Article Synopsis
- The Lost City hydrothermal field is a unique underwater ecosystem where geological, chemical, and biological processes work closely together.
- Reactions between seawater and upper mantle rocks create methane- and hydrogen-rich fluids at temperatures from below 40°C to 90°C, with notable carbonate chimneys rising up to 60 meters.
- While it has a low diversity of microorganisms related to methane-cycling Archaea, the macrofauna diversity is comparable to that of black smoker vent sites, though it lacks the high biomass of organisms usually found in volcanically driven systems.
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Article Abstract
The serpentinite-hosted Lost City hydrothermal field is a remarkable submarine ecosystem in which geological, chemical, and biological processes are intimately interlinked. Reactions between seawater and upper mantle peridotite produce methane- and hydrogen-rich fluids, with temperatures ranging from <40 degrees to 90 degrees C at pH 9 to 11, and carbonate chimneys 30 to 60 meters tall. A low diversity of microorganisms related to methane-cycling Archaea thrive in the warm porous interiors of the edifices. Macrofaunal communities show a degree of species diversity at least as high as that of black smoker vent sites along the Mid-Atlantic Ridge, but they lack the high biomasses of chemosynthetic organisms that are typical of volcanically driven systems.
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| http://dx.doi.org/10.1126/science.1102556 | DOI Listing |
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