title: Changes in the Synechococcus Assemblage Composition at the Surface of the East China Sea Due to Flooding of the Changjiang River.
abstract: The aim of this study was to elucidate how flooding of the Changjiang River affects the assemblage composition of phycoerythrin-rich (PE-rich) Synechococcus at the surface of the East China Sea (ECS). During non-flooding summers (e.g., 2009), PE-rich Synechococcus usually thrive at the outer edge of the Changjiang River diluted water coverage (CDW; salinity ≤31 PSU). In the summer of 2010, a severe flood occurred in the Changjiang River basin. The plentiful freshwater injection resulted in the expansion of the CDW over half of the ECS and caused PE-rich cells to show a uniform distribution pattern, with decreased abundance compared with the non-flooding summer. The phylogenetic diversity of 16S rRNA gene sequences indicated that the flooding event also shifted the picoplankton community composition from being dominated by Synechococcus, mainly attributed to the clade II lineage, to various orders of heterotrophic bacteria, including Actinobacteria, Flavobacteria, α-Proteobacteria, and γ-Proteobacteria. As an increasing number of studies have proposed that global warming might result in more frequent floods, combining this perspective with the information obtained from our previous [1] and this studies yield a more comprehensive understanding of the relationship between the composition of the marine Synechococcus assemblage and global environmental changes.
authors: Institute of Marine Environment and Ecology, National Taiwan Ocean University, Keelung, 20224, Taiwan. chungcc@mail.ntou.edu.tw.|Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, 20224, Taiwan. chungcc@mail.ntou.edu.tw.
authors: Chih-Ching
authors: CC
authors: Chung
authors: Institute of Marine Environment and Ecology, National Taiwan Ocean University, Keelung, 20224, Taiwan.|Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, 20224, Taiwan.
authors: Gwo-Ching
authors: GC
authors: Gong
authors: Institute of Marine Biology, National Taiwan Ocean University, Keelung, 20224, Taiwan.
authors: Chin-Yi
authors: CY
authors: Huang
authors: Department of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, CA, 90095, USA.
authors: Jer-Young
authors: JY
authors: Lin
authors: Institute of Marine Biology, National Taiwan Ocean University, Keelung, 20224, Taiwan.
authors: Yun-Chi
authors: YC
authors: Lin
mesh_terms: D002681:China; D004269:DNA, Bacterial / Q000235:genetics; D055868:Floods; D064307:Microbiota; D008969:Molecular Sequence Data; D010140:Pacific Ocean; D010799:Phycoerythrin / Q000378:metabolism; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012621:Seasons; D012623:Seawater / Q000382:microbiology; D017422:Sequence Analysis, DNA; D046940:Synechococcus / Q000235:genetics / Q000502:physiology*
chemical_list: D004269:DNA, Bacterial; D012336:RNA, Ribosomal, 16S; D010799:Phycoerythrin
keywords: 16S rRNA; East China Sea; Flood; Global change; Synechococcus