Contents and stable isotopic compositions of organic carbon and total nitrogen in the surface sediment of two coastal bays in Korea SCOPUS KCI

Title
Contents and stable isotopic compositions of organic carbon and total nitrogen in the surface sediment of two coastal bays in Korea
Author(s)
Hyun, S.; Lee, T.; Jung, S.-K.
KIOST Author(s)
Hyun, Sang Min(현상민)Lee, Tae Hee(이태희)
Publication Year
2011
Abstract
Surface sediment from the coastal bays of Gwangyang and Masan in South Korea were analyzed for their contents and isotopic values of organic carbon and total nitrogen. The sources and diagenetic alteration of organic matter were also assessed. Total organic carbon varied from 0.22% to 3.48% (average = 1.40%, n = 75), and C/N ratios varied from 2.4 to 15.2 (average = 8.79, n = 75). δ 13C org ranged from -19.92‰ to -25.86‰ (average = -21.21‰, n = 75), and δ 15N TN ranged from 8.57‰ to 3.93‰ (average = 6.49‰, n = 75). Total organic carbon in both areas was associated with grain-size, with higher contents in finer grained sediment. The high carbon content observed in Masan Bay sediment correlated with its higher C/N ratio. δ 13C org and δ 15N TN varied widely, attributable to various influences such as the input of terrestrial organic matter and diagenetic alteration. The depleted δ 13C org and higher δ 15N TN observed in the sediment of Gwangyang Bay reflected terrestrial supply, implying that biogeochemical processes, i. e. bacterial degradation, were more active in Masan Bay sediment, which showed less depleted δ 13C org and higher δ 15N TN than Gwangyang Bay sediment. δ 15N TN was the more useful indicator of biogeochemical processes in the highly anoxic sediment. These results indicate that the δ 13C org and δ 15N TN of sedimentary organic matter in coastal bays can indicate the source and degree of diagenetic alteration of sedimentary organic matter. © 2011 Korea Ocean Research & Development Institute (KORDI) and the Korean Society of Oceanography (KSO) and Springer Netherlands.
ISSN
1738-5261
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/3941
DOI
10.1007/s12601-011-0022-y
Bibliographic Citation
Ocean Science Journal, v.46, no.4, pp.289 - 297, 2011
Subject
biogeochemistry; coastal sediment; degradation; diagenesis; grain size; isotopic analysis; isotopic composition; nitrogen; organic carbon; organic matter; sediment chemistry; stable isotope; Kwangyang Bay; Masan Bay; South Cholla; South Korea; South Kyongsang; Bacteria (microorganisms)
Keywords
coastal bay; isotopic composition; organic carbon; sediment
Type
Article
Language
English
Document Type
Article
Related Researcher
Research Interests

Marine environmentology,Marine environmentology,Organic chemistry,해양환경학,화학해양학,유기화학

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