WEKO3
アイテム
Contribution of riverine dissolved organic carbon to organic carbon decomposition in the Ariake Sea, Japan, a coastal area suffering from summer hypoxia
http://hdl.handle.net/10069/00041925
http://hdl.handle.net/10069/00041925b2ffec98-0623-405b-9d66-bca142bfae60
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
AS85_17.pdf (673.9 kB)
|
|
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2022-12-05 | |||||
| タイトル | ||||||
| タイトル | Contribution of riverine dissolved organic carbon to organic carbon decomposition in the Ariake Sea, Japan, a coastal area suffering from summer hypoxia | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Dissolved organic carbon | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | riverine organic matter | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | hypoxia | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | carbon stable isotope ratio | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| 著者 |
Takasu, Hiroyuki
× Takasu, Hiroyuki× Okamura, Tomohiro× Komorita, Tomohiro× Shiragaki, Tomohiro× Uchino, Koji |
|||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Dissolved organic carbon (DOC) comprises nearly half of the riverine organic carbon flux into oceans. Although riverine DOC is involved in numerous important ecosystem functions, excessive labile DOC inputs from rivers may contribute to hypoxia in coastal systems. Furthermore, many aspects of the contribution of riverine DOC to hypoxia are unknown. The natural carbon stable isotope ratio (δ13C) in organic matter can be used to identify sources of organic carbon in coastal oceans. In this study, we analyzed the concentrations and δ13C values of DOC in the bottom layer of the northern Ariake Sea, Japan, in which hypoxic water develops during summer. Additionally, we compared the δ13C values of DOC at the beginning and end of an incubation experiment to determine the contribution of riverine DOC decomposition to hypoxia. The results of this study indicate that the bottom DOC concentration is influenced by both phytoplankton and river water, with the former likely having a stronger impact in the northwestern Ariake Sea in summer. Nevertheless, we also found major contributions (~ 49.7%) of DOC decomposition to total organic carbon decomposition at some stations. The initial δ13C value of DOC ranged from − 24.0 to − 22.2‰, and the DOC δ13C increased (from + 0.3 to + 0.8‰) in three of the five incubation bottles after incubation. This might be caused by selective decomposition of 13C-depleted organic matter. The decomposed DOC in those bottles must be mainly derived from terrestrial sources. This result implies that riverine DOC decomposition contributes to hypoxia formation in the bottom layer of the northern Ariake Sea. | |||||
| 書誌情報 |
Aquatic Sciences 巻 85, 号 1, p. 17, 発行日 2022-11-27 |
|||||
| 出版者 | ||||||
| 出版者 | Springer Nature | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 1015-1621 | |||||
| DOI | ||||||
| 関連タイプ | isVersionOf | |||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1007/s00027-022-00920-0 | |||||
| 権利 | ||||||
| 権利情報 | © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2022. This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: http://dx.doi.org/10.1007/s00027-022-00920-0. | |||||
| 著者版フラグ | ||||||
| 出版タイプ | AM | |||||
| 出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
| 引用 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | Aquatic Sciences, 85(1), art. no. 17; 2022 | |||||
