Lecture 5 - Lecture 5 Physiological Ecology II Review...

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Lecture 5 Physiological Ecology II Review: Physiological Ecology I Water relations Relative Humidity Terrestrial plants Terrestrial animals Key Concepts
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Review Ecophysiological limits tolerance optima Thermoregulation requires significant energy Physiological, morphological and behavioral mechanisms many employed to deal with temperature Acclimation vs. Adaptation
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Physiological and Behavioral Ecology of Organisms Population Ecology Community Ecology Ecosystem Ecology Environment (abiotic/biotic)
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Water Relations: Why is water important? Biochemical processes occur in aqueous solutions
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Water Relations: Water Content in Air Evaporation  
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Water Relations: Relative Humidity RH = water vapor density __ X 100 % saturation water density Amount of water the air CAN hold Amount of water in the air Temperature ( ° C) Saturation water vapor density (g/m 3 ) Similar fig. in book 3.16
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Water Relations: Terrestrial Organisms High rate of evaporative loss from toad Low RH Lower rate of evaporative loss from toad Higher RH
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Question At 6:00 a.m. in Phoenix, AZ the temperature is 2.7 ° C (37 F) and the RH is 78%.
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