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Article

Contribution of Small Phytoplankton to Primary Production in the Northern Bering and Chukchi Seas

1
Faculty/Graduate School of Fisheries Sciences, Hokkaido University, Hakodate 041-8611, Japan
2
Department of Oceanography, Pusan National University, Busan 46241, Korea
3
Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology, Yokosuka 237-0061, Japan
4
International Arctic Research Center, University of Alaska Fairbanks, Fairbanks, AK 99775, USA
5
Division of Polar Ocean Sciences, Korea Polar Research Institute, Incheon 21990, Korea
6
National Institute of Polar Research, Tachikawa 190-8518, Japan
*
Author to whom correspondence should be addressed.
Academic Editor: Michele Mistri
Water 2022, 14(2), 235; https://doi.org/10.3390/w14020235
Received: 30 November 2021 / Revised: 7 January 2022 / Accepted: 8 January 2022 / Published: 14 January 2022
(This article belongs to the Special Issue Marine Nitrogen Fixation and Phytoplankton Ecology)
The northern Bering and Chukchi seas are biologically productive regions but, recently, unprecedented environmental changes have been reported. For investigating the dominant phytoplankton communities and relative contribution of small phytoplankton (<2 µm) to the total primary production in the regions, field measurements mainly for high-performance liquid chromatography (HPLC) and size-specific primary productivity were conducted in the northern Bering and Chukchi seas during summer 2016 (ARA07B) and 2017 (OS040). Diatoms and phaeocystis were dominant phytoplankton communities in 2016 whereas diatoms and Prasinophytes (Type 2) were dominant in 2017 and diatoms were found as major contributors for the small phytoplankton groups. For size-specific primary production, small phytoplankton contributed 38.0% (SD = ±19.9%) in 2016 whereas 25.0% (SD = ±12.8%) in 2017 to the total primary productivity. The small phytoplankton contribution observed in 2016 is comparable to those reported previously in the Chukchi Sea whereas the contribution in 2017 mainly in the northern Bering Sea is considerably lower than those in other arctic regions. Different biochemical compositions were distinct between small and large phytoplankton in this study, which is consistent with previous results. Significantly higher carbon (C) and nitrogen (N) contents per unit of chlorophyll-a, whereas lower C:N ratios were characteristics in small phytoplankton in comparison to large phytoplankton. Given these results, we could conclude that small phytoplankton synthesize nitrogen-rich particulate organic carbon which could be easily regenerated. View Full-Text
Keywords: Bering Sea; Chukchi Sea; HPLC; small phytoplankton; primary productivity Bering Sea; Chukchi Sea; HPLC; small phytoplankton; primary productivity
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MDPI and ACS Style

Park, J.-W.; Kim, Y.; Kim, K.-W.; Fujiwara, A.; Waga, H.; Kang, J.J.; Lee, S.-H.; Yang, E.-J.; Hirawake, T. Contribution of Small Phytoplankton to Primary Production in the Northern Bering and Chukchi Seas. Water 2022, 14, 235. https://doi.org/10.3390/w14020235

AMA Style

Park J-W, Kim Y, Kim K-W, Fujiwara A, Waga H, Kang JJ, Lee S-H, Yang E-J, Hirawake T. Contribution of Small Phytoplankton to Primary Production in the Northern Bering and Chukchi Seas. Water. 2022; 14(2):235. https://doi.org/10.3390/w14020235

Chicago/Turabian Style

Park, Jung-Woo, Yejin Kim, Kwan-Woo Kim, Amane Fujiwara, Hisatomo Waga, Jae J. Kang, Sang-Heon Lee, Eun-Jin Yang, and Toru Hirawake. 2022. "Contribution of Small Phytoplankton to Primary Production in the Northern Bering and Chukchi Seas" Water 14, no. 2: 235. https://doi.org/10.3390/w14020235

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