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Scientists locate apparent hydrothermal vents off Antarctica
Date:3/3/2010

black smoker vents they had come for. In a pending paper, Sohn now says he has narrowed down the search to a 400-kilometer-square area where he expects to find seven new vents, including at least one black smoker.

The search for vents off Antarctica may be equally unpredictable, but the map produced by the Lamont scientists should greatly improve the odds of success, said Robert Newton, a Lamont oceanographer and study co-author. "You don't have to land right on top of a vent to know it's there," he said. "You get a rich mineral soup coming out of these smokersmethane, iron, manganese, sulphur and many other minerals. Once you get within a few tens of kilometers, you can detect these other tracers."

Since the discovery of the first hydrothermal vents in the late 1970s, scientists have searched for far-flung sites, in the hunt for new species and adaptive patterns that can shed light on how species evolved in different spots. Cindy Van Dover, a deep sea biologist and director of the Duke University Marine Laboratory, says she expects that new species will be found on the Pacific Antarctic Ridge, and that this region may hold important clues about how creatures vary between the Indian and Pacific Oceans, on either end.

"These vents are living laboratories," said Van Dover, who was not involved in the study. "When we went to the Indian Ocean, we discovered the scaly-foot gastropod, a deep-sea snail whose foot is covered in armor made of iron sulfides. The military may be interested in studying the snail to develop a better armor. The adaptations found in these animals may have many other applications."


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Contact: Kim Martineau
kmartine@ldeo.columbia.edu
845-365-8708
The Earth Institute at Columbia University
Source:Eurekalert  

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