Changes in the characteristics of organic matter associated with hydrodynamics and phytoplankton size structure in the central-eastern Yellow Sea SCIE SCOPUS

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Title
Changes in the characteristics of organic matter associated with hydrodynamics and phytoplankton size structure in the central-eastern Yellow Sea
Author(s)
Lee, Yeon Jung; Choi, Dong Han; Lee, Ho Won; Hyun, Myung Jin; Kim, Gi Yeong; Lee, Haeun; Yang, Won Seok; Kim, Ji Hoon; Won, Jong Seok; Ra, Kongtae; Jeong, Hyeryeong; Choi, Jin Young; Lee, Seok; Kim, Moon Koo; Noh, Jae Hoon
KIOST Author(s)
Lee, Ho Won(이호원)Hyun, Myung Jin(현명진)Kim, Gi Yeong(김기영)Lee, Haeun(이하은)Yang, Won Seok(양원석)Kim, Ji Hoon(김지훈)Won, Jong Seok(원종석)Ra, Kongtae(나공태)Jeong, Hyeryeong(정혜령)Lee, Seok(이석)Noh, Jae Hoon(노재훈)
Alternative Author(s)
이연정; 최동한; 이호원; 현명진; 김기영; 이하은; 양원석; 김지훈; 원종석; 나공태; 정혜령; 최진영; 이석; 김문구; 노재훈
Publication Year
2021-11
Abstract
The central-eastern Yellow Sea is an important region for transporting organic matter (OM) to the Pacific Ocean, however, there is limited information available regarding the characteristics and sources of OM in this area. The present study investigated the concentrations and stable isotopic compositions of carbon (δ13C) and nitrogen (δ15N) for particulate matter and sediment in the central-eastern Yellow Sea during April 2019. The physicochemical properties (i.e., salinity, temperature, fluorescence, and nutrients), size-fractionated phytoplankton biomass (Chl-a), and concentration and fluorescence characteristics of dissolved organic matter (DOM) were also determined. The satellite SST and Chl-a data indicated that mixing cold and warm water masses were observed. Phytoplankton blooms occurred a few days before our sampling campaign. Considering the high concentration of suspended solids in the bottom layer, resuspended sediment caused by tidal currents could be a major source of OM in coastal areas. The δ13C values of particulate organic matter (POM) in the coastal area were higher (−22 to −23‰) than those of OM from terrestrial sources (approximately −27 to −28‰). Instead, the lowest δ13C values were observed in the central part of our study area, where the relative abundance of picophytoplankton was high. These results indicated that phytoplankton-derived OM after phytoplankton spring blooms in the coastal area could be the primary source of OM rather than terrestrial origins. In addition, the source of OM that presented low δ13C values could be picophytoplankton-derived OM. The characteristics of DOM were related to biological processes (mediated by phytoplankton and bacteria) and resuspension of sedimentary organic matter. We did not detect an influx of large amounts of terrestrial OM in coastal sediments. Overall, the source and characteristics of OM appeared to be influenced by the hydrodynamics and the distribution properties of lower trophic-level organisms in the central-eastern Yellow Sea during the spring season.
ISSN
0048-9697
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/41766
DOI
10.1016/j.scitotenv.2021.151781
Bibliographic Citation
Science of the Total Environment, 2021
Publisher
Elsevier BV
Keywords
Yellow Sea; Physical-biogeochemical interactions; Hydrodynamics; Stable isotope ratio; PARAFAC
Type
Article
Language
English
Publisher
Elsevier BV
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