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Common Carp Damage Minnesota Waters
Researchers analyzed data from over 2,000 Minnesota lakes, covering three major ecoregions of Great Plains, Eastern Temperate Forests, and Northern Forests. They also conducted whole lake experiments in six lakes in which they established what the current carp populations were, surveyed plant cover and identified species richness both before and after removing carp.

Researchers found that when common carp were prolific, plant cover was reduced to less than 10 percent and species biodiversity was halved. By analyzing the impacts of other human-caused stressors, the researchers revealed that carp had a greater impact on aquatic plant biodiversity than human watershed development did (urban and agriculture).

The study also showed that removing common carp increased plant cover, species richness and water clarity.



 
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Operated by the EPA, the Lake Guardian Collects Date on the Great Lakes - The U.S. Environmental Protection Agency's largest research vessel, the Lake Guardian, visits each of the five lakes to measure basic water quality and sample the “lower food web” — the tiny animals, plants, and algae that support fish and other aquatic life.


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