Invaders

Recent Stories

Great Lakes exports mussels, advice and reporter to Texas

A clump of invasive zebra mussels. (Photo: U.S. Fish & Wildlife Service)

Clean, drain, dry is common advice among the Great Lakes boating community. Now it’s delivered with a southern drawl. The watercraft maintenance practice limits the spread of invasive species between lakes. And now it is used in Texas to limit the further spread of a Great Lakes menace threatening lakes in that state. Zebra mussels are again the target.  They entered the U.S. through the Great Lakes aboard freighters that inadvertently transported them from Eurasia. Continue Reading →

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Finding a balance in Lake Huron’s fishery

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About a decade ago, Lake Huron’s fishing was not very abundant because of a steep decline in fish numbers. To see how the lake is doing now, Current State’s Melissa Benmark spoke with David Fielder, Fisheries Research Biologist for the Department of Natural Resources and a doctoral student at Michigan State University. Fielder explained that the decline ten years ago was due to ecological changes after the invasion of zebra mussels, quagga mussels and a higher predator abundance. Continue Reading →

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Month in review: Carp and Waukesha

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At the end of each month, we check in with Echo commentator Gary Wilson for updates on environmental stories from around the Basin. Click on the audio clip above for today’s Great Lakes Month in Review which discusses efforts to keep Asian carp and Waukesha, Wis.,  out of Lake Michigan. This segment is produced as part of a partnership with  WKAR’s Current State public affairs program. More radio news about the Great Lakes environment can be found on Current State every Tuesday as part of our partnership. Continue Reading →

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Wisconsin officials cut diseased trees at state park

Distribution of beech scales in Michigan in 2011. Image: Michigan Department of Natural Resources

Wisconsin State officials are cutting down trees in Whitefish Dunes State Park in Door County that are infected with beech bark disease. The park has lots of beech trees and those that are infected pose a safety hazard, said Linda Williams, a Wisconsin Department of Natural Resources forest health specialist. Weakened limbs and trunks can snap off or fall over during strong winds. The idea is to remove dead trees before they harm visitors or staff. Infected trees that are within 75 feet of park trails are targeted, said Arnie Lindauer, a program analyst for the park. Continue Reading →

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Maps show spread of aquatic invasive species over time

This screen shot shows the spread of zebra and quagga mussels in 2006. (Image: The Nature Conservancy)

The Nature Conservancy has animated how six invasive species have spread across the Great Lakes over time. The group has created six maps that show population increase and spread since the appearance of each species in the Great Lakes basin and beyond. Sea lamprey, the first of the six invasive species to appear in the area, initially showed up in Lake Erie in 1921. The map shows the population of the fish expanding into the rest of the Great Lakes up until present day. Also included in the maps are Asian carp, zebra and quagga mussels, round goby, Eurasian Ruffe and black carp. Continue Reading →

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