DOI: 10.1111/gbi.12146
Scopus记录号: 2-s2.0-84944147439
论文题名: Crustal fluid and ash alteration impacts on the biosphere of Shikoku Basin sediments, Nankai Trough, Japan
作者: Torres M.E. ; Cox T. ; Hong W..-L. ; Mcmanus J. ; Sample J.C. ; Destrigneville C. ; Gan H.M. ; Gan H.Y. ; Moreau J.W.
刊名: Geobiology
ISSN: 1472-4677
EISSN: 1472-4669
出版年: 2015
卷: 13, 期: 6 起始页码: 562
结束页码: 580
语种: 英语
Scopus关键词: anoxic conditions
; ash
; bacterium
; biosphere
; carbon cycle
; concentration (composition)
; fluid
; iron
; metal
; methane
; microbial community
; oxidant
; sediment core
; sulfate
; Japan
; Nankai Trough
; Pacific Ocean
; Philippine Sea
; Shikoku
; Alteromonas
; Archaea
; Deltaproteobacteria
; Gammaproteobacteria
; unclassified Euryarchaeota
; archaeal DNA
; bacterial DNA
; RNA 16S
; archaeon
; bacterium
; biodiversity
; classification
; environment
; genetics
; isolation and purification
; microbiology
; Pacific Ocean
; polymerase chain reaction
; sediment
; Archaea
; Bacteria
; Biodiversity
; DNA, Archaeal
; DNA, Bacterial
; Environment
; Geologic Sediments
; Pacific Ocean
; Polymerase Chain Reaction
; RNA, Ribosomal, 16S
Scopus学科分类: Earth and Planetary Sciences: General Earth and Planetary Sciences
; Environmental Science: General Environmental Science
; Agricultural and Biological Sciences: Ecology, Evolution, Behavior and Systematic
英文摘要: We present data from sediment cores collected from IODP Site C0012 in the Shikoku Basin. Our site lies at the Nankai Trough, just prior to subduction of the 19 Ma Philippine Sea plate. Our data indicate that the sedimentary package is undergoing multiple routes of electron transport and that these differing pathways for oxidant supply generate a complex array of metabolic routes and microbial communities involved in carbon cycling. Numerical simulations matched to pore water data document that Ca2+ and Cl1- are largely supplied via diffusion from a high-salinity (44.5 psu) basement fluid, which supports the presence of halophile Archean communities within the deep sedimentary package that are not observed in shallow sediments. Sulfate supply from basement supports anaerobic oxidation of methane (AOM) at a rate of ~0.2 pmol cm-3 day-1 at ~400 mbsf. We also note the disappearance of δ-Proteobacteria at 434 mbsf, coincident with the maximum in methane concentration, and their reappearance at 463 mbsf, coinciding with the observed deeper increase in sulfate concentration toward the basement. We did not, however, find ANME representatives in any of the samples analyzed (from 340 to 463 mbsf). The lack of ANME may be due to an overshadowing effect from the more dominant archaeal phylotypes or may indicate involvement of unknown groups of archaea in AOM (i.e., unclassified Euryarchaeota). In addition to the supply of sulfate from a basement aquifer, the deep biosphere at this site is also influenced by an elevated supply of reactive iron (up to 143 μmol g-1) and manganese (up to 20 μmol g-1). The effect of these metal oxides on the sulfur cycle is inferred from an accompanying sulfur isotope fractionation much smaller than expected from traditional sulfate-reducing pathways. The detection of the manganese- and iron-reducer γ-Proteobacteria Alteromonas at 367 mbsf is consistent with these geochemical inferences. © 2015 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/85125
Appears in Collections: 影响、适应和脆弱性
There are no files associated with this item.
作者单位: CEOAS, Oregon State University, Corvallis, OR, United States; School of Earth Sciences, University of Melbourne, Parkville, VIC, Australia; Department of Geosciences, University of Akron, Akron, OH, United States; School of Earth Sciences and Environmental Sustainability, Northern Arizona University, Flagstaff, AZ, United States; Université de Toulouse, UPS-OMP-LMTG, Toulouse, France; School of Science, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, Petaling Jaya, Selangor, Malaysia
Recommended Citation:
Torres M.E.,Cox T.,Hong W..-L.,et al. Crustal fluid and ash alteration impacts on the biosphere of Shikoku Basin sediments, Nankai Trough, Japan[J]. Geobiology,2015-01-01,13(6)