University of Wisconsin at Madison researchers estimated that the cisco, a cold water fish and important food source for many of Wisconsin’s iconic game fish, could disappear from most of the state’s lakes by 2100 because of the warming climate. In a new study in the journal PLoS One, lead author Sapna Sharma found that climate change could pose a greater risk to the cisco than even invasive species such as the rainbow smelt. "By 2100, 30 to 70 percent of cisco populations could be extirpated in Wisconsin due to climate change," said Sharma. Cisco are found in approximately 170 inland lakes in Wisconsin currently, but face risks above habitat loss from invasive species because it depends on colder water.
 
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