Rates of total oxygen uptake of sediments and benthic nutrient fluxes measured using an in situ autonomous benthic chamber in the sediment of the slope off the southwestern part of Ulleung Basin, East Sea
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Title
- Rates of total oxygen uptake of sediments and benthic nutrient fluxes measured using an in situ autonomous benthic chamber in the sediment of the slope off the southwestern part of Ulleung Basin, East Sea
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Author(s)
- Lee, Jae Seong; An, Sung-Uk; Park, Young-Gyu; Kim, Eunsoo; Kim, Dongseon; Kwon, Jung No; Kang, Dong-Jin; Noh, Jae-Hoon
- KIOST Author(s)
- Lee, Jae Seong(이재성); Park, Young Gyu(박영규); Kim, Dong Seon(김동선); Kang, Dong Jin(강동진)
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Alternative Author(s)
- 이재성; 박영규; 김은수; 김동선; 강동진; 노재훈
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Publication Year
- 2015-09
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Abstract
- We have developed a new autonomous benthic lander for deep-sea research, the Korea Institute of Ocean Science and Technology (KIOST) BelcII and BelpII. The benthic lander was successfully tested at 950 and 1450 m water depths on the slope off the southwestern part of the Ulleung Basin in the East Sea of Korea. The ex situ measurements of the total oxygen uptake (TOU) rates at all the stations exceeded the in situ measurement values, and may indicate artificial effects from onboard incubation. The TOU rates were estimated to be 5.80 mmol m(-2) d(-1) and 3.77 mmol m(-2) d(-1) at water depths of 950 m and 1450 m, respectively. The benthic nutrient fluxes were also higher at water depths of 950 m, which indicates a partitioning of organic degradation with water depth. In addition, the negative phosphate and nitrogen benthic flux ratios and the higher nitrate removal flux via the sediment-water interface at the slope imply that the nitrogen in the bottom water may be preferentially removed via microbial respiration processes in the sediments, and may be coupled with the low nitrogen-to-phosphate ratio found in the deep water. Although our measurements comprised just two experiments in the slope sediment, the robust in situ measurement of the benthic fluxes in the slope sediment is a forerunner for new research into the biogeochemical cycles across the shelf edge-slope-basin system in the East Sea.
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ISSN
- 1738-5261
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URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/2416
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DOI
- 10.1007/s12601-015-0053-x
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Bibliographic Citation
- OCEAN SCIENCE JOURNAL, v.50, no.3, pp.581 - 588, 2015
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Publisher
- KOREA OCEAN RESEARCH DEVELOPMENT INST
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Subject
- ORGANIC-CARBON; SULFATE REDUCTION; CONTINENTAL-SLOPE; ATLANTIC; LANDER; WATER; RESPIRATION
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Keywords
- autonomous in situ benthic lander; total oxygen uptake; slope sediment; biogeochemical organic carbon cycles; benthic nutrient fluxes; net nitrogen removal; East Sea
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Type
- Article
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Language
- English
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Document Type
- Article
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