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Title: Vigorous growth of Synechococcus spp. in the East China Sea during an Asian dust storm event
Authors: J. Chang
Chung, C.-C.
C.-W. Liao
G.-C. Gong
S.-P. L. Hwang
Contributors: 國立臺灣海洋大學:海洋環境化學與生態研究所
Date: 2008
Issue Date: 2017-02-10T03:12:23Z
Publisher: The 2008 Ocean Sciences Meeting
Abstract: Investigations focused on the effects of dust storms on the ecology of phytoplankton have been limited. The aim of this study was to reveal the succession of pico-phytoplankton in the oligotrophic waters of the East China Sea during Asain dust storms. According long-term observation, Synechococcus is dominant in the water columns over the continental shelf, and Prochlorococcus is restricted to the outer edge of the East China Sea where the Kuroshio Current flowed-through. In spring, 2007, we conducted cruises to a station located at the shelf break of the East China Sea (25.05oN, 123.15oE). We found that vigorous growth of Synechococcus from 1.4 × 104 to 1.0 × 105 cells ml-1 occurred during Mar. 16 to Mar. 18, and then decreased to 4.1 × 104 cells ml-1 at Mar. 19, 2007. Phylogenetic analysis of 16S rRNA sequences revealed that the most of these newly appeared Synechococcus belonged to Clade II. Furthermore, all of mRNA levels of 3 nutrient stress markers including idiA (Fe stress marker), ntcA (N stress marker), and pstS (P stress marker), decreased from prominent values to non-detectable levels during the dust storm. These results suggested that the contribution of Fe, N, and P by the dust deposition from dust storm or by turbulence jointly promoted the growth of Synechococcus on the outer edge of the East China Sea.
Appears in Collections:[Institute of Marine Environment and Ecology] Lecture & Seminar

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