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dc.contributor.authorPeketi, A.
dc.contributor.authorMazumdar, A.
dc.contributor.authorSawant, B.
dc.contributor.authorManaskanya, A.
dc.contributor.authorZatale, Anjali
dc.date.accessioned2022-04-01
dc.date.accessioned2022-06-20T10:44:06Z
dc.date.available2022-01-30
dc.date.available2022-06-20T10:44:06Z
dc.date.issued2022
dc.identifier.citationMarine and Petroleum Geology, vol.138; 2022; Article no: 105542
dc.identifier.issn0264-8172
dc.identifier.otherhttps://www.sciencedirect.com/science/article/pii/S0264817222000204
dc.identifier.urihttps://doi.org/10.1016/J.MARPETGEO.2022.105542
dc.identifier.urihttps://drs.nio.org/drs/handle/2264/8828
dc.description4.348
dc.description.abstractActive cold seep sites associated with shallow gas hydrates were recently reported from Krishna-Godavari (K-G) basin, off east coast of India. Benthic fauna including chemosymbiotic bivalves (genera Bathymodiolus, Acharax, Conchocele), polychaetes (genus Sclerolinum), and heterotrophs (gastropods: Provannidae family; squat lobster: Munidopsidae/Galatheidae; Goose barnacle: genus Neolepas; Brittle star: genus Amphiodia) were sampled from the cold seep locations. Here, we present the first ?13C and ?15N data sets of the soft tissues extracted from the organisms along with the sediment pore fluid composition. The isotope ratios of the soft tissues provide a glimpse of the potential food sources for the cold seep organisms and the trophic structure of the ecosystem. The ?13C values suggest the dependence of the Bathymodiolus on methanotrophic symbionts, whereas Acharax, Conchocele, and Sclerolinum show the tell-tale signature of the thiotrophic pathways. In contrast, the heterotrophic benthic fauna shows a wide range of ?13C values, a signature of a variety of carbon sources. The ?15N values of the studied organisms also show a broad range (-1 to +9 �) indicating variable food sources as well as variable nitrogen assimilation pathways followed by various symbionts.
dc.languageen
dc.publisherElsevier
dc.relation.isreferencedbySCI
dc.rightsOnly the author version of the copright reserved papers uploaded. Contact drs@nio.org for any complaints regarding copyright violations
dc.titleBiogeochemistry and trophic structure of a cold seep ecosystem, offshore Krishna-Godavari basin (east coast of India)
dc.typeJournal Article
dc.affiliation.authorCSIR-National Institute of Oceanography, Dona Paula, Goa, India


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