Significant benthic fluxes of bioavailable dissolved amino acids to the ocean: Results from the East/Japan Sea
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Title
- Significant benthic fluxes of bioavailable dissolved amino acids to the ocean: Results from the East/Japan Sea
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Author(s)
- Park, Hyekyung; Kim, Guebuem; Kim, Sung Han; Lee, Jae Seong
- KIOST Author(s)
- Kim, Sung Han(김성한); Lee, Jae Seong(이재성)
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Alternative Author(s)
- 김성한; 이재성
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Publication Year
- 2024-02
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Abstract
- We measured dissolved organic carbon (DOC) and total dissolved amino acid (TDAA) in seawater and sediment porewater of the Ulleung Basin in the East/Japan Sea. The DOC and TDAA concentrations were 1.1- and 1.4-fold higher in the euphotic zone, and 11- and 43-fold higher in sediment porewater, respectively, than those in the deep ocean. Consequently, in the deep ocean, TDAA and DOC input fluxes from porewater were 2- and 0.4-fold of those from the euphotic zone, respectively. This larger contribution of benthic flux for TDAA and its shorter residence time in the benthic boundary layer (BBL) (1.3 ± 0.9 yr) seem to result in steep TDAA increases in the BBL, although DOC concentrations remained relatively uniform throughout the entire deep ocean. AA-derived indices also show enhanced bioavailability of dissolved organic matter in the BBL. Benthic inputs seem to supply a significant amount of bioavailable TDAA to the deep ocean, fueling microbial activity.
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ISSN
- 2378-2242
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URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/44697
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DOI
- 10.1002/lol2.10363
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Bibliographic Citation
- Limnology and Oceanography Letters, v.9, no.1, pp.52 - 61, 2024
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Publisher
- Wiley | Association for the Sciences of Limnology and Oceanography (ASLO)
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Type
- Article
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Language
- English
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Document Type
- Letter; Early Access
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