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The trash that ends up in the ocean has become a vehicle for the transportation of exotic marine life into new ports. This is threatening global biodiversity, particularly in the Southern Ocean.

David Barnes of the British Antarctic Survey (BAS) made a 10-year study of human litter, mostly plastic, that washed ashore on 30 remotes islands, from the Arctic to the Antarctic. His team found that litter has almost doubled the spread of alien species in the subtropics and more than tripled it at high latitudes.
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Cathy Zollo writes in the Naples (FL) Daily News that commercial fishermen along the Southwest Florida coast are reporting a massive dead zone that contains no marine life in an area of the Gulf of Mexico that has traditionally been a rich fishing ground. They want scientists and government agencies to find out what?s causing it, but scientists are baffled.

?It?s killed a lot of the bottom because recently a lot of little bottom plants are coming to the surface dead and rotten out in the Gulf,? says Tim Daniels, a Marathon Key fish-spotting pilot who has been flying over the Gulf for more than 20 years.
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