Illinois-Indiana Sea Grant’s Tomas Höök, associate director for research, was part of a team of researchers involved in a comprehensive study on Lake Erie’s health and measures needed to protect it.
“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.”
Read the rest of the article at the link above.
Illinois-Indiana Sea Grant’s environmental social scientist Caitie McCoy informs and engages communities about important Great Lakes cleanup and restoration projects that affect them, and works with students to teach them more about Great Lakes ecology. One of her most recent opportunities to work with students was in Sheboygan, Wisconsin, where she provided information and lessons about a project close to home.
Caitie writes, “I visited Sheboygan, Wisconsin last Tuesday and spoke to high school biology students, answering questions about the Great Lakes Legacy Act dredging project happening just two miles from their school. This was my final school to visit in Sheboygan as part of a 12-school, countywide tour, which began this past October and reached about 600 high school science students. Now the students know the purpose of a cleanup happening right in their downtown, and they understand the science behind it.
IISG is a collaborating member of Sheboygan’s ‘Testing the Waters’ program, through which students visit some of the Sheboygan River cleanup and habitat projects and learn techniques for testing water quality. My classroom visits helped set the stage for this program, and IISG also provided water sampling instruments for their use. Some of the specific topics that we discussed with students included the chemical qualities of the pollution, the effects that pollution has on the food web, and the cleanup process under the Great Lakes Legacy Act. I also spoke with them about habitat restoration projects, which are removing invasive species, creating natural, softened shorelines, and improving filtration of runoff.
This project is part of a larger effort to provide students with stewardship opportunities and supplemental hands-on education about remediation and restoration efforts throughout the Great Lakes. It has been great to work with students in Sheboygan and Northwest Indiana, and I look forward to bringing this program to more Great Lakes students soon.”For more information about Great Lakes educational programs and opportunities, visit our education page and follow our posts here on the blog.
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Community outreach specialist Kristin TePas rinses a
PONAR dredge used to collect sediment containing
benthic organisms. |
IISG staff members
Paris Collingsworth and
Kristin TePas are sailing on the research vessel
Lake Guardian this week on both Lake Michigan and Lake Huron, assisting the U.S. Environmental Protection Agency with its annual monitoring program. The USEPA’s Great Lakes National Program Office is responsible for monitoring the offshore water quality for all five of the Great Lakes in order to assess their health. The water quality surveys take place every spring and summer and include, among other things, assessments for phosphorus and dissolved oxygen in the open waters, as well as phytoplankton, zooplankton, and benthic (bottom-dwelling) organisms.
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IISG Great Lakes ecosystem specialist
Paris Collingsworth deploys a net to
collect zooplankton. |
From the U.S. EPA:
“The Great Lakes National Program Office (GLNPO) of the U.S. Environmental Protection Agency (USEPA) is responsible for monitoring the offshore water quality of the Great Lakes to evaluate water quality over time and identify any emerging water quality problems. Comprehensive water quality surveys are conducted in all five Great Lakes in both the spring, when the water is cold and well mixed, and in the summer, when the lakes are biologically active. The R/V Lake Guardian is currently being used to conduct the summer water quality survey.”
More information about the EPA’s Great Lakes monitoring program is available
at their site.
Fourteen teachers from throughout the Great Lakes basin embarked on the learning opportunity of a lifetime this month, taking part in a week-long workshop aboard the U.S. Environmental Protection Agency’s research vessel
Lake Guardian. They explored first-hand Lake Huron’s geology, limnology (freshwater science), and ecology, with a special focus on the food web as it relates to Huron’s fisheries.
The teachers worked side-by-side with scientists learning a great deal about what comprises research on the Great Lakes. They assisted with the collection of planktonic and benthic organisms, as well as gathering water quality data. They also explored Great Lakes curriculum and discussed how to integrate this information in their classrooms. You can see visit their blog and learn more at cossegreatlakes.net. This program is offered annually by
EPA’s Great Lakes National Program Office and the
Great Lakes Sea Grant Network. If you are an educator, consider applying next year for the cruise on Lake Ontario!
The term “food web” is used to describe the intricate relationships between the many different plants, animals, and organisms that can exist in small or large areas. Understanding food webs in specific environmental locations, such as in one or more of the Great Lakes, can help researchers and communities better respond to changes in those delicate systems. Invasive species are just one example of a potential influence that can drastically alter a food web and have substantial impacts on native environments.
On April 3 and 4, 2012, Illinois-Indiana Sea Grant (IISG) and GLRRIN Lake Michigan
partners from Wisconsin Sea Grant(WISG), Michigan Sea Grant, the NOAA Great Lakes Environmental Research Laboratory, the US EPA Great Lakes National Program Office, and the USGS Great Lakes Science Center hosted a research meeting in Ann Arbor, MI. Approximately 60 researchers from federal, state, university, tribal, and non-profit organizations gathered to discuss their current understanding of food webs in Lake Michigan. Food web structure and function can be affected by many variables, including changes in water temperature, water quality, and/or habitat loss. Recent aquatic invaders, including zebra and quagga mussels, have drastically altered the Lake Michigan ecosystem, leaving researchers with new questions about what variables most affect commercial and recreational fishing, bird populations, non-toxic algal blooms, and overall quality of life for humans and animals.
GLRRIN Lake Michigan hosted a similar meeting in 2008, which helped launch the 2010 Lake Michigan Intensive Monitoring Field Year. Findings presented during the 2012 meeting highlight the inherent variability of Lake Michigan, especially in areas that are less than 20 m deep. Researchers also stressed the need to further understand how the lowest levels of the food chain, such as microbes and nutrient cycling, operate. Understanding these basic levels will help create better tools for decision makers like fishery managers or watershed planning committees. A full report on the meeting presentations and discussions will be made available through the GLRRIN Lake Michigan and IISG websites.
