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Great Lakes suffer from invasion
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Travel Articles >> Sea Travel
Travel Articles >> Locations >> North America
Travel Articles >> Ecotourism
Alien creatures that have got into the North American Great Lakes after the creation of the canal systems 50 years ago that has connected them with the sea - bring great harm to their natural environment and local economy.

Since the opening of the St Lawrence Seaway in 1959, the ocean vessels have brought 57 alien species with them to the Great Lakes. In 2006 the damage brought to the sportive and commercial fishing and tourist and also the additional costs of water cleaning and water supply have made at least $200 million yearly. This amount does not include the damage brought to the Canadian economy and of the other USA regions, where some of the aliens also came to. The scientists note that the research did not include the period after 2006, but it is supposed that the damage only grows.

The mussel that is able to plug up the water pipes and to annihilate plankton that is also a food for other organisms - came far to the west of the USA up to Nevada and California. Such species as the usual ruff struggle with the local yellow perch and pollack, while the bullheads devastate the perch nests.

The Great Lakes United environmental organization warns that the alien species problem becomes slowly a national crisis. A new law project is being prepared that will insist on the installation of the water cleaning devices on all the ocean ships that come to any American port.
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Article Submitted On: July 18, 2008
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