6 Distribution and Abundance 9-16-09

6 Distribution and Abundance 9-16-09 - 9/17/2009 Ecology...

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Unformatted text preview: 9/17/2009 Ecology 203 Overview Geographic Distributions Populations Communities Ecosystems Applications Gregg Hartvigsen 1 9/17/2009 Geographic Distributions Analyzing Geographic Distributions Limiting Factors: Biotic Limiting Factors: Abiotic Distribution and Abundance Gregg Hartvigsen Biotic Factors Affecting Distributions Plate Tectonics Climate Glaciation Smaller-Scale Factors 2 9/17/2009 Why are there seasons? Assuming the Earth, with its atmosphere and other features, goes around sun, what else is necessary for there to be seasons? 3 9/17/2009 Turnover in lakes 4 9/17/2009 Is there a link between CO2 and Temp? 5 9/17/2009 Biotic Factors Affecting Distributions Plate Tectonics Climate Glaciation Smaller-Scale Factors 18,000 bp 28-25,000 bp 6 9/17/2009 7 9/17/2009 Key Point? Biotic Factors Affecting Distributions Plate Tectonics Climate Glaciation Smaller-Scale Factors 8 9/17/2009 Orographic uplift Ricklefs EON, p. 78 9 9/17/2009 Changes in the physical environ. lead to…. 10 9/17/2009 Changes in the physical environ. lead to changes in diversity. Geographic Distributions Analyzing Geographic Distributions Limiting Factors: Biotic Limiting Factors: Abiotic Distribution and Abundance Gregg Hartvigsen 11 9/17/2009 Rapaport’s Rule = “The generalization that geographic range sizes decrease as one moves from polar to equatorial latitudes, such that range sizes are such smaller in the tropics.” 12 9/17/2009 13 9/17/2009 Your book says this is a counter example to Rapaport’s Rule – is it? 14 ...
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6 Distribution and Abundance 9-16-09 - 9/17/2009 Ecology...

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