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DatoValore
TitleBacterioplankton community shifts associated with epipelagic and mesopelagic waters in the Southern Ocean
AbstractThe Southern Ocean is among the least explored marine environments on Earth, and still little is known about regional and vertical variability in the diversity of Antarctic marine prokaryotes. In this study, the bacterioplankton community in both epipelagic and mesopelagic waters was assessed at two adjacent stations by high-throughput sequencing and quantitative PCR. Water temperature was significantly higher in the superficial photic zone, while higher salinity and dissolved oxygen were recorded in the deeper water layers. The highest abundance of the bacterioplankton was found at a depth of 75 m, corresponding to the deep chlorophyll maximum layer. Both Alphaproteobacteria and Gammaproteobacteria were the most abundant taxa throughout the water column, while more sequences affiliated to Cyanobacteria and unclassified bacteria were identified from surface and the deepest waters, respectively. Temperature was the most significant environmental variable affecting the bacterial community structure. The bacterial community composition displayed significant differences at the epipelagic layers between two stations, whereas those in the mesopelagic waters were more similar to each other. Our results indicated that the epipelagic bacterioplankton might be dominated by short-term environmental variable conditions, whereas the mesopelagic communities appeared to be structured by longer water-mass residence time and relative stable environmental factors.
SourceScientific reports (Nature Publishing Group) 5, pp. 1–10
KeywordsMicrobial diversitySouthern Ocean
JournalScientific reports (Nature Publishing Group)
EditorNature Publishing Group, London, Regno Unito
Year2015
TypeArticolo in rivista
DOI10.1038/srep12897
AuthorsYu, Zheng; Yang, Jun; Liu, Lemian; Zhang, Wenjing; Amalfitano, Stefano
Text348312 2015 10.1038/srep12897 ISI Web of Science WOS 000359197800001 Scopus 2 s2.0 84938942031 Microbial diversity Southern Ocean Bacterioplankton community shifts associated with epipelagic and mesopelagic waters in the Southern Ocean Yu, Zheng; Yang, Jun; Liu, Lemian; Zhang, Wenjing; Amalfitano, Stefano Array; Array; Natl Res Council Italy IRSA CNR The Southern Ocean is among the least explored marine environments on Earth, and still little is known about regional and vertical variability in the diversity of Antarctic marine prokaryotes. In this study, the bacterioplankton community in both epipelagic and mesopelagic waters was assessed at two adjacent stations by high throughput sequencing and quantitative PCR. Water temperature was significantly higher in the superficial photic zone, while higher salinity and dissolved oxygen were recorded in the deeper water layers. The highest abundance of the bacterioplankton was found at a depth of 75 m, corresponding to the deep chlorophyll maximum layer. Both Alphaproteobacteria and Gammaproteobacteria were the most abundant taxa throughout the water column, while more sequences affiliated to Cyanobacteria and unclassified bacteria were identified from surface and the deepest waters, respectively. Temperature was the most significant environmental variable affecting the bacterial community structure. The bacterial community composition displayed significant differences at the epipelagic layers between two stations, whereas those in the mesopelagic waters were more similar to each other. Our results indicated that the epipelagic bacterioplankton might be dominated by short term environmental variable conditions, whereas the mesopelagic communities appeared to be structured by longer water mass residence time and relative stable environmental factors. 5 Published version Bacterioplankton community shifts associated with epipelagic and mesopelagic waters in the Southern Ocean Versione pubblicata Yu_2015_SciRep_Southern Ocean.pdf Articolo in rivista Nature Publishing Group 2045 2322 Scientific reports Nature Publishing Group Scientific reports Nature Publishing Group Scientific reports Nature Publishing Group stefano.amalfitano AMALFITANO STEFANO