Chap 13 Populations Part II

Chap 13 Populations - for future growth to 2050 • How could the carrying capacity change Signs That the Population Is Not Near Carrying Capacity

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Carrying Capacity and Logistical Growth Carrying capacity – the maximum population that can be supported by a given environment May start out with exponential growth, but then growth rate tends to slow down S-shaped curve
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Think of limiting factors…
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What scale for bacteria? whales? dandelions?
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Carrying Capacity and Logistical Growth The growth rate approaches zero as the population size reaches the carrying capacity birth rate = death rate Population size is relatively stable
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What are density dependent factors? What are density- independent factors?
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Earth’s Carrying Capacity for Humans The growth rate has slowed From high of 2.1% in 1960 to 1.2% now The UN has offered three projected tracks
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Unformatted text preview: for future growth to 2050 • How could the carrying capacity change? Signs That the Population Is Not Near Carrying Capacity The slowing of the growth rate is not due to density dependent factors, but rather due to birth rates falling faster than death rates Introduction to Biomimicry http://www.youtube.com/watch?v=k • Nature runs on sunlight. • Nature uses only the energy it needs. • Nature fits form to function. • Nature recycles everything. • Nature rewards cooperation. • Nature banks on diversity. • Nature demands local expertise. • Nature curbs excesses from within. • Nature taps the power of limits....
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This note was uploaded on 01/05/2010 for the course BIO 101 taught by Professor Anderson during the Fall '09 term at Point Loma.

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Chap 13 Populations - for future growth to 2050 • How could the carrying capacity change Signs That the Population Is Not Near Carrying Capacity

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