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Frog-bit looks like this, according to the DNR.

FROG-BIT: New European Invasive Weed Species Found in Saginaw Bay

NOAA Launches 5-Year Study of Multiple Stressors on Saginaw Bay

November 10, 2013       Leave a Comment
By: Dave Rogers

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Saginaw Bay has been snake bit by frog-bit.

After fighting quagga and zebra mussels, round gobi, toxic algae and with fear running high over jumping Asian Carp, something new has arisen to concern wildlife experts.

The NOAA Great Lakes Environmental Research Laboratory, Ann Arbor, in conjunction with several partner agencies and institutions, has a five year project underway to study the effects of multiple stressors on Saginaw Bay in Lake Huron.

Like many coastal areas around the world, Saginaw Bay has been subjected to numerous stressors originating from human activities. These stressors include toxic contaminants, nutrients, sediments, overfishing, exotic species, and more recently - declining water levels.

Amazingly, it has taken the frog-bit invasive weed nearly 80 years to move from Canada into the Great Lakes and into Saginaw Bay. But now it is here, nonetheless.

The Department of Natural Resources' Wildlife Division is leading response efforts to control a new aquatic invasive plant, European frog-bit (Hydrocharis morsus-ranae).

Until recently, this free-floating plant had only been reported in a few localized sites in the southeastern Lower Peninsula. Through recent statewide monitoring efforts, this species has been detected in Saginaw Bay, Alpena and Munuscong Bay in Chippewa County.

This new invasive species was detected as a result of an Early Detection Rapid Response (EDRR) pilot project funded through a federal Great Lakes Restoration Initiative grant. The project relies on partnership and collaboration including Michigan State University and Cooperative Weed Management Area groups.

The Saginaw Bay Cooperative Weed Management Area covers Arenac, Bay, Clare, Genesee, Gladwin, Gratiot, Huron, Iosco, Isabella, Lapeer, Livingston, Mescosta, Midland, Montcalm, Oakland, Ogemaw, Osceola, Roscommon, Saginaw, Sanilac, Shiawassee and Tuscola.

Using the new State of Michigan's Rapid Response Plan for Aquatic Invasive Species, developed jointly by the DNR, DEQ and MDARD, these new reports were verified, an on-site assessment was conducted and a response planned. Control measures under way include physical removal (1,500 pounds removed beginning in mid-September) and trial treatments with herbicides.

"Responding quickly to a new invasive species is critical to increasing our chances of success, and it requires a well-organized, collaborative effort between multiple agencies and other partners," said Wildlife Division chief Russ Mason.

Education, outreach and future control activities are being planned with local stakeholders and partner groups. A complete outline of the EDRR program, including future stages, is defined in the newly revised SOM Aquatic Invasive Species State Management Plan at www.michigan.gov/aquaticinvasives.

European frog-bit was accidentally released into Canadian waters between 1932 and 1939, and has since spread throughout Ontario, New York, Vermont and other eastern states. It forms extremely dense vegetative mats that cover the available open water surface. Frog-bit shades out submerged native plants, reducing invertebrate and plant biodiversity, disrupts natural water flow, inhibits watercraft movement and may adversely affect fish and wildlife habitat.

European frog-bit resembles a miniature water lily (lily pad), with leaves about the size of a quarter or half-dollar. It produces a small white flower, usually in June. Frog-bit is typically found in slow moving, shallow waters (1-3 feet), typically within cattail and bulrush stands. Additional identification information is available at the Midwest Invasive Species Information Network at www.misin.msu.edu.

If you suspect that you've seen European frog-bit, report sightings to www.misin.msu.edu or to Matt Ankney, EDRR coordinator, at ankneym2@michigan.gov or (517) 641-4903.



For more information, please visit www.michigan.gov/invasivespecies.

The Michigan Department of Natural Resources is committed to the conservation, protection, management, use and enjoyment of the state's natural and cultural resources for current and future generations. For more information, go to www.michigan.gov/dnr.



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Dave Rogers

Dave Rogers is a former editorial writer for the Bay City Times and a widely read,
respected journalist/writer in and around Bay City.
(Contact Dave Via Email at carraroe@aol.com)

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