138 0

Microbial Community Structure Associated with Biogeochemical Processes in the Sulfate-Methane Transition Zone (SMTZ) of Gas-hydrate-bearing Sediment of the Ulleung Basin, East Sea

Title
Microbial Community Structure Associated with Biogeochemical Processes in the Sulfate-Methane Transition Zone (SMTZ) of Gas-hydrate-bearing Sediment of the Ulleung Basin, East Sea
Author
김성한
Keywords
AOM; gas hydrate; microbial community structure; Ulleung Basin; SMTZ
Issue Date
2017-02
Publisher
TAYLOR & FRANCIS INC
Citation
GEOMICROBIOLOGY JOURNAL, v. 34, No. 3, Page. 207-219
Abstract
We investigated the biogeochemical constituents, microbial communities and functional genes (mcr and dsr) associated with anaerobic methane oxidation and sulfate reduction, and metabolic activities by sulfate reduction in the sulfate-methane transition zone (SMTZ) of gas-hydrate-bearing sediment of the Ulleung Basin in the East Sea. Maxima in the sulfate reduction rate (12.6nmolcm(-3) d(-1)), CO concentration (83M), and gene abundances of dsrA (9.1 x 10(6) copiescm(-3)) and mcrA (11.6 x 10(6) copiescm(-3)) occurred in the SMTZ. The peaks of CO consistently found in the SMTZ suggested that CO is an intermediate metabolic product related to methane oxidation. Candidate division JS1, the predominant bacterial group that comprised 59.0-63.7% of the 16S rRNA gene sequences, was recognized as an important organic carbon oxidizer. Both Marine Benthic Group D (MBGD) and Marine Benthic Group B (MBGB), which constituted 40.8-52.9 and 10.3-43.9% of the 16S rRNA gene sequences, respectively, were the dominant archaeal groups. Analysis of functional gene diversity revealed that anaerobic methanotroph-1-related phylotypes appeared to be the major CH4 oxidizer, whereas Firmicutes-like group was a predominant sulfate reducer in the 0.8mbsf in SMTZ with low SO42- concentration. Overall results indicated that JS1 and two archaeal groups (MBGB and MBGD) seem to play a significant role in carbon and elements cycles in the gas-hydrate-bearing subsurface sediment of the Ulleung Basin.
URI
https://www.tandfonline.com/doi/abs/10.1080/01490451.2016.1159767http://repository.hanyang.ac.kr/handle/20.500.11754/71774
ISSN
0149-0451; 1521-0529
DOI
10.1080/01490451.2016.1159767
Appears in Collections:
RESEARCH INSTITUTE[E](부설연구소) > INSTITUTE OF OCENA AND ATMOSPHERIC SCIENCES(해양ㆍ대기과학연구소) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE