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

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Cited articles

Bower, J. R., Nakamura, Y., Mori, K., Yamamoto, J., Isoda, Y., and Sakurai, Y.: Distribution of Todarodes pacificus (Cephalopoda: Ommastrephidae) paralarvae near the Kuroshio off southern Kyushu, Japan, Mar. Biol., 135, 99–106, 1999. 
Calbet, A. and Landry, M. R.: Mesozooplankton influences on the microbial food web: Direct and indirect trophic interactions in the oligotrophic open-ocean, Limnol. Oceanogr., 44, 1370–1380, 1999. 
Calbet, A. and Landry, M. R.: Nunnery S. Bacteria-flagellate interactions in the microbial food web of the oligotrophic subtropical North Pacific, Aquat. Microb. Ecol., 23, 283–292, 2001. 
Calbet, A. and Landry, M. R.: Phytoplankton growth, microzooplankton grazing, and carbon cycling in marine systems, Limnol. Oceanogr., 49, 51–57, 2004. 
Calbet, A. and Saiz, E.: The ciliate-copepod link in marine ecosystems, Aquat. Microb. Ecol., 38, 157–167, 2005. 
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.
Final-revised paper