Chapter 18 0Fall 2007 Lecture Notes

Chapter 18 0Fall 2007 Lecture Notes - Populations...

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1 Populations Communities Ecosystems individuals of the same species in a given area share gene pool populations of all species in a habitat all organisms + physical environment Population Demographics clumped nearly uniform random Population Distribution Patterns Fig. 28.1 most common very rare Clumped Distributions schools of fish clumps of cottonwood trees clusters of monarch butterflies
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2 clumped nearly uniform random Population Distribution Patterns Fig. 18.1 population growth per unit time net population growth rate per individual per unit time number of individuals = X Population Growth (net reproduction / individual/time) p.491 Fig. 18.3 Population Growth Bacteria in the human mouth Effect of Deaths on Rate of Increase in Two Bacterial Populations 25% die between cell divisions Both populations reproduce every 30 min Fig. 18.4
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3 Factors Limiting Population Growth? Fig. 18.5 population growth per unit time Maximum net population growth rate per individual per unit time number of
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Chapter 18 0Fall 2007 Lecture Notes - Populations...

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