Carbon and nitrogen isotopic composition of the fauna from the Broken Spur hydrothermal vent field

The carbon and nitrogen isotopic composition of 18 faunistic groups collected during the 39th cruise of the R.V. "Akademik Mstislav Keldysh" in September 1996 at the Broken Spur vent field, MAR, was studied. The trophic structure of the Broken Spur vent community is considered. All age sta...

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Bibliographic Details
Published in:Marine biology 2000-02, Vol.136 (1), p.11-17
Main Authors: Vereshchaka, AL, Vinogradov, G M, Lein, A Y, Dalton, S, Dehairs, F
Format: Article
Language:English
Subjects:
Atlantic Ocean
Benthic fauna
Carbon
Chorocaris chacei
Isotopes
Marine
Marine biology
Nitrogen
Rimicaris exoculata
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Summary:The carbon and nitrogen isotopic composition of 18 faunistic groups collected during the 39th cruise of the R.V. "Akademik Mstislav Keldysh" in September 1996 at the Broken Spur vent field, MAR, was studied. The trophic structure of the Broken Spur vent community is considered. All age stages of the shrimp Rimicaris exoculata living 5 m below the main aggregations at black smokers show higher δ15N and more depleted δ13C values than the same stages inhabiting the black smokers themselves. The shrimps R. exoculata and Chorocaris chacei demonstrate ontogenetic changes in δ13C (the former also in δ15N), with smaller individuals showing higher δ15N and more depleted δ13C values than larger shrimps. Benthopelagic and benthic components of the vent community differ significantly in δ13C and δ15N, the benthic fauna being less dependent upon chemosynthetic production.
ISSN:0025-3162
1432-1793
DOI:10.1007/s002270050002