#23 - Stream Restoration

#23 - Stream Restoration - The 10th and final lecture quiz...

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1 The 10 th and final lecture quiz 1. Define production efficiency. 2. Compare the production efficiencies (give the numbers) of: invertebrate herbivores ecotothermic vertebrates endothermic vertebrates . What is a stream? • A stream is water and sediment moving downhill under the influence of gravity. The force of gravity acting on the water (which flows readily) produces power that can be used to do work. The “work” that a stream does is to transport sediment, moving it generally downstream, but also rearranging it within the stream. • A natural stream is fed sediment and water by its entire watershed, and the sediment and water supplies are in balance through time. A stream is connected frequently to the land along its banks (riparian zone) by flooding, and the river and floodplain exchange nutrients.
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2 What is wrong with this stream? Natural streams do not run straight! (they meander) This stream has looked exactly like this for ~ 60 years!
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3 Why do streams meander? (Erosion and deposition)
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#23 - Stream Restoration - The 10th and final lecture quiz...

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