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Blake Ridge methane seeps: Characterization of a soft-sediment, chemosynthetically based ecosystem

Publication ,  Journal Article
Van Dover, CL; Aharon, P; Bernhard, JM; Caylor, E; Doerries, M; Flickinger, W; Gilhooly, W; Goffredi, SK; Knick, KE; Macko, SA; Rapoport, S ...
Published in: Deep-Sea Research Part I: Oceanographic Research Papers
January 1, 2003

Observations from the first submersible reconnaissance of the Blake Ridge Diapir provide the geological and ecological contexts for chemosynthetic communities established in close association with methane seeps. The seeps mark the loci of focused venting of methane from the gas hydrate reservoir, and, in one location (Hole 996D of the Ocean Drilling Program), methane emitted at the seafloor was observed forming gas hydrate on the underside of a carbonate overhang. Megafaunal elements of a chemosynthetically based community mapped onto dive tracks provide a preliminary overview of faunal distributions and habitat heterogeneity. Dense mussel beds were prominent and covered 20 x 20 m areas. The nearly non-overlapping distributions of mussels and clams indicate that there may be local (meter-scale) variations in fluid flux and chemistry within the seep site. Preliminary evidence suggests that the mussels are host to two symbiont types (sulfide-oxidizing thiotrophs and methanotrophs), while the clams derive their nutrition only from thiotrophic bacteria. Invertebrate biomass is dominated by mussels (Bathymodiolus heckerae) that reach lengths of up to 364 mm and, to a lesser extent, by small (22 mm length) vesicomyid clams (Vesicomya cf. venusta). Taking into account biomass distributions among taxa, symbiont characteristics of the bivalves, and stable-isotope analyses, the relative importance of methanotrophic vs thiotrophic bacteria in the overall nutrition of the invertebrate assemblage is on the order of 60% vs 40% (3:2). © 2003 Elsevier Science Ltd. All rights reserved.

Duke Scholars

Published In

Deep-Sea Research Part I: Oceanographic Research Papers

DOI

ISSN

0967-0637

Publication Date

January 1, 2003

Volume

50

Issue

2

Start / End Page

281 / 300

Related Subject Headings

  • Oceanography
  • 3708 Oceanography
  • 0405 Oceanography
  • 0403 Geology
  • 0402 Geochemistry
 

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Van Dover, C. L., Aharon, P., Bernhard, J. M., Caylor, E., Doerries, M., Flickinger, W., … Vrijenhoek, R. (2003). Blake Ridge methane seeps: Characterization of a soft-sediment, chemosynthetically based ecosystem. Deep-Sea Research Part I: Oceanographic Research Papers, 50(2), 281–300. https://doi.org/10.1016/S0967-0637(02)00162-0
Van Dover, C. L., P. Aharon, J. M. Bernhard, E. Caylor, M. Doerries, W. Flickinger, W. Gilhooly, et al. “Blake Ridge methane seeps: Characterization of a soft-sediment, chemosynthetically based ecosystem.” Deep-Sea Research Part I: Oceanographic Research Papers 50, no. 2 (January 1, 2003): 281–300. https://doi.org/10.1016/S0967-0637(02)00162-0.
Van Dover CL, Aharon P, Bernhard JM, Caylor E, Doerries M, Flickinger W, et al. Blake Ridge methane seeps: Characterization of a soft-sediment, chemosynthetically based ecosystem. Deep-Sea Research Part I: Oceanographic Research Papers. 2003 Jan 1;50(2):281–300.
Van Dover, C. L., et al. “Blake Ridge methane seeps: Characterization of a soft-sediment, chemosynthetically based ecosystem.” Deep-Sea Research Part I: Oceanographic Research Papers, vol. 50, no. 2, Jan. 2003, pp. 281–300. Scopus, doi:10.1016/S0967-0637(02)00162-0.
Van Dover CL, Aharon P, Bernhard JM, Caylor E, Doerries M, Flickinger W, Gilhooly W, Goffredi SK, Knick KE, Macko SA, Rapoport S, Raulfs EC, Ruppel C, Salerno JL, Seitz RD, Sen Gupta BK, Shank T, Turnipseed M, Vrijenhoek R. Blake Ridge methane seeps: Characterization of a soft-sediment, chemosynthetically based ecosystem. Deep-Sea Research Part I: Oceanographic Research Papers. 2003 Jan 1;50(2):281–300.
Journal cover image

Published In

Deep-Sea Research Part I: Oceanographic Research Papers

DOI

ISSN

0967-0637

Publication Date

January 1, 2003

Volume

50

Issue

2

Start / End Page

281 / 300

Related Subject Headings

  • Oceanography
  • 3708 Oceanography
  • 0405 Oceanography
  • 0403 Geology
  • 0402 Geochemistry