Essay
In Lake Tahoe, located in California and Nevada, algal growth historically occurred down to more than 100 meters. But since about 1960, increased human activity has caused a change in the lake; algal photosynthesis now occurs only down to between 40 and 60 m. What changes in the lake could account for this change in the depth of the photic zone?
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The depth of a lake's photic zone is det...View Answer
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