| Item type |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2024-05-01 |
| タイトル |
|
|
タイトル |
East-west variabilities of N2 fixation activity in the subtropical North Pacific Ocean in summer: the field evidence of iron and phosphorus co-limitation in the western area |
|
言語 |
en |
| 言語 |
|
|
言語 |
eng |
| 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 |
堀井, 幸子
高橋, 一生
| en |
Takahashi, Kazutaka
The University of Tokyo
|
| ja |
高橋, 一生
東京大学
|
| ja-Kana |
タカハシ, カズタカ
|
Search repository
塩崎, 拓平
| en |
Shiozaki, Takuhei
The University of Tokyo
|
| ja |
塩崎, 拓平
東京大学
|
| ja-Kana |
シオザキ, タクヘイ
|
Search repository
武田, 重信
| en |
Takeda, Shigenobu
Nagasaki University
|
| ja |
武田, 重信
長崎大学
|
| ja-Kana |
タケダ, シゲノブ
|
Search repository
佐藤, 光秀
| en |
Sato, Mitsuhide
The University of Tokyo
|
| ja |
佐藤, 光秀
東京大学
|
| ja-Kana |
サトウ, ミツヒデ
|
Search repository
山口, 珠葉
滝野, 翔大
橋濱, 史典
| en |
Hashihama, Fuminori
Tokyo University of Marine Science and Technology
|
| ja |
橋濱, 史典
|
| ja-Kana |
ハシハマ, フミノリ
|
|
東京海洋大学
|
Search repository
近藤, 能子
| en |
Kondo, Yoshiko
Nagasaki University
|
| ja |
近藤, 能子
長崎大学
|
| ja-Kana |
コンドウ, ヨシコ
|
Search repository
竹村, 俊彦
| en |
Takemura, Toshihiko
Kyushu University
|
| ja |
竹村, 俊彦
九州大学
|
| ja-Kana |
タケムラ, トシヒコ
|
Search repository
古谷, 研
|
| 抄録 |
|
|
内容記述タイプ |
Abstract |
|
内容記述 |
In the subtropical North Pacific, the east-west gradient of iron deposition as atmospheric Asian dust strongly affects the zonal distribution of biological N2 fixation activity in numerical models, but the in-situ relationship at a basin-scale is not well examined. We examined the trans-Pacific zonal variation in N2 fixation activity on 23°N in summer along with environmental parameters that potentially influence diazotrophy. Dissolved inorganic iron (DFe) was consistently low (<0.4 nM) throughout the transect. The atmospheric dust iron (dust-Fe) flux increased westward, whereas phosphate and labile phosphoric monoesters in the surface decreased westward. N2 fixation varied between 34.6 and 298 μmol-N m−2 d−1 and was high (>200 μmol-N m−2 d−1) in the central area (150–180°W). N2 fixation rates significantly increased with dust-Fe input only in the western area (137–180°E), whereas the contribution of DFe diffused from below the euphotic zone was often larger in the eastern area (120–170°W). N2 fixation was considerably low in the phosphate-depleted western area despite the excess amount of iron relative to phosphate, and it increased with the labile phosphoric monoesters stock. These indicated that N2 fixation was primarily limited by phosphorus in the western area, though this activity also increased with iron supply from dust, likely due to phosphorus-iron co-limitation. In contrast, in the phosphorus-repleted eastern area, iron supplied from dust and below the euphotic zone appeared to limit N2 fixation. Overall, N2 fixation in the subtropical North Pacific was likely limited by zonally different factors relating to iron and phosphorus availability. |
|
言語 |
en |
| 書誌情報 |
en : Journal of Geophysical Research: Oceans
巻 128,
号 6,
p. e2022JC019249,
発行日 2023-05-26
|
| 出版者 |
|
|
出版者 |
American Geophysical Union |
|
言語 |
en |
| ISSN |
|
|
収録物識別子タイプ |
EISSN |
|
収録物識別子 |
2169-9291 |
| DOI |
|
|
関連タイプ |
isIdenticalTo |
|
|
識別子タイプ |
DOI |
|
|
関連識別子 |
10.1029/2022JC019249 |
| 情報源 |
|
|
関連タイプ |
isIdenticalTo |
|
|
識別子タイプ |
Local |
|
|
関連識別子 |
23235015 |
|
|
言語 |
ja |
|
|
関連名称 |
水産資源研究所 水産資源研究センター 海洋環境部 |
| 関連サイト |
|
|
関連タイプ |
isIdenticalTo |
|
|
識別子タイプ |
URI |
|
|
関連識別子 |
https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2022JC019249 |
|
|
言語 |
en |
|
|
関連名称 |
JGR Oceans |
| 著者版フラグ |
|
|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
Horii et al., East-West variabilities of N2 fixation activity.pdf (650 KB)
