Great Lakes Environmental Directory Great Lakes Great Lakes environment Great Lakes grants exotic species water pollution water export drilling environment Great Lakes pollution Superior Michigan Huron Erie Ontario ecology Great Lakes issues wetlands Great Lakes wetlands Great Lakes Great Lakes environment Great Lakes watershed water quality exotic species Great Lakes grants water pollution water export oil gas drilling environment environmental Great Lakes pollution Lake Superior Lake Michigan Lake Huron Lake Erie Lake Ontario Great Lakes ecology Great Lakes issues Great Lakes wetlands Great Lakes Resources Great Lakes activist Great Lakes environmental organizations Great Lakes Aquatic Habitat air pollution alien species threatened rare endangered species ecological Great Lakes information Success Stories Great Lakes Directory Home/News Great Lakes Calendar Great Lakes jobs/volunteering Search Great Lakes Organizations Take Action! Contact Us Resources/Links Great Lakes Issues Great Lakes News Article About Us Networking Services

Great Lakes Article:

Are invaders riding on ships' hulls?
By Jeff Alexander
Grand Rapids Press
Published January 17, 2008

MUSKEGON -- Disinfecting ballast water in ocean freighters may not keep the ships from importing more foreign species into the Great Lakes, according to a new study.

The reason: Some foreign species enter the lakes on the hulls of ocean freighters, according to a study by University of Notre Dame biologists John Drake and David Lodge.

The scientists claim the problem, called hull fouling or biofouling, may pose as serious a threat to the Great Lakes as exotic species imported in a freighter's ballast water tank.

"Overall invasion risk from biofouling may be comparable or exceed that of ballast water discharge," Drake and Lodge said in an article published recently in the scientific journal Aquatic Invasions.

Congress has been debating legislation for several years that would regulate ballast water discharges from freighters. The U.S. Coast Guard, which regulates the shipping industry, also has been working for years on a ballast water discharge standard for ocean freighters that visit Great Lakes ports.

Previous proposals did not address the ships' hulls.

Conclusions from the study were based on samples collected from the hull of a South American freighter drydocked in Ontario. They found between 100 and 200 different species on the ship's bottom, including eight that have not yet been documented in the Great Lakes.


This information is posted for nonprofit educational purposes, in accordance with U.S. Code Title 17, Chapter 1,Sec. 107 copyright laws.
For more information go to: If you wish to use copyrighted material from this site for
purposes of your own that go beyond "fair use," you must obtain permission from the copyright owner.

Great Lakes environmental information

Return to Great Lakes Directory Home/ Site Map