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Heiko Sahling, Peter Linke, Nikolaus von Mirbach, Erwin Suess, Gyongyver Levai, Rich Lutz
GEOMAR, Research Center for Marine Geosciences
Dept. of Marine Environmental Geology
Wischhofstr. 1-3, Kiel, 24148, Germany
Benthic communities dominated by Calyptogena sp., Solemya sp. and Pogonophorans are observed and sampled in the eastern Aleutian trench.
Stable carbon isotopic composition of soft tissue indicate a nutrition based on sulphide oxidation for the bivalves, and a mixed biogenic methane or sulphide oxidation between species of Pogonophora. Dense colonies of Actiniaria attached to Calyptogena-shells rely on particles produced chemosynthetically. Aggregation of suspension feeding Crinoids could be observed around areas with active seepage indicating enhanced particle supply.
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