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Two Species of Elodea Could be the Demise of Alaska’s Pristine Waters
Two species of elodea have been found recently in a handful of lakes and sloughs in Alaska. While native in some of the lower 48 states, these species are the first invasive aquatic weeds in Alaska.

A big concern is how the alien weed will degrade fish habitat for species such as salmon, trout and grayling. Another is how to stop the spread.

Floatplanes are a diabolically effective way for the plant to colonize new lakes and rivers. In September, Steve Swenson, with the US Forest Service conducted an aerial study landed on elodea-infested Martin Lake. Before departing the aquatic plants were carefully removed from the rudders of the float plane.

However, shortly after takeoff a piece of elodea was noticed on the rudder. Unfortunately there was nothing that could be done and shortly before landing at Hinchinbrook Island, the hitch hiker was gone.

 
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Gender-bending Chemicals in Water Supply - Researchers from the University of Calgary sampled populations of longnose dace, a silvery minnow, in Alberta’s Oldman and Bow Rivers. The Bow River flows through downtown Calgary and supplies its drinking water. Samples were taken back to the lab and dissected for further analysis and biologists then noticed that the random catch was overwhelmingly female.


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