population - BIOL 110: Population Growth Population growth...

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BIOL 110: Population Growth
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Population growth Ø Population: a group of individuals of the same species in the same place Ø Natural populations typically display two types of growth: Ø Exponential Ø Logistic Ø Exponential growth : all or a fixed proportion of individuals can reproduce Ø No ecosystem limits to growth
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Populations’ capacity for growth Ø How fast the populations of a certain type of species can grow determined by: Ø Sex ratio : the number of births closely tied to number of females Ø More females=faster rate of growth Ø Generation time : average time between birth and reproduction Ø long generations = slower growth rates Ø Age structure : many younger individuals in a population increases growth rates
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Exponential Growth Ø Consider a case where we start with a single cell, and all cells can reproduce
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Exponential growth curve Ø Clearly not linear, an exponential function N time Represents the biotic potential : the maximal rate of increase when no environmental limits are placed on growth
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This note was uploaded on 09/29/2011 for the course BIO 110 taught by Professor Bos during the Spring '10 term at Purdue University-West Lafayette.

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population - BIOL 110: Population Growth Population growth...

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