Water test: human impact on Great Lakes waters predates quagga mussel invasion
The Lake Michigan and Lake Huron waters governed by an 1836 treaty are at the heart of negotiations between Michigan, the federal government and Native American tribes to determine how much and what kinds of fish can be harvested by recreational, state-licensed and Native American commercial fishers. Much has changed since the treaty was signed, notably because of invasive mussels. But change created by human activity was underway even before the signatories to the Washington Treaty ink dried in Washington D.C. in March 1836.
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http://greatlakesecho.org/2022/06/24/water-test-human-impact-on-great-lakes-waters-predates-quagga-mussel-invasion/