Journal
CONTINENTAL SHELF RESEARCH
Volume 88, Issue -, Pages 216-227Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.csr.2014.08.001
Keywords
Picophytoplankton; Spatial and temporal distributions; Indicator; Changjiang plume; Kuroshio intrusion; Northern East China Sea
Categories
Funding
- NFRDI (Research on the impact of climate change on fisheries and countermeasures)
- Korea Research Foundation (The effects of climate change and the input of Yellow Sea Warm Current on the distribution of warm water plankton in the Yellow Sea) [20100010162]
- INHA UNIVERSITY Research Grant
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To investigate the temporal-spatial distribution of picophytoplankton in relation to different water masses in the northern East China Sea (ECS), picophytoplankton abundance and biomass were investigated using flow cytometry with environmental factors in May, August, and November 2010 and February 2012. Five picophytoplankton populations, including Prochlorococcus (Pro), low and high orange fluorescence Synechococcus (Syn1 and Syn2), and small and large sized picoeukaryotes (SPEuks and LPEuks) were discriminated, and each group responded differently to the water mass distribution. Synl was the predominant group in the picophytoplankton abundance in all seasons, indicating ecological importance as a primary producer in the northern ECS. LPEuks was a minor group in terms of the abundance but they contributed significantly to the total picophytoplankton carbon biomass in spring and winter due to their larger size among picophytoplankton groups. Two geographical groups were distinguished in the northern ECS. One group (including Synl and LPEuks) was distributed mainly in the western area affected by the Changjiang discharge and Chinese coastal waters, and the other group (including Pro, Syn2, and SPEuks) dominated picophytoplankton abundance in the eastern area characterized by the Kuroshio intrusion. Pro was detected in the eastern side of the study area during each survey, except in May, indicating the possible effect of the low Kuroshio intrusion on the northern ECS in late spring. This study shows that the distributions of these picophytoplanktons are strongly influenced by the seasonal fluctuations of the Changjiang discharge and Kuroshio intrusion in the northern ECS. (C) 2014 Elsevier Ltd. All rights reserved.
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