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Tag Limnology

Walleye struggle with changes to timing of spring thaw

February 27, 2024

Newly-hatched walleye are hungry fish, dependent on meals of tiny zooplankton during the spring. As Midwestern lakes thaw unusually early or late, these prized fish can miss the dinner bell.

Mapping methane emissions from rivers around globe reveals surprising sources

August 16, 2023

The findings will improve methane estimates and models of climate change, and point to land-management changes and restoration opportunities that can reduce the amount of methane escaping into the atmosphere.

Study maps uneasy future of Wisconsin trout populations

December 20, 2022

Climate change has affected Wisconsin trout species differently: Populations of smaller, brightly colored brook trout have declined, while numbers of larger brown trout have generally increased.

Study finds that big rains bring big algae blooms… eventually

November 28, 2022

Phosphorus is only one part of the algae bloom recipe, research shows. Other key factors at play are calm winds, warm surface waters and a low abundance of tiny crustaceans called zooplankton.

UW scientist wins Blue Planet Prize

June 21, 2022

Steve Carpenter, one of the world’s foremost lake ecologists, has been awarded an international prize for scientific research that has helped provide solutions to global environmental problems.

Study finds that not even the largest lakes in the world are safe from salt

December 21, 2021

Researchers used water quality data and computer models to analyze the amount of salt being carried into Lake Michigan by 234 different tributaries, from major rivers to tiny streams.

Algae blooms a problem but not a trend, study finds

October 5, 2021

“For many, many lakes, they are a very serious problem,” says Grace Wilkinson of the UW–Madison Center for Limnology. “But algal blooms are not getting worse everywhere."

Invasive species often start as undetected “sleeper populations”

February 25, 2021

The finding has important implications for the way we approach invasive species control and management, researchers say.

Summer road trip finds small streams have big impacts on Great Lakes

October 26, 2020

While decades of monitoring and regulatory efforts have paid little attention to these tiny tributaries, Mooney’s research shows that they play an outsized role in feeding algae blooms and impacting coastal waters.

Controlling invasive milfoil with lake-wide herbicide could do more harm than good to native plants

June 11, 2020

New research could help lake managers make more informed decisions about their invasive species control strategies.

Environmental DNA shows promise in estimating sport fish populations

June 11, 2020

eDNA could help fisheries managers keep tabs on walleye health across many more lakes at a fraction of the cost of current monitoring methods.

Top limnology posts of the decade: warming, zebra mussels, algae

January 9, 2020

UW-Madison's Center for Limnology took a look back at its top posts from the past decade about the waters of Wisconsin and the world. Take a look.

Study says “hidden overharvest” from fishing plays a role in Wisconsin walleye declines

November 18, 2019

New research finds that It finds that 40 percent of walleye populations are overharvested, which is ten times higher than the estimates fisheries managers currently use.

‘Stories from the Flood’ recount suffering, resilience in Kickapoo Valley towns

November 12, 2019

“Stories from the Flood,” a collaboration involving UW–Madison, has gathered over 70 written, audio, and video interviews with people who experienced what some call a “thousand-year” flood along the Kickapoo River and nearby Coon Creek.

Scientists angle for more attention to fishing for fun

April 17, 2019

New research brings attention to the need to better manage recreational fisheries to protect the health of inland and near-shore fish populations and to preserve the recreational fishing experience.

Reddit competes to visualize Madison’s prized Lake Mendota ice data

February 12, 2019

Data visualizations generated by a Reddit competition reveal a concerning trend that’s been known to scientists at UW–Madison and elsewhere for decades: ice is disappearing on Lake Mendota.

As the climate warms, tens of thousands of lakes may spend winters ice free

January 28, 2019

A new study from an international team of researchers, including at UW–Madison, shows that many northern latitude lakes are at risk of experiencing some ice-free winters in the coming decades.