“The report from the multi-institution EcoFore-Lake Erie project states that a 46 percent reduction in the amount, or load, of phosphorus pollution would be needed to shrink Lake Erie’s Central Basin hypoxic zone to a size last seen in the mid-1990s—a time that coincided with the recovery of several recreational and commercial fisheries in the lake’s west and central basins.Phosphorus is a nutrient used in crop fertilizers. Excess phosphorus washes off croplands during rainstorms and flows downstream in rivers that feed the Great Lakes. Once in the lakes, phosphorus can trigger algae blooms. When the algae die and sink to the lake bottom, oxygen-consuming bacteria feed on them and create hypoxic zones in the process. Many fish shun these oxygen-starved waters, which significantly reduce the amount of suitable habitat available to the fish.The study, accepted for publication in a forthcoming edition of the Journal of Great Lakes Research, calls for Central Basin phosphorus reductions considerably higher than other recent recommendations, including a proposal issued last year by the Ohio Lake Erie Phosphorus Task Force aimed at avoiding Western Basin toxic algae blooms. The new report is a synthesis of the major findings from the EcoFore-Lake Erie project, created in 2005 and supported by the U.S. National Oceanic and Atmospheric Administration’s Center for Sponsored Coastal Ocean Research.”
Recent News
- Tomas Höök signing off as Illinois-Indiana Sea Grant director this summer
- Illinois-Indiana Sea Grant welcomes Stuart Carlton as the program’s new director
- Four Illinois and Indiana educators will set sail on Lake Michigan aboard EPA’s research ship
- Join IISG as a new pollution prevention outreach assistant
- Beach season means it’s time for lifesaving Lake Michigan water safety resources
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As the sun sets on the 2025 Shipboard Science Immersion aboard the R/V Lake Guardian, we celebrate 15 incredible educators who immersed themselves in Great Lakes science alongside scientists from the @epa_greatlakes, @uwmilwaukee, and @purduefnr. These educators return home not only with new knowledge but also with support to incorporate hands-on, experiential learning and stewardship in their own classrooms and other learning environments.
This week-long experience was conducted in partnership with the EPA, @noaa.SeaGrant, and with funding from the Great Lakes Restoration Initiative. Hosts for the Lake Michigan immersion are the Center for Great Lakes Literacy partners, Illinois-Indiana Sea Grant, and @uwiscseagrant.

Shipboard Science Immersion educators are diving into scientific sampling alongside Dr. Paris Collingsworth, processing samples from Green Bay to study how larval fish and zooplankton communities shift from nearshore to offshore in Lake Michigan.
Back in the lab, with @purduefnr graduate student Anna Hill, the educators are sorting benthic samples, identifying the organisms collected. The relatively large quagga mussels are easy to spot!
@epa_greatlakes @nyseagraa2966 @miseagrant @ohioseagrant @uwiscseagrant @paseagrant @ilextension @noaaeducation @seagrant_noaa
#greatlakes #lakemichigan

Shipboard Science Immersion educators stepped off the ship and onto beautiful Beaver Island for a hands-on day at @cmichbiology Biological Field Station, hosted by the amazing Dr. Kevin Pangle!
From seining for fish and towing a plankton net to testing water quality with a multiparameter sonde, educators practiced aquatic science techniques that can translate to shoreside learning within their educational programming. The day wrapped with a scenic dune hike — science and nature at its best!
@epa_greatlakes @noaaeducation @seagrant_noaa

The Shipboard Science Immersion educators worked together to simulate sonar mapping and uncover the secrets of a mystery seabed, just like real underwater archaeologists!
This hands-on lesson mirrors the work of Dr. Ashley Lemke from University of Wisconsin Milwaukee who studies paleo landscapes below Lake Michigan by collecting sonar data from lakebeds. Experiences like these can be shared with youth to spark curiosity and connect them to real-world science in action.
#LakeMichigan #GreatLakes
