Even before zebra and quagga mussels arrived in the Great Lakes in the 1980s, the future looked a little bleak for native mussels. The invaders came close to wiping them out entirely. But small populations in Lake Erie appear to not only be surviving the invasion, but thriving. 

Average density of native mussels before the arrival of zebra mussels was two per square meter in Lake St. Clair. By 1990, zebra mussel density was at 1,600 per square meter. 

“By 1992, native mussel populations are almost gone from the southeastern portion of the lake and declining rapidly in the northwestern portion of the lake,” said [Dave] Zanatta, [a biologist at Central Michigan University]. 

By 1994, there were almost no native mussels left in the lake, with zebra now at 3,000+ per square meter. 

“But there was reason for hope,” said Zanatta. “Remnant populations of native mussels were beginning to be found in coastal wetlands in western Lake Erie in the late 1990s.” 

Zanatta’s research adds further evidence that progress continues to be made on one of the impairments of the St. Clair River – the degradation of fish and wildlife habitat – that led to its classification as an environmental Area of Concern in 1985. 

His work also sheds light on the complex ecological impacts of invasive species generally. 

With some environmental observers predicting a doomsday scenario for native game fish if Asian carp are able to establish themselves in the Great Lakes, for example, Zanatta’s mussel research suggests that the outlook for native fish might be significantly more positive than forecasts suggest.

To read the full article, click on the link above. 

**Photo of zebra mussels courtesy of Michigan Sea Grant. 

Today we take a break from discussing the latest Great Lakes research to recognize one of the scientists who laid the foundation for modern water science. 

From the U.S. Geological Survey’s Science Features:  

Luna B. Leopold, son of famed conservationist Aldo Leopold, arrived at the USGS in 1950. For the next two decades, Leopold revolutionized hydrologic sciences within and outside the USGS. He is best known for his work in the field of geomorphology, the study of land features and the processes that create and change them. His work is often cited today by leading scientists in water research, both at the USGS and around the world. 

Leopold had a lasting impact on the field of water science. He knew the broader importance of our water resources and that humans can have great impact on whether water is available, now and in the future. Our society depends on safe and reliable water supplies, as do the Earth’s diverse and valuable ecosystems. Today, our nation is faced with the challenge of balancing a finite freshwater supply between competing needs, such as agriculture, drinking water, energy production, and ecosystems. 

Leopold recognized the fundamental value of science in making smart decisions about water resources and laid the groundwork for modern water science. During his tenure he transformed USGS water research into a professionally-recognized provider of water quality and availability information.

For six years, he served as a hydraulic engineer before becoming the first Chief Hydrologist in the history of the USGS, a position he held until 1966 when he stepped down to pursue his research. While at the USGS, he led the effort to restructure the water science programs to focus on viewing water as a single resource. For example, USGS continues to research the interactions between surface water and groundwater, because use of either of these resources affects the quantity and quality of the other. 

***Leopold writes down his reflections during a 1966 research expedition in Idaho. Photo courtesy of USGS. 

Scientists from Central Michigan University’s Institute for Great Lakes Research (IGLR) are expanding their basin-wide Great Lakes coastal wetlands monitoring program with help from grant funding from the U.S. Fish and Wildlife Service and the Wisconsin and Illinois-Indiana Sea Grant programs. The program is one part of a collaborative project that brings together researchers from IGLR, Notre Dame, and the University of Wisconsin-Green Bay. The results will help natural resource managers better target protection and restoration efforts. 

Researchers at the Chicago Botanic Garden are asking wetland managers across the country to join PhragNet, a collaborative network that brings scientists and managers together to improve Phragmites control strategies. From the latest issue of IISG’s The Helm: 

The idea behind PhragNet is simple. Managers provide soil and plant samples and share information about their management strategies and goals. In return, researchers use that data to better understand Phragmites invasions and help managers hone in on the most effective control and restoration strategies.   

The IISG-funded network is still in its early stages, but PhragNet co-founders Dan Larkin, Jeremie Fant, Vicky Hunt, and others have already collected data from roughly 50 participants in 15 states and Ontario. 

“There is so much we can learn by ‘crowd-sourcing’ information about how to effectively manage Phragmites-impacted wetlands,” said Larkin. “The value will increase over time as we see how sites respond to management.”

It’s day four of the Shipboard and Shoreline Science Workshop, and teachers from across the Great Lakes region are hard at work conducting field experiments alongside researchers aboard the EPA R/V Lake Guardian. The group was in Lake Erie’s Presque Isle Bay yesterday collecting water samples and hunting for invasive species. Their work, along with some of the researchers and participants, was featured on WICU 12 Erie.

“I’m going to bring this back to my classroom,” Chad Solomon, a teacher at Chicago’s Whitney M. Young Magnet High School told WICU. “We live in Chicago, but very rarely do kids actually get to the lake. I am going to be bringing this experience back to them.”

Joining the teachers at this shoreline stop and throughout the research cruise is IISG’s Kristin TePas. Kristin coordinates the annual teacher workshop, held each year on a different lake, for the Center for Great Lakes Literacy and the EPA Great Lakes National Program Office.

Sea Grant-funded researchers Sam Mason and Steve Mauro were also on board sampling for emerging pollutants like plastic and pharmaceuticals. You can learn more about Mason’s research in Lake Erie and across the Great Lakes in the latest issue of UpClose. And watch for the next edition later this month to hear from Mauro directly about his work on the Lake Guardian. 

*Photo taken during the 2010 cruise on Lake Michigan