MINNEAPOLIS -- Just as humans need clean air to breathe, lakes need healthy oxygen levels to provide habitat for fish species. But a new study said in Minnesota and around the world, freshwater lakes are in trouble with temperatures on the rise.

The research, published in the journal Nature, looked at nearly 400 lakes across the globe, including more than 80 in Minnesota.

It concluded, driven by climate change and warming temperatures, lake oxygen levels are declining as much as nine times faster than oceans.

Kristen Blann, freshwater ecologist for The Nature Conservancy, said if mitigation efforts aren't prioritized, Minnesota lakes and fish could look a lot different in the coming years.

"What we end up with is the opportunistic generalists that can survive extremes and poor conditions, and we'll lose many of the species that we most appreciate for the unique ecosystems that they represent," Blann explained.

For example, lake trout could be affected because they need cold water with ample oxygen levels to survive. And with other research that puts Minnesota among the fastest-warming states, Blann pointed out it creates a greater sense of urgency, as habitats could see dramatic change much sooner.

Gretchen Hansen, assistant professor in the Department of Fisheries, Wildlife and Conservation Biology at the University of Minnesota and a co-author of the study, said there's another side effect to worry about.

"As lakes warm, the bacteria that can live in those oxygen-depleted waters are bacteria that produce methane," Hansen noted. "And so, the lakes will produce even more greenhouse gases, contributing even more to global climate change."

Blann added The Nature Conservancy is working with the state and other partners on programs to protect the watersheds feeding into freshwater lakes, to help make them more resilient.

"The more we can minimize the amount of exposed soil, and concrete and pavement, the healthier those watersheds will be," Blann asserted.

A key example she cited is conservation work in agriculture to reduce nutrient runoff from farm fields. Meanwhile, Minnesota researchers plan to take a more detailed look at declining oxygen levels in lakes around the state.

Despite some progress, Pennsylvania and other states in the Chesapeake Bay Watershed are unlikely to meet their 2025 pollution commitments to reduce nitrogen, phosphorus and sediment pollution. An assessment by the Environmental Protection Agency's Chesapeake Bay Program reveals that more than two-thirds of the Bay and its tidal rivers did not meet clean-water standards between 2020 and 2022.

Harry Campbell, science policy and advocacy director with Pennsylvania office of the Chesapeake Bay Foundation, said pollution levels vary based on land use, local economies and population, and stresses that a stronger workforce is essential for Pennsylvania to meet its goals.

"There simply are not enough scientists, engineers and planners, even in some cases, construction crews and equipment to meet the demands for conservation assistance that landowners, that farmers and communities are asking for and have resources dedicated for the implementation of those practices," he said.

Campbell noted that Gov. Josh Shapiro reaffirmed Pennsylvania's commitment to bay restoration in June. The $220 million Pennsylvania Clean Streams Fund addresses major river and stream impairments and includes a program to help farmers adopt sustainable practices. This year's state budget also allocates an additional $50 million to the fund, ensuring ongoing support for programs like the farmer-focused cost-share initiative.

Campbell said an updated Bay agreement would unify efforts toward healthy rivers, streams and a vibrant Chesapeake Bay by focusing on the performance and cumulative impact of conservation practices. New technologies help identify specific locations for these practices, optimizing their effectiveness in restoring and protecting the ecosystem.

"One of the things is something like the emerging tools that allow us to actually identify on an individual landscape where to put a conservation practice literally down to the foot, instead of five feet over there. In another place, you put that practice in this location, and it has more effectiveness," he continued.

Campbell added that governors and other leaders from the Chesapeake Bay region, will meet on December 10th. The foundation urges in-person attendance from all members, including the governor, to discuss and commit to updating the Chesapeake Watershed agreement by the end of 2025. This update is designed to address new challenges and incorporate the latest science.

New data show lead levels in Syracuse's drinking water are higher than those in Flint, Michigan, and Newark, New Jersey.

The city's tests show lead levels are at 70 parts per billion with more than 14,000 homes containing lead pipes.

Erik D. Olson, senior strategic director for health at the Natural Resources Defense Council, noted along with corrosive lead pipes, other factors make it a precarious situation.

"When cities have not been doing the kind of upkeep that they need to do and pulling out these lead pipes when they come across them, or having an affirmative program to remove them, which some of the cities that are sort of looking forward have been doing for years, what we have is these situations where we are one mistake away from a public health crisis," Olson contended.

To remedy it, Olson feels the city must better inform residents, noting public officials downplaying the severity of this can lead to long-term health impacts. He believes Syracuse should provide residents with certified water filters to remove lead and premixed baby formula so families are not making it with lead-contaminated water.

Another way the city can reduce lead levels is by re-evaluating how it treats water so lead is caught quickly. If there are legal impediments or the city cannot access a home, Olson said Syracuse has to do what places like Newark did in the same situation.

"Adopt a local ordinance that said that any adult occupant of the home can give permission to replace the lead pipe," Olson urged.

He added the city must ensure the water utility picks up the tab since billing homeowners could be an environmental justice issue. Replacing every lead pipe in Syracuse could cost as much as $98 million but the federal Bipartisan Infrastructure Law allocates $15 billion for lead pipe replacement.

October is National Seafood Month and the fish on your plate might not be coming from where you think.

The U.S. imports 90% of the seafood it consumes. Offshore fish farming has come to dominate wild harvest in recent decades, with farmed salmon making up 80% of global salmon supply. Oregon does not have regulations to stop the practice.

Johnny Fishmonger, executive director of the group Wild Salmon Nation, said legislation proposed in Congress could make fish farming more prevalent in federal waters. He compared large-scale fish farming practices to dairy and poultry farms.

"It's like on land -- concentrated animal feedlot operations, CAFO -- so concentrated aquaculture feedlot operations where the fish are farmed intensely in high densities," Fishmonger explained.

Fishmonger noted sea lice infestations are common and devastating problems for fish farms. The AQUAA Act would allow aquaculture companies three miles offshore in federal waters. The SEAfood Act would create aquaculture assessment and grant programs. Supporters of large aquaculture operations said they are needed to feed the world's population.

Fishmonger stressed the aquaculture companies wanting to operate in federal waters are not mom-and-pop operations.

"One of the real distressing parts of that is there's no such thing as a small, family owned fish farm, except for like trout farms on land," Fishmonger contended. "Every farm in the ocean has been taken over by huge, multinational corporations."

Rob Seitz, a fishing boat captain, who opened South Bay Wild Fish House in Astoria, said there is other legislation to boost his line of work, the Domestic Seafood Production Act. The bill would require congressional approval for offshore aquaculture operations and invest in local fishing communities. Seitz argued fewer fish farms would be good for the environment.

"Wild catch fishing has the lowest carbon footprint of any form of food production," Seitz pointed out. "All of our fisheries in this country are sustainable pretty much now."


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