NDLI: Sedimentary organic carbon budget of coastal sediments and the importance of benthic-pelagic coupling off Namhae Island in the South Sea of Korea

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Sedimentary organic carbon budget of coastal sediments and the importance of benthic-pelagic coupling off Namhae Island in the South Sea of Korea

Content Provider	Springer Nature Link
Author	Lee, Jae Seong Han, Jeong Hee An, Sung Uk Na, Taehee Kwon, Jung No Kim, Eun Soo
Copyright Year	2014
Abstract	We characterized the biogeochemical organic carbon cycles in the surface sediment layer (< 25 cm) in the coastal waters of Namhae off the South Sea of Korea. The total and diffusive sediment oxygen uptake rates were measured using an in situ benthic lander equipped with a benthic chamber and a microprofiler. The bottom water above the sediment-water interface was incubated to estimate the benthic flux of the dissolved inorganic nutrients and the total alkalinity using an in situ benthic chamber. In addition, the particulate materials vertically deposited onto the surface sediment and the sedimentation rates were quantified to calculate the sedimentary organic carbon budget. The total oxygen uptake rate was in the range 34.9 to 54.1 mmol O$_{2}$ m$^{-2}$d$^{-1}$, which is about three times the diffusive oxygen uptake rate. An abnormal oxygen peak observed in the anoxic sediment layer suggests a higher bioirrigation activity in the sediment layer. The oxidation rate of organic carbon at the sediment surface showed a very narrow range (36 ± 7 to 37 ± 7 mmol C m$^{-2}$d$^{-1}$), and the burial flux into the sediment layer was in the range 3 to 13 mmol C m$^{-2}$d$^{-1}$, which accounted for 9% to 36% of the remineralization rate of the organic carbon. The N and P requirement fluxes for pelagic production could be supported by 29% and 42% of the benthic flux, respectively, which strongly suggests a benthic-pelagic coupling in the coastal area of the South Sea of Korea.
Starting Page	433
Ending Page	447
Page Count	15
File Format	PDF
ISSN	17385261
Journal	Ocean Science Journal
Volume Number	49
Issue Number	4
e-ISSN	20057172
Language	English
Publisher	Korea Ocean Research and Development Institute and The Korean Society of Oceanography
Publisher Date	2015-01-07
Publisher Place	Springer
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	benthic chamber benthic flux organic carbon oxidation sedimentation rate benthic pelagic coupling sediment oxygen uptake rate Oceanography Marine & Freshwater Sciences Waste Water Technology Water Pollution Control Water Management Aquatic Pollution
Content Type	Text
Resource Type	Article
Subject	Oceanography

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