Comparison of the seasonal variations of Synechococcus assemblage structures in estuarine waters and coastal waters of Hong Kong

Applied and Environmental Microbiology
Xiaomin XiaHongbin Liu

Abstract

Seasonal variation in the phylogenetic composition of Synechococcus assemblages in estuarine and coastal waters of Hong Kong was examined through pyrosequencing of the rpoC1 gene. Sixteen samples were collected in 2009 from two stations representing estuarine and ocean-influenced coastal waters, respectively. Synechococcus abundance in coastal waters gradually increased from 3.6 × 10(3) cells ml(-1) in March, reaching a peak value of 5.7 × 10(5) cells ml(-1) in July, and then gradually decreased to 9.3 × 10(3) cells ml(-1) in December. The changes in Synechococcus abundance in estuarine waters followed a pattern similar to that in coastal waters, whereas its composition shifted from being dominated by phycoerythrin-rich (PE-type) strains in winter to phycocyanin-only (PC-type) strains in summer owing to the increase in freshwater discharge from the Pearl River and higher water temperature. The high abundance of PC-type Synechococcus was composed of subcluster 5.2 marine Synechococcus, freshwater Synechococcus (F-PC), and Cyanobium. The Synechococcus assemblage in the coastal waters, on the other hand, was dominated by marine PE-type Synechococcus, with subcluster 5.1 clades II and VI as the major lineages from April to Septembe...Continue Reading

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Citations

Oct 25, 2016·Ground Water·Thomas B AtherholtSandra M Goodrow
Dec 15, 2017·Genome Génome / Conseil National De Recherches Canada·Blake MatthewsRomana Limberger
Feb 3, 2019·Applied and Environmental Microbiology·Paula HuberFernando Unrein
Jul 22, 2017·Frontiers in Microbiology·Xiaomin XiaHongbin Liu
Aug 15, 2020·Frontiers in Microbiology·Ulysse GuyetLaurence Garczarek
Jul 13, 2018·Frontiers in Microbiology·Helen M de Jesus AffeMariângela Menezes

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