Earlier this month, officials in Michigan announced that genetic material from silver carp, a species of Asian carp, had been discovered in the Kalamazoo River around 20 miles upstream from where the river flows into Lake Michigan. It was the first time a positive sample of eDNA had been found that close to the lake. 

The results drew national attention and had many concerned that it wouldn’t be long until the infamous invader entered the Great Lakes. Further testing, though, reveals that there is no evidence of Asian carp in the river, Lake Michigan, or any of the other Great Lakes. 

Clean boating includes preventing the spread of aquatic invasive species (AIS). It was a banner year for Clean Boats Crew, an outreach effort that gives boaters, anglers, and others the information they need to stop the spread of AIS. During its four-year tenure, the volunteer program has spread the word about AIS prevention to more than 8,000 recreational water users in Illinois and Indiana, with more than 3,500 people reached this year alone.

In Illinois, site leaders and volunteers introduced water users to three simple steps at the heart of the prevention campaign Be a Hero – Transport Zero™:

–Remove plants, animals, and mud from all equipment
–Drain all water from your boat and gear
–Dry everything thoroughly with a towel

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. 

The U.S. EPA announced a new plan to improve water quality and restore habitats in the Great Lakes earlier this week during a meeting of region’s mayors in Chicago. The five-year plan, known as the Great Lakes Restoration Initiative Action Plan II, calls for a dramatic expansion of urban stormwater management projects and a more than 1,400 ton reduction in phosphorus fertilizer runoff. It also roughly doubles the number of acres covered by efforts to control invasive species and requires that new wetlands include plants that can thrive as climate change brings warmer temperatures.   

From The New York Times

It builds on a four-year initiative, begun in President Obama’s first term, that has already spent $1.6 billion on more than 2,100 restoration projects on the lakes’ American side. The added initiative, which extends through 2019, is expected to cost roughly the same. 

The government says the project is the largest conservation program in the nation’s history, involving 15 federal agencies and the eight Great Lakes states. Read more 

In addition to laying out new strategies, the latest phase of the Great Lakes Restoration Initiative continues efforts to clean up Areas of Concern across the region, where polluted water and contaminated sediment pose a risk to wildlife and public health. Five of these largely industrial rivers and harbors have been restored in the last four years, and 10 more are slated for cleanup by 2019. 

When researchers and the media talk about Asian carp reaching the Great Lakes, they are typically referring to bighead and silver carp, the two voracious phytoplankton eaters that are wreaking havoc in places like the Mississippi and Illinois rivers. But the species most likely to establish in Lake Erie may actually be a third member of the Asian carp family: grass carp. 

From The Voice: 

“Grass carp are a different kind of fish and pose different kinds of risk than bighead and silver carp,” said Jeff Tyson, administrator of the Lake Erie Fisheries Program Administrator for the Ohio Department of Natural Resources. Tyson addressed a meeting of environmental writers at Ohio State University’s Stone Lab in Lake Erie on Aug. 18. “We know we have some grass carp in the system. Grass carp impact the system through their impacts on structure and vegetation. They consume huge amounts of vegetation.”

Grass carp could put Lake Erie at risk “by damaging habitats and damaging fish in communities given the documented reproduction of grass carp in large rivers,” according to the Ohio Asian Carp Tactical Plan, 2014-2020. “Grass carp can also decimate submersed aquatic vegetation that is critical to migrating waterfowl and other water birds.” Read more. 

**Photo courtesy of Eric Engbretson, US Fish and Wildlife Service, Bugwood.org. 

“I am constantly looking for workshops, classes, and events that I can attend and bring what I learned back to my class. Each adventure adds to our classroom and allows the students to learn something new. 

I was very excited when I was selected for the B-WET workshop in June of 2013. After the workshop, I added an entire unit on invasive species in the Great Lakes area for the 4th graders and another unit on restoration for the 3rd graders, plus I expanded the watershed unit I was teaching to the third graders. At the end of the units, I invited a guest speaker from the Amboy Marsh, Greg Hunter, to speak to all my classes about the Amboy Marsh and invasive species in our area. We then went to the Amboy Marsh, where the students pulled the invasive Garlic Mustard plant and cleaned away brush. The staff also arranged for guest speakers to talk about turtles, birds, and plants and gave a walking tour of the marsh. My colleagues and I are hoping to continue working with Amboy Marsh when we do our invasive species unit and our restoration unit each year.

The students loved learning about the invasive species! We used the cards from the Sea Grant curricula and played games, such as Beat the Barriers. The students also did research on the various species and used the watch cards. When Mr. Hunter came in to speak, the students had background information on invasive species and were able to connect with what he was discussing.  

This summer, I took part in the NOAA Teacher at Sea Program in the Gulf of Mexico. While on the ship, I worked with NOAA scientists and the crew to learn about the Gulf ecosystems first-hand and watch real science in action. I was on the midnight-to-noon shift for 16 days. We traveled to “stations” across the Gulf where we dropped the trawling net, the bongo nets, and the CTD (conductivity, temperature, and depth) sensors as part of the Groundfish Survey. Once the nets were brought up, we would count, measure, weigh, and record the sex of all the species. Our main objective was to collect information and send it to federal agencies that used it to set the shrimp season and catch limits.

As a result of this experience, I am working on adding more information to our invasive species unit and creating another unit that will have the students trace the water from the Great Lakes watershed to the Gulf of Mexico. We will be following the NOAA Ship Oregon II as they go out for the fall Groundfish Survey and adding that information to the data collected while I was aboard this summer. We will be watching the water’s oxygen levels as the ship travels across the Gulf and will try to figure out what might be the cause of any changes.  

Tying both the B-WET workshop and my experience on a working research ship together will allow the students to see how everyday science is touching our lives.”