Phytoplankton growth and consumption by microzooplankton stimulated by turbulent nitrate flux suggest rapid trophic transfer in the oligotrophic Kuroshio

Kobari, Toru; Honma, Taiga; Hasegawa, Daisuke; Yoshie, Naoki; Tsutsumi, Eisuke; Matsuno, Takeshi; Nagai, Takeyoshi; Kanayama, Takeru; Karu, Fukutaro; Suzuki, Koji; Tanaka, Takahiro; Guo, Xinyu; Kume, Gen; Nishina, Ayako; Nakamura, Hirohiko

doi:https://doi.org/10.5194/bg-17-2441-2020

Articles | Volume 17, issue 9

Biogeosciences, 17, 2441–2452, 2020

https://doi.org/10.5194/bg-17-2441-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Biogeosciences, 17, 2441–2452, 2020

https://doi.org/10.5194/bg-17-2441-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 17, issue 9

Research article 06 May 2020

Research article | 06 May 2020

Phytoplankton growth and consumption by microzooplankton stimulated by turbulent nitrate flux suggest rapid trophic transfer in the oligotrophic Kuroshio

Toru Kobari et al.

Supplement

https://doi.org/10.5194/bg-17-2441-2020-supplement

Data sets

Biogeosci17_Kobari.zip T. Kobari https://doi.org/10.6084/m9.figshare.12198486.v1

Short summary

We report on biological productivity under turbulent nitrate flux amplified with the Kuroshio. Oceanographic observations exhibit that the Kuroshio topographically enhances significant turbulent mixing and nitrate influx to the euphotic zone. Onboard experiments show phytoplankton and microzooplankton growths enhanced with the nitrate flux and a significant microzooplankton grazing on phytoplankton. These rapid and systematic trophodynamics enhance biological productivity in the Kuroshio.