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Unformatted text preview: Physiological Ecology 2 4 June 1 Physiological Ecology Physiological Ecology study of how organisms are able to survive and function in their environment Tolerance capacity of an organism to survive or reproduce when subjected to a stressful environmental factor Temperature Fitness Sp. A Sp. B Sp. C Tolerance Curves Physiological Ecology 2 4 June 2 How do organisms react to environmental variation in temperature How do organisms react to environmental variation in temperature ? Thermal regulators (homeotherms) maintain a constant body temperature Thermal conformers (poikilotherms) body temperature varies with environmental temperature. Endotherms produce their own body heat (shivering, oxidizing brown fat) Ectotherms obtain their body heat from the environment What are the costs and benefits of thermal regulation? What are the costs and benefits of thermal regulation? Examples: most invertebrates, fish, amphibians, reptiles Examples: birds and mammals Metabolic Rate amount of energy used per time unit C 6 H 12 O 6 + 6O 2 6CO...
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This note was uploaded on 01/06/2010 for the course EVE 101 taught by Professor Strong,d during the Spring '08 term at UC Davis.
- Spring '08