By Dr. Jennifer Biederman The Driftless Area, spanning parts of Minnesota, Wisconsin, Iowa, and Illinois, is renowned for its spring-fed streams, cold water, and limestone geology. These unique environmental factors create ideal year-round conditions for trout. In streams with the most groundwater influence, both flows and water temperatures remain fairly constant...
By Dr. Jennifer Biederman If there is one thing that many degraded streams across Minnesota have in common, it’s a lack key habitat types that support trout of all stages and ages. Many degraded streams lack riffle habitat. These shallow, fast-flowing sections of a stream, characterized by their choppy water surface...
by Dr. Jennifer Biederman Riffle habitats in trout streams are essential little ecosystems that provide an ideal environment for aquatic macroinvertebrates, which are small, aquatic organisms that play a crucial role in freshwater ecosystems – and the most important food source of stream dwelling trout in Minnesota. What is a riffle?...
By Dr. Jennifer Biederman The sight of an in-stream habitat improvement project in progress can be a bit eye-opening – heavy machinery, including large excavators are working along the banks and in the stream, often moving large amounts of soil to slope the banks while digging out silted in pools and...
Standing by a newly restored stream, the benefits are often clear: the eroding banks, invasive plants, and barren channels have been replaced with gently sloped banks, deep pools, spawning riffles, and thriving native vegetation. It’s easy to see how these improvements boost fish populations by creating better habitat for food...
On October 5 close to 40 individuals joined us for a day-long behind the scenes tour of sites where MNTU has completed habitat improvement projects. Our Executive Director John Lenczewski and Habitat Director, Jennifer Biederman led the trip, sharing their knowledge of how a project is planned, executed and monitored....
By Dr. Jennifer Biederman As summer begins to wind down, July, August and early September bring a special treat for fly anglers in Minnesota: the trico hatch. Tricos, short for Tricorythodes mayflies, are a small-bodied but super important part of many trout streams' ecosystems, and they offer some of the best...
On August 4,2024 twenty conservation-minded folks gathered on the banks of Eagle Creek in Savage, MN to become certified Save Our Streams (SOS) community scientists – learning the techniques for biological and chemical water testing in streams. The effort was led by the Twin City Trout Unlimited (TCTU) Streamkeepers...
By Dr. Jennifer Biederman, Habitat Director Unobstructed pathways are crucial for stream-dwelling trout at key times throughout the year and life cycle. Trout must be able to move freely in a stream system to reach spawning and overwintering areas, find coldwater refuge in low, warm summer flows, and access feeding grounds....
By Dr. Jennifer Biederman When it comes to the diets of stream-dwelling trout in Minnesota, aquatic benthic invertebrates take most of the spotlight. Keep in mind that trout are visual and opportunistic feeders – so prey preference and capture probability are likely influenced by the accessibility, size, color, mobility, and degree...
