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David Kovacic from the Illinois Natural History Survey says constructed wetlands are “more fail safe” than some of the other nitrogen loss reduction practices highlighted in the Illinois Nutrient Loss Reduction Strategy. Through droughts and floods, heat waves and early frosts, these shallow depressions placed at the edge of farm fields remove an annual average of 25-60 percent of the nitrogen in water carried through tile lines.

Those reductions are key for water quality in Illinois and downstream. By most estimates, the Prairie State is the largest contributor of nutrients to the Gulf of Mexico dead zone. More than 400 million pounds of nitrate-nitrogen leave the state through the Mississippi River system each year. And according to the science assessment at the root of the state’s strategy, the bulk of that comes from the tile-drained region of central and northern Illinois.

Hear more from Kovacic, along with University of Illinois’ Lowell Gentry and The Nature Conservancy’s Maria Lemke, on the benefits of constructed wetlands in the latest video from IISG and the Illinois Water Resources Center.

Special thanks to University of Illinois Extension and the U.S. Department of Agriculture Natural Resources Conservation Service for their contributions.

 

Illinois-Indiana Sea Grant is a part of University of Illinois Extension and Purdue University Extension.

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Looking for a fun way to teach about marine debris? Check out Me and Debry, which is a whimsical, 30‑minute, audience‑participation play created for @UWiscSeaGrant. It helps students explore what marine debris is, why it matters, and how we can make a difference in the Great Lakes.The full script (English) and participation scripts (English, Spanish, and Hmong) are free to use, along with marketing materials for performances.Bring learning to life and start a conversation about litter in our waters!Check it out at the link in bio.#TeachingTuesday
Do you work or live along the Great Lakes coasts? Watch our newly released video series collection, containing several short videos that overview the range of coastal protection options in the Great Lakes, including:- Natural processes in the Great Lakes- Hard coastal protection structures and how they interact with/alter natural processes- Nature-based coastal solutions in the Great Lakes, ranging from green to gray approachesFind our two new video series at the link in bio.
Located in Washington, D.C., the Sea Grant Knauss Fellowship provides a unique educational and professional experience to graduate students who have an interest in ocean, coastal and Great Lakes resources, and in the national policy decisions affecting those resources. This is a one-year fellowship open to any student, regardless of citizenship, who is enrolled toward a degree in a graduate or professional program on the day of the deadline.Students enrolled at an Illinois or Indiana university or college should submit their applications through Illinois-Indiana Sea Grant by emailing Angela Archer at amcbride@purdue.edu. Students in surrounding states without a Sea Grant program should contact the National Sea Grant College Program at oar.sg.fellows@noaa.gov for a referral. Application deadline: June 3, 2026.To learn more about the fellowship, visit the link in bio.