Biological Communities at the Florida Escarpment Resemble Hydrothermal Vent Taxa

Paull, C. K.; Hecker, Barbara; Commeau, R.F.; Freeman-Lynde, R. P.; Neumann, Christian; Corso, William; Golubic, S.; Hook, James E.; Sikes, Elisabeth L.; Curray, Joseph R.

doi:10.1126/science.226.4677.965

Cited by 518 publications

(248 citation statements)

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“…The first cold seep ecosystem was discovered on the Florida Escarpment in the Gulf of Mexico (PAULL et al 1984). Since then, seeps have been discovered in other parts of the world's oceans.…”

Section: Introductionmentioning

confidence: 99%

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Vertical distribution of archaeal communities in cold seep sediments from the jiulong methane reef area in the south China sea

Cui¹,

Su²,

Fang³

et al. 2016

Biosci. J.

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Jiulong methane reef, a large cold seep area on the continental slope of the South China Sea (SCS), was characterized by chemosynthetic fauna, bacterial mats, methane-derived carbonate structures, and a shallow depth of sulfate-methane transition zone (SMTZ) in gravity cores. To characterize the microbial diversity and variation in correlation to methane venting in the cold seep area, the archaeal community in sediments of the gravity Core CL11 was analyzed, using the Illumina MiSeq sequencing system. A total of 96,917 valid sequences were obtained and classified into 275 OTUs. Taxonomic analysis showed that all the archaeal sequences belonged to the phyla of Crenarchaeota (69.41%) and Eurarchaeota (25.26%). Vertical distribution of the archaeal communities showed that the Marine Benthic Group B (MBG-B) was the predominant group (58.92%) in the topmost sediment of the core, while percentages of the South African Gold Mine Euryarchaeotal Group (SAGMEG) sequences increased with depth. Our findings indicate that the archaeal community in the cold seep of Jiulong Methane Reef is unique and provides us new insights into the archaeal community composition of the cold seep area.

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Section: Introductionmentioning

confidence: 99%

“…The sediment porosity was determined as Ma et al (2013) described. Total organic carbon (TOC) content was determined according to the Jiao et al (2015) protocol using a Multi N/C 2100 Analyzer.…”

Section: Geochemical and Sedimentary Analysesmentioning

confidence: 99%

Vertical distribution of archaeal communities in cold seep sediments from the jiulong methane reef area in the south China sea

Cui¹,

Su²,

Fang³

et al. 2016

Biosci. J.

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“…While hydrothermal vents were first discovered in 1977 along the Galapagos Rift, a spur of the East Pacific Rise (Corliss et al, 1979), the first finding of cold seeps occurred in the Gulf of Mexico (Paull et al, 1984). The term cold seep soon became popular to identify seafloor sites where hydrocarbon-rich fluids are released, and have temperatures comparable with that of the surrounding seawater.…”

Section: Introductionmentioning

confidence: 99%

Authigenic minerals from the Paola Ridge (southern Tyrrhenian Sea): Evidences of episodic methane seepage

Franchi

Rovere

Gamberi

et al. 2017

Marine and Petroleum Geology

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a b s t r a c tPaola Ridge, along the NW Calabrian margin (southern Tyrrhenian Sea), is one of the few reported deep sea sites of precipitation of authigenic carbonates in the Tyrrhenian Sea. Here, the changing composition of the seeping fluids and the dynamic nature of the seepage induced the precipitation of pyrite, siderite and other carbonate phases. The occurrence of this array of authigenic precipitates is thought to be related to fluctuation of the sulfate-methane transition zone (SMTZ).Concretions of authigenic minerals formed in the near sub-bottom sediments of the Paola Ridge were investigated for their geochemical and isotopic composition. These concretions were collected in an area characterized by the presence of two alleged mud volcanoes and three mud diapirs. The mud diapirs are dotted by pockmarks and dissected by normal faults, and are known for having been a site of fluid seepage for at least the past 40 kyrs. Present-day venting activity occurs alongside the two alleged mud volcanoes and is dominated by CO 2 -rich discharging fluids. This discover led us to question the hypothesis of the mud volcanoes and investigate the origin of the fluids in each different domed structure of the study area.In this study, we used stable isotopes (carbon and oxygen) of carbonates coupled with rare earth element (REE) composition of different carbonate and non-carbonate phases for tracing fluid composition and early diagenesis of authigenic precipitates. The analyses on authigenic precipitates were coupled with chemical investigation of venting gas and sea-water.Authigenic calcite/aragonite concretions, from surficial sediments on diapiric structures, have depleted values. The siderite REE pattern shows consistent LREE (light REE) fractionation, MREE (medium REE) enrichment and positive Gd and La anomalies. As shown by the REE distribution, the 13 C-depleted composition and their association with chemosymbiotic fauna, calcite/aragonite precipitated at time of moderate to high methane flux close to the seafloor, under the influence of bottom seawater. Authigenic siderite, on the other hand, formed in the subseafloor, during periods of lower gas discharges under prolonged anoxic conditions within sediments in equilibrium with 13 C-rich dissolved inorganic carbon (DIC) and 18 O-rich water, likely related to methanogenesis and intermittent venting of deep-sourced CO 2 .

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“…Due to their isolated occurrence in deep-water sediments and the large bivalves preserved in them, they were considered to have been transported from shallow water (Ricci Lucchi and Veggiani, 1967). This view changed after the first discovery of faunal communities at methane seeps in the deep Gulf of Mexico with similarly large bivalves (Paull et al, 1984) and the recognition that methane seep carbonates can be identified based on their distinctive, light carbon isotope signature (Hovland et al, 1987). The 'Calcari a Lucina' deposits throughout Italy are now considered as ancient deep-water methane seep deposits Conti et al, 1993;Terzi, 1993;Aharon and Sen Gupta, 1994;Berti et al, 1994;Ricci Lucchi and Vai, 1994;Taviani, 1994;Terzi et al, 1994;Peckmann et al, 1999;Clari et al, 2004b;Conti et al, 2004.…”

Section: Introductionmentioning

confidence: 99%

Chemosymbiotic bivalves from Miocene methane-seep carbonates in Italy

Kiel¹,

Taviani

2017

J. Paleontol.

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Abstract.-Eleven species of chemosymbiotic bivalves are reported from middle to late Miocene methane seep deposits ('Calcari a Lucina') in the Italian Apennines, including seven new species and one new genus. The new species are Bathymodiolus (s.l.) moroniae and B. (s.l.) miomediterraneus among the Bathymodiolinae and Archivesica aharoni, A. apenninica, A. strigarum, and 'Pliocardia' italica among the Vesicomyidae; specimens from the middle Miocene of Deruta are reported as Archivesica aff. aharoni. Samiolus iohannesbaptistae new genus new species is introduced for an unusual mytilid with a commarginally ribbed surface, which might be the first non-bathymodiolin mytilid obligate to the seep environment. The two large lucinid species from which these deposits derived their informal name 'Calcari a Lucina' are identified as Meganodontia hoernea (Des Moulins, 1868) and Lucinoma perusina (Sacco, 1901). With Chanellaxinus sp., we report the first thyasirid from a Neogene deep-water seep deposit in Italy and the first fossil occurrence of this genus.

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Biological Communities at the Florida Escarpment Resemble Hydrothermal Vent Taxa

Cited by 518 publications

References 2 publications

Vertical distribution of archaeal communities in cold seep sediments from the jiulong methane reef area in the south China sea

Vertical distribution of archaeal communities in cold seep sediments from the jiulong methane reef area in the south China sea

Authigenic minerals from the Paola Ridge (southern Tyrrhenian Sea): Evidences of episodic methane seepage

Chemosymbiotic bivalves from Miocene methane-seep carbonates in Italy

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