@article {Feng2013,
	title = {{A comparative study of authigenic carbonates from mussel and tubeworm environments: Implications for discriminating the effects of tubeworms}},
	journal = {Deep-Sea Research. Part I: Oceanographic Research Papers},
	volume = {75},
	year = {2013},
	pages = {110{\textendash}118},
	abstract = {The Gulf of Mexico hydrocarbon seeps are often populated by dense mussel beds and tubeworm aggregations, as well as exposed authigenic carbonate outcrops. Previous studies suggest the activity of mussels and tubeworms could influence the sediment geochemistry of their habitats, resulting in variations in the stable carbon isotopes of the associated carbonates. However, this conclusion was based on the analyses of samples from a single site. To better understand whether there are consistent differences in the geochemical environments of mussels and tubeworms, mineralogical and stable isotopic compositions of authigenic carbonates from mussel and tubeworm environments from four seep sites were analyzed. The studied sites span a depth range of 1200~m to 2800~m on the northern Gulf of Mexico continental slope. We found that carbonate samples from tubeworm environments were more prone to contain aragonite whereas carbonates from mussel environments were more likely to have calcite. This finding supports the hypothesis that vestimentiferans release sulfate across their roots into the pore waters of the surrounding sediments, a process that could generate a locally sulfate-enriched environment that favors the precipitation of aragonite instead of calcite. Moreover, the $δ$13C values of tubeworm carbonates are generally lighter than that of mussel carbonates from the same site, which is consistent with the fact that tubeworms are fueling extra subsurface methane oxidation through the release of sulfate into the sediment. Such a process, consequently, enriches the subsurface dissolved inorganic carbon pool with light carbon derived from the seeping hydrocarbons. Taken together, our data suggest that tubeworms could produce a carbon isotope shift that is sufficient to influence the sediment geochemistry of their immediate area, and that this impact is reflected in the associated authigenic carbonates.},
	keywords = {HOV Alvin (Human Occupied Vehicle), ROV Jason (Remotely Operated Vehicle)},
	issn = {0967-0637},
	doi = {10.1016/j.dsr.2013.02.002},
	url = {http://www.sciencedirect.com/science/article/pii/S0967063713000435},
	author = {Feng, D and Cordes, E E and Roberts, H H and Fisher, C R}
}
@article {Luther2012,
	title = {{Chemistry, Temperature, and Faunal Distributions at Diffuse-Flow Hydrothermal Vents Comparison of Two Geologically Distinct Ridge Systems}},
	journal = {Oceanography},
	volume = {25},
	number = {1},
	year = {2012},
	month = {mar},
	pages = {234{\textendash}245},
	abstract = {Diffuse-flow, low-temperature areas near hydrothermal vents support life via chemosynthesis: hydrogen sulfide (and other reduced chemical compounds) emanating from the subsurface is oxidized with bottom-water oxygen through bacterial mediation to fix carbon dioxide and produce biomass. This article reviews the in~situ diffuse-flow chemistry (mainly H2S and O2) and temperature data collected in 2006 and 2009 along the Eastern Lau Spreading Center (ELSC), and from 2004 to 2008 at 9{\textdegree}N along the East Pacific Rise (9 N EPR), predominantly around macrofauna that contain endosymbionts at these two hydrothermal vent regions. More than 48,000 and 20,000 distinct chemical and temperature data points were collected with a multi-analyte electrochemical analyzer in the diffuse-flow waters at 9 N EPR and the ELSC, respectively. Despite their different geological settings and different macrofauna (two different species of snails and mussels at the ELSC versus two different species of tubeworms and mussels at 9 N EPR), there are similarities in the temperature and chemistry data, as well as in the distributions of organisms. The pattern of water chemistry preferred by the provannid snails (Alviniconcha~spp., Ifremeria nautilei) and Bathymodiolus brevior at the ELSC is similar to the water chemistry pattern found for the siboglinid tubeworms (Tevnia jerichonana, Riftia pachyptila) and the Bathymodiolus thermophilus mussels at 9 N EPR. The eruptions at 9 N EPR in 2005 and 2006 resulted in increased H2S concentrations, increased H2S/T ratios, and an initial change in the dominant tubeworm species from Riftia pachyptila to Tevnia jerichonana after the eruption created new vent habitats. In 2005, two sites at 9 N EPR showed major increases in the H2S/T ratio from 2004, which suggested a probable eruption in this basalt-dominated system. At the ELSC, there was a decrease in the H2S/T ratio from northern to southern sites, which reflects the change in geological setting from basalt to andesite and the shallower water depths at the southern sites.},
	keywords = {HOV Alvin (Human Occupied Vehicle), ROV Jason (Remotely Operated Vehicle)},
	issn = {1042-8275},
	doi = {10.5670/oceanog.2012.22},
	author = {Luther, G W and Gartman, A and Yuecel, M and Madison, A S and Moore, T S and Nees, H A and Nuzzio, D B and Sen, A and Lutz, R A and Shank, T M and Fisher, C R}
}
@article {Lessard-Pilon2010,
	title = {{Community composition and temporal change at deep Gulf of Mexico cold seeps}},
	journal = {Deep-Sea Research. Part II: Topical Studies in Oceanography},
	volume = {57},
	number = {21-23},
	year = {2010},
	pages = {1891{\textendash}1903},
	abstract = {Specialized cold-seep communities have been known to exist in the Gulf of Mexico (GOM) since the mid-1980s, but only recently has extensive research been carried out on sites at depths {\textgreater}1000 m. This study uses a combination of imagery and analyses within a Geographic Information Systems (GIS) framework to examine the composition of mussel and tubeworm communities at depths between 2200 and 2800 m in the Gulf of Mexico, spatial relations among the fauna, and changes in these communities over time. Photomosaics at three discrete seep communities were obtained in 2006 and a video mosaic of another community was obtained in 1992. Each of these communities was re-imaged in 2007. In addition, quantitative physical collections were made within two of the photomosaic sites and used to confirm the identification of megafauna, quantify the occurrence of smaller and cryptic macrofauna, and allow first-order calculations of biomass within the sites. Substrate type had a significant effect on community composition. Significant associations were identified between live mussels with anemones, shrimp, and sea cucumbers, and between tubeworm aggregations and Munidopsis sp. crabs and encrusting fauna, indicating differences in the composition of megafauna associated with adjacent mussel and tubeworm aggregations. Little change was seen in the total area colonized by foundation fauna (tubeworms and mussels) between years at any site. However, significant changes occurred in the positions of mussels, even over periods of a single year, at all sites, and evidence for the establishment of new tubeworm aggregations between 1992 and 2007 was noted at one site. These photomosaics provide data suggesting that environmental conditions can change over small spatial and temporal scales and mussels move in response to these changes. The successional trends are examined and compared to the patterns that have been documented in shallow ({\textless}1000-m depth) Gulf of Mexico seep communities.},
	keywords = {HOV Alvin (Human Occupied Vehicle), ROV Jason (Remotely Operated Vehicle)},
	issn = {0967-0645},
	doi = {10.1016/j.dsr2.2010.05.012},
	url = {http://dx.doi.org/10.1016/j.dsr2.2010.05.012},
	author = {Lessard-Pilon, S and Porter, M D and Cordes, E E and MacDonald, I R and Fisher, C R}
}
@article {Cordes2008,
	title = {{Coral communities of the deep Gulf of Mexico}},
	journal = {Deep-Sea Research. Part I: Oceanographic Research Papers},
	volume = {55},
	number = {6},
	year = {2008},
	month = {jun},
	pages = {777{\textendash}787},
	issn = {0967-0637},
	doi = {10.1016/j.dsr.2008.03.005},
	author = {Cordes, E E and McGinley, M P and Podowski, E L and Becker, E L and Lessard-Pilon, S and Viada, S T and Fisher, C R}
}
@article {Fisher2007b,
	title = {{Cold Seeps and Associated Communities of the Gulf of Mexico}},
	journal = {Oceanography},
	volume = {20},
	number = {4},
	year = {2007},
	month = {dec},
	pages = {118{\textendash}129},
	issn = {1042-8275},
	doi = {10.5670/oceanog.2007.12},
	author = {Fisher, C R and Roberts, H and Cordes, E and Bernard, B}
}
@article {Pflugfelder2005,
	title = {{The color of the trophosome: elemental sulfur distribution in the endosymbionts of Riftia pachyptila (Vestimentifera; Siboglinidae)}},
	journal = {Marine Biology},
	volume = {146},
	number = {5},
	year = {2005},
	pages = {895{\textendash}901},
	keywords = {HOV Alvin (Human Occupied Vehicle)},
	issn = {0025-3162},
	doi = {10.1007/s00227-004-1500-x},
	url = {http://dx.doi.org/10.1007/s00227-004-1500-x},
	author = {Pflugfelder, B and Fisher, C R and Bright, M}
}
@article {Kicklighter2004,
	title = {{Chemical defense of hydrothermal vent and hydrocarbon seep organisms: a preliminary assessment using shallow-water consumers}},
	journal = {Marine Ecology Progress Series},
	volume = {275},
	year = {2004},
	pages = {11{\textendash}19},
	keywords = {HOV Alvin (Human Occupied Vehicle)},
	doi = {10.3354/meps275011},
	author = {Kicklighter, C E and Fisher, C R and Hay, M E}
}
@article {Govenar2004,
	title = {{Composition of a One-Year-Old Riftia pachyptila Community Following a Clearance Experiment: Insight to Succession Patterns at Deep-Sea Hydrothermal Vents}},
	journal = {Biological Bulletin},
	volume = {207},
	number = {3},
	year = {2004},
	pages = {177{\textendash}182},
	keywords = {HOV Alvin (Human Occupied Vehicle)},
	url = {http://www.jstor.org/stable/1543204},
	author = {Govenar, B and Freeman, M and Bergquist, D C and Johnson, G A and Fisher, C R}
}
@article {Scott1999,
	title = {{Carbon dioxide use by chemoautotrophic endosymbionts of hydrothermal vent vestimentiferans: affinities for carbon dioxide, absence of carboxysomes, and delta C-13 values}},
	journal = {Marine Biology},
	volume = {135},
	number = {1},
	year = {1999},
	month = {oct},
	pages = {25{\textendash}34},
	keywords = {HOV Alvin (Human Occupied Vehicle), ROV Jason (Remotely Operated Vehicle)},
	issn = {0025-3162},
	doi = {10.1007/s002270050597},
	author = {Scott, K M and Bright, M and Macko, S A and Fisher, C R}
}
@inbook {Nelson1995a,
	title = {{Chemoautotrophic and methanotrophic endosymbiotic bacteria at deep-sea vents and seeps}},
	booktitle = {Microbiology of Deep Sea Hydrothermal Vents},
	year = {1995},
	pages = {125{\textendash}167},
	publisher = {CRC Press},
	organization = {CRC Press},
	address = {Boca Raton, Fla.},
	isbn = {0-8493-8860-0},
	author = {Nelson, D C and Fisher, C R},
	editor = {Karl, D M}
}
@article {Fisher1993a,
	title = {{The co-occurrence of methanotrophic and chemoautotrophic sulfur-oxidizing symbionts in a deep-sea mussel}},
	journal = {Marine Ecology},
	volume = {14},
	number = {4},
	year = {1993},
	pages = {277{\textendash}289},
	issn = {0173-9565},
	doi = {10.1111/j.1439-0485.1993.tb00001.x},
	url = {http://dx.doi.org/10.1111/j.1439-0485.1993.tb00001.x},
	author = {Fisher, C R and Brooks, J M and Vodenichar, J S and Zande, J M and Childress, J J and Burke, R A}
}
@article {Fisher1990,
	title = {{Chemoautotrophic and methanotrophic symbioses in marine invertebrates}},
	journal = {Reviews in Aquatic Sciences},
	volume = {2},
	number = {3-4},
	year = {1990},
	pages = {399{\textendash}436},
	issn = {0891-4117},
	author = {Fisher, C R}
}
