302 notes 6

302 notes 6 - 1 1 Help Wanted : Arid Ecosystems, Climate...

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Unformatted text preview: 1 1 Help Wanted : Arid Ecosystems, Climate Change, Sustainability, Urban Ecology- volunteers and part-time research assistants 2 Adaptation to Life in Varying Environments 2 3 Optimal Foraging Theory • Costs and benefits of decisions • Expectation: yield greatest benefits • Central Place Foraging – Prediction: maximize amount of food per unit of time 4 Optimal Foraging Model 3 5 Prediction: b travel time B Figure 9.18 b # prey per trip 6 Models have assumptions p. 192-196 Ricklefs, p 125-126 Cain • Risk • Food choice • Diet mixing • Nutrients, not energy 4 7 Significance • Understand adaptation if ignore spatial and temporal variation? • Most traits evolved in response to variation in envt. conditions 8 Life histories and evolutionary fitness 5 9 Educational Goals Be familiar with these ideas and examples to illustrate: • What is meant by life history • Life history as evolutionary solution to environment, how constraints shape life history (e.g. David Lack) • Trade offs (growth vs. fecundity, r-K, Grime’s scheme) • Parity • Parental investments 10 What is life history?What is life history?...
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This note was uploaded on 09/16/2008 for the course ECOL 302 taught by Professor Pavao during the Spring '08 term at Arizona.

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302 notes 6 - 1 1 Help Wanted : Arid Ecosystems, Climate...

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