University of Wisconsin–Madison

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Missed Connections: Walleye Struggle with Changes to the Timing of Spring Thaw

FOR IMMEDIATE RELEASE: 2/26/24 – Walleye are one of the most sought-after species in freshwater sport fishing, a delicacy on Midwestern menus and a critically important part of the culture of many Indigenous communities.  They are also struggling to survive in the warming waters of the Midwestern U.S. and Canada.  According to a new study …

Letter to the Editor: No, Madison’s Lakes Aren’t “Dead.”

The following is the Center for Limnology’s response (published Sunday, February 18) to a disheartening letter to the editor of the Wisconsin State Journal that proclaimed our lakes “dead” and declared it was time to give up on them. Needless to say, we did not agree!  Adam Hinterthuer, Grace Wilkinson and Hilary Dugan 2/18/24 – The recent letter …

Researchers Identify Five “Phases of Recovery” for a Nutrient Polluted Lake

by Adam Hinterthuer – When it comes to easing a lake’s water quality woes, there’s no such thing as a quick fix. Lakes and reservoirs across the U.S. suffer from problems like excessive algal growth and deep water “dead zones,” both of which are fueled by human development, agriculture and other land use changes sending …

Scientists Map Methane in World’s Rivers and Streams, Find Surprising Sources and Human Impacts on Emissions

Freshwater ecosystems account for half of global emissions of methane, a potent greenhouse gas that contributes to global warming. Rivers and streams, especially, are thought to emit a substantial amount of that methane but the rates and patterns of these emissions at global scales remain largely undocumented. Now, thanks to an international effort to better …

Summer Snapshot: Studying Small Ponds’ Impact on Madison’s Biggest Lake

by Anna Mueller – A team at the Center for Limnology is spending the summer monitoring urban ponds in Middleton, a city of roughly 20,000 people nestled on the western end of Lake Mendota. Urban ponds are usually designed for one of two purposes – recreation, like fishing or kayaking and water retention, to slow …

Flipping Rocks on a Friday, Mason Polencheck Hunts for Mudpuppies

By Maddie Gamble – Earlier this summer, I headed out on South Trout Lake with University of Wisconsin undergraduate Mason Polencheck on a mission – to find at least one, single mudpuppy  (Necturus maculosus). Mudpuppies are the only fully aquatic species of salamander in Wisconsin. Surveying and collecting data on these animals is a tedious …