Bacterial dominance in subseafloor sediments characterized by methane hydrates

Briggs, Brandon R.; Inagaki, Fumio; Morono, Yuki; Futagami, Taiki; Huguet, Carme; Rosell‐Melé, Antoni; Lorenson, Thomas D.; Colwell, Frederick S.

doi:10.1111/j.1574-6941.2012.01311.x

Cited by 42 publications

(30 citation statements)

References 60 publications

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“…(Blazejak and Schippers, 2010;Fry et al, 2008;Inagaki et al, 2006;Orcutt et al, 2011;Webster et al, 2004;Webster et al, 2007). JS1 often co-occurs with Chloroflexi in anoxic sediment zones (Briggs et al, 2012;Orcutt et al, 2011), which was also observed in this study. But the ecological niche for JS1-affiliated bacteria is still controversial.…”

Section: Bacterial Diversitysupporting

confidence: 73%

“…The finding that organic matter influences the bacterial community structure has been observed in the Andaman Sea, the North Sea and the Arctic Mid-Ocean Ridge (Briggs et al, 2012;Jorgensen et al, 2012;Sapp et al, 2010). In this study, both TOC and TON were influencing factors for the bacterial community structure.…”

Section: Correlation Between Bacterial Community Composition and Envimentioning

confidence: 65%

“…Later, Inagaki et al (2006) also found that JS1, together with Planctomycetes and Chloroflexi, dominated at methane hydrate bearing sites in the Peru Margin and the Cascadia Margin. However, along the gas hydrate occurrence zone (GHOZ) in the Andaman Sea, more than 50% of bacterial clones are identified as members of Firmicutes (Briggs et al, 2012). The phylum Chloroflexi distributes diversely and widely.…”

Section: Bacterial Diversitymentioning

confidence: 99%

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Bacterial diversity in sediments of core MD05-2902 from the Xisha Trough, the South China Sea

Wang

2014

Acta Oceanol. Sin.

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A sediment core MD05-2902 was collected from the deep-sea basin of the Xisha Trough. The vertical distribution and diversity of bacteria in the core was investigated through ten sub-sampling with an interval of 1 m using bacterial 16S rRNA gene as a phylogenetic bio-marker. Eighteen phylogenetic groups were identified from 16S rRNA gene clone libraries. The dominant bacterial groups were JS1, Planctomycetes and Chloroflexi, which accounted for 30.6%, 16.6%, and 15.6% of bacterial clones in the libraries, respectively. In order to reveal the relationship between biotic and abiotic data, a nonmetric multidimensional scaling analysis was performed. The result revealed that the δ 15 N, δ 13 C, total organic carbon and total organic nitrogen possibly influenced the bacterial community structure. This study expanded our knowledge of the biogeochemical cycling in the Xisha Trough sediment.

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Section: Bacterial Diversitysupporting

confidence: 73%

Section: Correlation Between Bacterial Community Composition and Envimentioning

confidence: 65%

Section: Bacterial Diversitymentioning

confidence: 99%

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Bacterial diversity in sediments of core MD05-2902 from the Xisha Trough, the South China Sea

Wang

2014

Acta Oceanol. Sin.

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“…Methane gas hydrates are widely found in continental margin sediments where methane is abundant, temperature is low, and pressure is high (Kvenvolden, 1993;Buffett, 2000;Tréhu et al, 2006). Hydrates are not uniformly distributed within sediments and their morphology depends on grain and pore size.…”

Section: Introductionmentioning

confidence: 99%

Testing short-range migration of microbial methane as a hydrate formation mechanism: Results from Andaman Sea and Kumano Basin drill sites and global implications

Malinverno

Goldberg

2015

Earth and Planetary Science Letters

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Methane gas hydrates in marine sediments often concentrate in coarse-grained layers surrounded by finegrained marine muds that are hydrate-free. Methane in these hydrate deposits is typically microbial, and must have migrated from its source as the coarse-grained sediments contain little or no organic matter. In "long-range" migration, fluid flow through permeable layers transports methane from deeper sources into the gas hydrate stability zone (GHSZ). In "short-range" migration, microbial methane is generated within the GHSZ in fine-grained sediments, where small pore sizes inhibit hydrate formation. Dissolved methane can then diffuse into adjacent sand layers, where pore size does not restrict hydrate formation and hydrates can accumulate. Short-range migration has been used to explain hydrate accumulations in sand layers observed in drill sites on the northern Cascadia margin and in the Gulf of Mexico. Here we test the feasibility of short-range migration in two additional locations, where gas hydrates have been found in coarse-grained volcanic ash layers (Site NGHP-01-17, Andaman Sea, Indian Ocean) and turbidite sand beds (Site IODP-C0002, Kumano forearc basin, Nankai Trough, western Pacific). We apply reactiontransport modeling to calculate dissolved methane concentration and gas hydrate amounts resulting from microbial methane generated within the GHSZ. Model results show that short-range migration of microbial methane can explain the overall amounts of methane hydrate observed at the two sites. Short-range migration has been shown to be feasible in diverse margin environments and is likely to be a widespread methane transport mechanism in gas hydrate systems. It only requires a small amount of organic carbon and sediment sequences consisting of thin coarse-grained layers that can concentrate microbial methane generated within thick fine-grained sediment beds; these conditions are common along continental margins around the globe.

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“…The limited number of microbiological studies focused on sediment of the Juan de Fuca Ridge have typically not incorporated phylogenetic marker-based surveys of community diversity such as small subunit ribosomal RNA (SSU rRNA) gene sequencing (e.g., Cragg et al, 2000;Mather and Parkes, 2000;Engelen et al, 2008); only studies focused on Cascadia margin methane hydrate-bearing sediment have incorporated such an approach (e.g., Bidle et al, 1999;Marchesi et al, 2001;Knittel et al, 2003;Inagaki et al, 2006;Nunoura et al, 2008;Briggs et al, 2012). Descriptions of the phylogenetic and metabolic composition of microbial communities from other Juan de Fuca Ridge sediment environments are important for comprehensively investigating patterns in microbial distribution and community evolution with respect to gradients in the physical and chemical properties of the system.…”

Section: Introductionmentioning

confidence: 99%

Data report: microbial diversity in sediment near Grizzly Bare Seamount in Holes U1363B and U1363G

Jungbluth¹,

Johnson²,

Cowen³

et al. 2013

Proceedings of the IODP

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Microorganisms inhabiting sediment in close proximity to recharging basement outcrops are of interest because of the enhanced advective fluid flow in these locations, which is expected to exert unique selective pressures on the resident microbial communities. Here, Integrated Ocean Drilling Program (IODP) boreholes were used to access sediment microbial communities near Grizzly Bare recharge seamount on the Juan de Fuca Ridge eastern flank. The two locations examined in this study, Holes U1363G and U1363B, are 50 and 177 m away from the center of the outcrop, respectively. In general, small subunit ribosomal RNA gene clones from all three domains of life were detected; these groups were predominantly related to microorganisms known to reside in marine sediment. A large fraction of environmental gene clones recovered from Hole U1363B and U1363G sediment were related to uncultivated, candidate phyla of Bacteria such as BHI80-139, BRC1, JS1, OPB41, and TA06. Hole U1363B and U1363G sediment clone libraries were generally dominated by the domain Bacteria and particularly the phylum Chloroflexi, which comprised approximately one-quarter of the total gene clones identified. However, borehole sediment also contained several archaeal lineages that were phylogenetically affiliated with the Miscellanenous Crenarchaeotal Group. Eukaryotic fungi were only detected within the interstitial water sample from Hole U1363B. Finally, a minor portion of clones recovered from sediment in this study were also recovered from basement fluid samples previously characterized from Baby Bare discharge seamount and Ocean Drilling Program and IODP borehole Circulation Obviation Retrofit Kit Observatories (CORKs) in Holes 1026B and U1301A, which are ~50 km to the north-northeast.

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Bacterial dominance in subseafloor sediments characterized by methane hydrates

Cited by 42 publications

References 60 publications

Bacterial diversity in sediments of core MD05-2902 from the Xisha Trough, the South China Sea

Bacterial diversity in sediments of core MD05-2902 from the Xisha Trough, the South China Sea

Testing short-range migration of microbial methane as a hydrate formation mechanism: Results from Andaman Sea and Kumano Basin drill sites and global implications

Data report: microbial diversity in sediment near Grizzly Bare Seamount in Holes U1363B and U1363G

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