caa a22 4500 605455201 CHVBK 20210128100211.0 cr unu---uuuuu 210128e20150201xx s 000 0 eng 10.1007/s10872-014-0258-0 doi (NATIONALLICENCE)springer-10.1007/s10872-014-0258-0 Size-fractionated primary production in the Kuroshio Extension and adjacent regions in spring [Elektronische Daten] [Yuta Nishibe, Kazutaka Takahashi, Takuhei Shiozaki, Shigeho Kakehi, Hiroaki Saito, Ken Furuya] Size-fractionated primary production was investigated in the Kuroshio Extension (KE) and adjacent regions from winter to spring in order to understand dynamics of spring phytoplankton bloom. Primary production in both the Kuroshio and KE regions was low in winter and ranged from 61 to 185mgCm−2day−1, and was composed mostly of small phytoplankton (<10µm). While large phytoplankton (>10µm) became major producers in spring with high production of 443-871mgCm−2day−1 in the Kuroshio region, the main primary producers remained small in the KE region, and primary production was not elevated as observed in the Kuroshio, ranging from 82 to 492mgCm−2day−1. Low production in the KE region in spring was associated with a lack of primary production by large phytoplankton, and this was primarily due to the low availability of nitrate and silicic acid in early spring. Within the KE region, primary production tended to be high in the northern edge and around the axis of the first ridge of the KE meandering compared with other regions of KE. The shoaling of the surface mixed layer produced by intrusion of the southern warmer water was responsible for the high primary productivity. The Oceanographic Society of Japan and Springer Japan, 2014 Primary production nationallicence Kuroshio Extension nationallicence Spring bloom nationallicence Size fractionation nationallicence Nutrients nationallicence Kuroshio nationallicence Oyashio nationallicence Nishibe Yuta Department of Aquatic Bioscience, The University of Tokyo, Tokyo, Japan aut Takahashi Kazutaka Department of Aquatic Bioscience, The University of Tokyo, Tokyo, Japan aut Shiozaki Takuhei Department of Aquatic Bioscience, The University of Tokyo, Tokyo, Japan aut Kakehi Shigeho Tohoku National Fisheries Research Institute, Fisheries Research Agency, Miyagi, Japan aut Saito Hiroaki Atomosphere and Ocean Research Institute, The University of Tokyo, Chiba, Japan aut Furuya Ken Department of Aquatic Bioscience, The University of Tokyo, Tokyo, Japan aut Journal of Oceanography Springer Japan 71/1(2015-02-01), 27-40 0916-8370 71:1<27 2015 71 10872 https://doi.org/10.1007/s10872-014-0258-0 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10872-014-0258-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Nishibe Yuta Department of Aquatic Bioscience, The University of Tokyo, Tokyo, Japan aut NATIONALLICENCE 700 1- Takahashi Kazutaka Department of Aquatic Bioscience, The University of Tokyo, Tokyo, Japan aut NATIONALLICENCE 700 1- Shiozaki Takuhei Department of Aquatic Bioscience, The University of Tokyo, Tokyo, Japan aut NATIONALLICENCE 700 1- Kakehi Shigeho Tohoku National Fisheries Research Institute, Fisheries Research Agency, Miyagi, Japan aut NATIONALLICENCE 700 1- Saito Hiroaki Atomosphere and Ocean Research Institute, The University of Tokyo, Chiba, Japan aut NATIONALLICENCE 700 1- Furuya Ken Department of Aquatic Bioscience, The University of Tokyo, Tokyo, Japan aut NATIONALLICENCE 773 0- Journal of Oceanography Springer Japan 71/1(2015-02-01), 27-40 0916-8370 71:1<27 2015 71 10872