Scientists are building a sensor network to spot Lake Huron water chemistry trends. It’s a first step toward a hoped-for system that would track carbon dioxide and pH in all five Great Lakes.
near Alpena, Michigan. One measures carbon dioxide pressure in the water column and the other pH. Additionally, crews are collecting water samples at varying depths within the 4,300-square-mile area for chemical analysis.
Data also is needed from lakes Erie, Michigan, Ontario and Superior, she said. All are part of the world’s largest surface freshwater system but have distinct characteristics, including water chemistry, nutrients and other conditions needed for healthy biological communities. Scientists in Taiwan experimented with Chinese mitten crabs, an Asian delicacy but an invasive species elsewhere. Increasing water acidity in lab tanks to projected 2100 levels more than tripled their mortality rates, according to a report last year.
“I honestly don’t see this as a thing that we as lake scientists should be freaking out about,” Stanley said. “There are so many other challenges facing lakes that are larger and more immediate,” such as invasive species and harmful algae. A crucial question is the effect of CO2-related acidification on microscopic plants called phytoplankton, said Beth Stauffer, a University of Louisiana at Lafayette biologist studying the situation around river mouths where fresh and ocean waters meet.
Of particular interest for the Great Lakes are quagga mussels, said Harvey Bootsma, a University of Wisconsin-Milwaukee lake scientist. The prolific invaders have elbowed aside other plankton eaters and fueled nuisance algae. Acidification could weaken quaggas’ calcium carbonate shells, as it has withBut that’s hardly a silver lining, Errera said. The same fate could befall native mussels that conservationists are struggling to protect.
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