The mild winter is putting stress on at least a third of Minnesota's lakes. The state's shallow lakes need severe winters to kill their fish populations. Last winter sent lakes into a deep freeze, and DNR officials were hoping for a repeat performance this year. Nicole Hansel-Welch is shallow lakes program coordinator for the Minnesota Department of Natural Resources. She says partial freezes only kill predator fish, which upsets the lakes' delicate balance:
Digitization made possible by the State of Minnesota Legacy Amendment’s Arts and Cultural Heritage Fund, approved by voters in 2008.
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