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Steve McComas: How extreme temps impact a lake’s ecosystem

Bluegills in Pleasant Lake, Wright County, Minn., didn’t seem to mind the above average water temps in July. The sunfish family are warm water species and can readily handle summer water temps. (Photo by Steve McComas)

When fish start dying in Minnesota lakes in the summer, and especially when there were more than 200 confirmed fish kill reports at the end of July, it gets our attention.
Yet, the warm temps are just the tip of the iceberg. In reality, the whole lake ecosystem is affected when things really heat up.

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