Multiple nitrogen sources for primary production inferred from δ13C and δ15N in the southern Sea of Japan

Kodama, Taketoshi; Nishimoto, Atsushi; Nakamura, Ken-ichi; Nakae, Misato; Iguchi, Naoki; Igeta, Yosuke; Kogure, Yoichi

doi:https://doi.org/10.5194/bg-20-3667-2023

Articles | Volume 20, issue 17

https://doi.org/10.5194/bg-20-3667-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/bg-20-3667-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 20, issue 17

Research article

|

13 Sep 2023

Research article |

| 13 Sep 2023

Multiple nitrogen sources for primary production inferred from δ¹³C and δ¹⁵N in the southern Sea of Japan

Taketoshi Kodama, Atsushi Nishimoto, Ken-ichi Nakamura, Misato Nakae, Naoki Iguchi, Yosuke Igeta, and Yoichi Kogure

Supplement

https://doi.org/10.5194/bg-20-3667-2023-supplement

Data sets

Carbon and nitrogen stable isotope ratios of particulate organic matter in the southern Sea of Japan from 2018 to 2021 Taketoshi Kodama, Atsushi Nishimoto, Ken-ichi Nakamura, Misato Nakae, Naoki Iguchi, Yosuke Igeta, and Yoichi Kogure https://doi.org/10.1594/PANGAEA.949287

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Short summary

Carbon and nitrogen are essential elements for organisms; their stable isotope ratios (¹³C : ¹²C, ¹⁵N : ¹⁴N) are useful tools for understanding turnover and movement in the ocean. In the Sea of Japan, the environment is rapidly being altered by human activities. The ¹³C : ¹²C of small organic particles is increased by active carbon fixation, and phytoplankton growth increases the values. The ¹⁵N : ¹⁴N variations suggest that nitrates from many sources contribute to organic production.