Tag: Lake Michigan

Invasive species shift Great Lakes ecosystems

A new study documents ecological changes in Lake Michigan. Photo via @NASA_EO

How will fisheries managers respond?

Staff Report

The Great Lakes have seen successive invasions by non-native species that alter the ecosystem, including quagga mussels that filter the water and remove nutrients. At least partly as a result of the invasive mussels, Lake Michigan is becoming less hospitable to Chinook salmon, according to a new study led by scientists with the U.S. Geological Survey and Michigan State University.

The scientists concluded that stocking could help sustain a population of Chinook salmon, but that the lake’s ecosystem is now more conducive to stocking lake trout and steelhead salmon. These two species can switch from eating alewife, which are in decline, to bottom-dwelling round goby, another newly established invasive prey fish that feeds on quagga mussels. Continue reading “Invasive species shift Great Lakes ecosystems”

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Grassroots support leads to proposal for new marine sanctuaries

Shipwreck areas in Wisconsin and Maryland eyed for protection

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NOAA is seeking comments on its proposal to designate two areas in Wisconsin (left) and Maryland (right) as national marine sanctuaries. (Credit: NOAA).

Staff Report

Two historic shipwreck sites could be designated as National Marine Sanctuaries under a proposal outlined by President Barack Obama at an international ocean conference today.

In a press release, the National Oceanic and Atmospheric Administration said it’s the first time since 2000 that the agency has identified new sites for that designation. NOAA is taking public comment on the proposal. Continue reading “Grassroots support leads to proposal for new marine sanctuaries”