(Table 3) Stable isotope composition of sof t tissues of specimens from the Sea of Okhotsk ...

• Main Authors: Sahling, Heiko, Galkin, Sergey V, Salyuk, Anatoly, Greinert, Jens, Foerstel, Hilmar, Piepenburg, Dieter, Suess, Erwin
• Format: Dataset
• Language: English
• Published: PANGAEA 2003
• Subjects: Event label; Taxon/taxa; Species; Area/locality; Material; δ13C, organic carbon; δ15N, gas; Trawl net; MultiCorer; Dredge; Mass spectrometry; GE99/KOMEX_VI; LV28; Marshal Gelovany; Akademik M.A. Lavrentyev; Kurile-Okhotsk Sea Marine Experiment KOMEX; okhotsk sea; Sakhalin
• Online Access: https://dx.doi.org/10.1594/pangaea.769751; https://doi.pangaea.de/10.1594/PANGAEA.769751

We discovered and investigated several cold-seep sites in four depth zones of the Sea of Okhotsk off Northeast Sakhalin: outer shelf (160–250 m), upper slope (250–450 m), intermediate slope (450–800 m), and Derugin Basin (1450–1600 m). Active seepage of free methane or methane-rich fluids was detected in each zone. However, seabed photography and sampling revealed that the number of chemoautotrophic species decreases dramatically with decreasing water depth. At greatest depths in the Derugin Basin, the seeps were inhabited by bacterial mats and bivalves of the families Vesicomyidae (Calyptogena aff. pacifica, C. rectimargo, Archivesica sp.), Solemyidae (Acharax sp.) and Thyasiridae (Conchocele bisecta). In addition, pogonophoran tubeworms of the family Sclerolinidae were found in barite edifices. At the shallowest sites, on the shelf at 160 m, the seeps lack chemoautotrophic macrofauna; their locations were indicated only by the patchy occurrence of bacterial mats.Typical seep-endemic metazoans with ... : Supplement to: Sahling, Heiko; Galkin, Sergey V; Salyuk, Anatoly; Greinert, Jens; Foerstel, Hilmar; Piepenburg, Dieter; Suess, Erwin (2003): Depth-related structure and ecological significance of cold-seep communities - A case study from the Sea of Okhotsk. Deep Sea Research Part I: Oceanographic Research Papers, 50(12), 1391-1409 ...