Significant benthic fluxes of bioavailable dissolved amino acids to the ocean: Results from the East/Japan Sea
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 porewate...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2024-02-01
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| Series: | Limnology and Oceanography Letters |
| Online Access: | https://doi.org/10.1002/lol2.10363 |
| _version_ | 1797356240719839232 |
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| author | Hyekyung Park Guebuem Kim Sung‐Han Kim Jae Seong Lee |
| author_facet | Hyekyung Park Guebuem Kim Sung‐Han Kim Jae Seong Lee |
| author_sort | Hyekyung Park |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-08T14:23:46Z |
| format | Article |
| id | doaj.art-f976963ab15541758cb37446d601ce31 |
| institution | Directory Open Access Journal |
| issn | 2378-2242 |
| language | English |
| last_indexed | 2024-03-08T14:23:46Z |
| publishDate | 2024-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | Limnology and Oceanography Letters |
| spelling | doaj.art-f976963ab15541758cb37446d601ce312024-01-13T13:16:42ZengWileyLimnology and Oceanography Letters2378-22422024-02-0191526110.1002/lol2.10363Significant benthic fluxes of bioavailable dissolved amino acids to the ocean: Results from the East/Japan SeaHyekyung Park0Guebuem Kim1Sung‐Han Kim2Jae Seong Lee3School of Earth and Environmental Sciences/Research Institute of Oceanography, Seoul National University Seoul Republic of KoreaSchool of Earth and Environmental Sciences/Research Institute of Oceanography, Seoul National University Seoul Republic of KoreaMarine Environment Research Center, Korea Institute of Ocean Science and Technology Busan Republic of KoreaMarine Environment Research Center, Korea Institute of Ocean Science and Technology Busan Republic of KoreaAbstract 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.https://doi.org/10.1002/lol2.10363 |
| spellingShingle | Hyekyung Park Guebuem Kim Sung‐Han Kim Jae Seong Lee Significant benthic fluxes of bioavailable dissolved amino acids to the ocean: Results from the East/Japan Sea Limnology and Oceanography Letters |
| title | Significant benthic fluxes of bioavailable dissolved amino acids to the ocean: Results from the East/Japan Sea |
| title_full | Significant benthic fluxes of bioavailable dissolved amino acids to the ocean: Results from the East/Japan Sea |
| title_fullStr | Significant benthic fluxes of bioavailable dissolved amino acids to the ocean: Results from the East/Japan Sea |
| title_full_unstemmed | Significant benthic fluxes of bioavailable dissolved amino acids to the ocean: Results from the East/Japan Sea |
| title_short | Significant benthic fluxes of bioavailable dissolved amino acids to the ocean: Results from the East/Japan Sea |
| title_sort | significant benthic fluxes of bioavailable dissolved amino acids to the ocean results from the east japan sea |
| url | https://doi.org/10.1002/lol2.10363 |
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