Organic matter cycle by biogeochemical indicator in tidal mud flat, west coast of Korea SCOPUS KCI

Title
Organic matter cycle by biogeochemical indicator in tidal mud flat, west coast of Korea
Author(s)
Lee, D.-H.; Lee, J.-H.; Jeong, K.-S.; Woo, H.J.; Kang, J.; Shin, K.-H.; Ha, S.-Y.
KIOST Author(s)
Lee, Jun Ho(이준호)Jeong, Kap Sik(정갑식)Woo, Han Jun(우한준)Kang, Jeong Won(강정원)
Alternative Author(s)
이동헌; 이준호; 정갑식; 우한준; 강정원
Publication Year
2014
Abstract
To understand the degradation processes of organic matter related to sulfate reduction by Sulfate Reduction Bacteria (SRB) in the tidal flat sediments of Hwang-do and Sogeun-ri, Tae-an Peninsula in Chungnam-do, biogeochemical characteristics were analyzed and highlighted using specific microbial biomarkers. The organic geochemical parameters (TOC, Δ13Corg, C/N ratio, long-chain-n-alkane) indicate that most of the organic matter has been derived from marine phytoplankton and bacteria in the fine-grained sediment of Sogeun-ri, although terrestrial plant components have occasionally been incorporated to a significant degree in the coarse-grained sediment of Hwang-do. The concentration of sulfate in pore water is a constant tendency with regard to depth profile, while methane concentration appears to be slightly different with regard to depth profile at the two sites. Especially, the sum of bacteria fatty acid (a-C15:0 + i-C15:0 + C16:1w5) confirms that the these concentrations in Sogeun-ri are related to the degradation of Benzene, Toluene, Ethylbenzene and Xylene (BTEX) compounds from the crude oil retained in the sediments as a result of the Hebei Spirit oil-spill accident in 2007. The methane-related microbial communities as shown by lipid biomarkers (crocetane, PMI) are larger in some sedimentary sections of Hwang-do than in the Sogeunri tidal flat. These findings suggest that methane production by microbiological processes is clearly governed by SRB activity along the vertical succession in organic-enriched tidal flats.
ISSN
1598-141X
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/2961
DOI
10.4217/OPR.2014.36.1.025
Bibliographic Citation
Ocean and Polar Research, v.36, no.1, pp.25 - 37, 2014
Publisher
Korea Ocean Research and Development Institute
Keywords
Lipid biomarker; Organic matter; Stable carbon isotope; Sulfate reduction bacteria; Tidal flat
Type
Article
Language
Korean
Document Type
Article
Publisher
Korea Ocean Research and Development Institute
Related Researcher
Research Interests

Coastal Sedimentary Processes,Micropaleontology(Foraminifera and Pollen),Paleoenvironmental Reconstruction,연안퇴적작용,미고생물(유공충 및 화분),고환경 복원

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