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Invasive species 'spread around world in ships' ballast tanks' http://apocadocs.com/s.pl?1247596064
Creatures such as the Chinese mitten crab, which is on the rise in the Thames and other English rivers, have been able to establish themselves in new habitats after being transported from their natural homes in ballast water.
Around 7,000 marine and coastal species travel across the world's oceans every day, a report for conservation charity WWF said. Some of them become invasive in new sites, breeding prolifically by "escaping" the predators or diseases which would normally keep their numbers under control, competing with local species, disrupting food chains or damaging habitats.
The report estimated that in the last five years, invasive species have cost marine and coastal activities including fisheries, aquaculture, industrial infrastructure and harbours some £31 billion worldwide.
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[Read more stories about:
climate impacts, ecosystem interrelationships, invasive species]
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'Doc Michael says:
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It's like these ships are taking a giant crap on us!
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