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lecture29F06 - What can we learn from desert organisms By...

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What can we learn from desert organisms? By the end of this lecture you should be able to… Describe where deserts occur and why. Contrast three general strategies of coping with drought. Concepts and terms: avoidance, maintenance and tolerance. Describe a few strategies for the maintenance of high tissue water potential in plants. Concepts and terms: stem succulent, stem photosynthesis, leaf morphology, stomatal responses. Describe a basic tradeoff in evolution of gas exchange capacity for plants and animals. Concepts and terms: water use efficiency Give examples of behavioral and morpholigcal adaptations to desert life. Discuss the role of the vertebrate kidney in in conserving water. Describe the physiology and anatomy of the vertebrate nephron Assigned reading: Text: p1100-1101, Concept 44.1, 44.2, 44.4, References: Chapter 14, Light and temperature ; Chapter 18, Plant water dynamics; Terrestrial Plant Ecology; Barbour, Burk, Pitts, Gilliam and Schwartz.
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North American deserts.
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Sonoran Desert.
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The Great Basin Desert.
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Atriplex hymenelytra in the desert southwest. White leaves?
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Mormon tea in the desert southwest. Where are the leaves?
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