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Lock and Dam Changes Aimed at Stopping Invasive Carp
The U.S. Army Corps of Engineers has adjusted the flow of water through a Mississippi River lock and dam in southeastern Minnesota in an effort to slow the spread of invasive carp, which have been discovered as far north as Redwood Falls in the Minnesota River.

The changes to Lock and Dam 8 near Genoa, Wisconsin, were based on recommendations from a research team led by Peter Sorensen, a University of Minnesota professor and expert on invasive carp.

Sorensen said it's the first time the Corps of Engineers has adjusted a dam's operations to prevent the spread of an invasive species.



 
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Greehouse Gas Feedback Loop Discovered in Freshwater Lakes - Up to 77% of the methane emissions from an individual lake are the result of the organic matter shed primarily by plants that grow in or near the water. This matter gets buried in the sediment found toward the edge of lakes, where it is consumed by communities of microbes. Methane gets generated as a byproduct, which then bubbles up to the surface.


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