Naturwissenschaften

, Volume 87, Issue 4, pp 184–187

Methane Ice Worms: Hesiocaeca methanicola Colonizing Fossil Fuel Reserves

  • C. R. Fisher
  • I. R. MacDonald
  • R. Sassen
  • C. M. Young
  • S. A. Macko
  • S. Hourdez
  • R. S. Carney
  • S. Joye
  • E. McMullin
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DOI: 10.1007/s001140050700

Cite this article as:
Fisher, C., MacDonald, I., Sassen, R. et al. Naturwissenschaften (2000) 87: 184. doi:10.1007/s001140050700

Abstract

 During a research cruise in July 1997 in the Gulf of Mexico we discovered a gas hydrate approximately 1 m thick and over 2 m in diameter which had recently breached the sea floor at a depth of 540 m. The hydrate surface visible from the submarine was considerably greater than that of any other reported hydrate. Two distinct color bands of hydrate were present in the same mound, and the entire exposed surface of the hydrate was infested (2500 individuals/m2) with 2 to 4 cm-long worms, since described as a new species, Hesiocaecamethanicola, in the polychaete family Hesionidae (Desbruyères and Toulmond 1998). H.methanicola tissue stable isotope values are consistent with a chemoautotrophic food source. No evidence of chemoautotrophic symbionts was detected, but geochemical data support the presence of abundant free living bacteria on the hydrate. The activities of the polychaetes, grazing on the hydrate bacteria and supplying oxygen to their habitats, appears to contribute to the dissolution of hydrates in surface sediments.

Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • C. R. Fisher
    • 1
  • I. R. MacDonald
    • 2
  • R. Sassen
    • 2
  • C. M. Young
    • 3
  • S. A. Macko
    • 4
  • S. Hourdez
    • 1
  • R. S. Carney
    • 5
  • S. Joye
    • 6
  • E. McMullin
    • 1
  1. 1.Department of Biology, Pennsylvania State University, University Park, PA 16802, USAUS
  2. 2.Geochemical and Environmental Research Group, Texas A&M University, College Station, TX 77845, USAUS
  3. 3.Harbor Branch Oceanographic Institution, 5600 U.S. 1 North, Fort Pierce, FL 35946, USAUS
  4. 4.Department of Environmental Sciences, University of Virginia, Charlottesville, VA 22903, USAUS
  5. 5.Coastal Ecology Institute, Louisiana State University, Baton Rouge, LA 70803, USAUS
  6. 6.Department of Marine Sciences, University of Georgia, Athens, GA 30605, USAUS

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