Malthus...
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This note was uploaded on 08/10/2009 for the course BIO 102 taught by Professor Brey during the Spring '08 term at Rutgers.

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GenBio_5_PopEcol - Population Ecology 1 • Dispersion •...

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