Climate Change and Freshwater Fish
May 3, 2022
Lakes in Wisconsin are getting warmer, and fish communities are changing as a result. Understanding recent trends and anticipating future changes can help decision-makers protect resilient populations, adapt to new conditions, and effectively communicate realistic expectations.
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An Assessment of Midwestern Lake and Stream Temperatures under Climate Change
Water temperatures are warming in lakes and streams, resulting in the loss of many native fish. Given clear passage, coldwater stream fishes can take refuge upstream when larger streams become too warm. Likewise, many Midwestern lakes “thermally stratify” resulting in warmer waters on top of deeper, cooler waters. Many of these lakes are connected to threatened streams. To date, assessments of the