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Scientists Develop a Model to Map Invasive Species
There has been a well-documented boom in global shipping over the past 20 years and this has led to growing numbers of aquatic invasive species moving via ballast tanks, or by clinging to hulls.

Scientists have developed the first global model that analyses the routes taken by marine invasive species. The researchers examined the movements of cargo ships around the world to identify the hot spots where these aquatic aliens might thrive.

One of the most celebrated examples of invasives is the Zebra mussel. They travelled by cargo ship from the Black Sea to the Great Lakes in North America in 1988. The invaders have caused severe economic problems as they have multiplied rapidly, clogging water pipes. At one point, they cut off a town’s water supply.

 
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Invasive Green Crab Could Threaten Marine Life - European green crab is one of the most globally-successful invasive species, and established populations are problems in Australia, South Africa and the East Coast of the United States. Where abundant, the crabs have been blamed for damaging shellfish harvests and decimating sea grass beds.


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