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Spatial and temporal variability among marine Bacteroidetes populations in the NW Mediterranean Sea

AutorDíez-Vives, Cristina ; Gasol, Josep M. ; Acinas, Silvia G.
Palabras claveStructure
Spatial and temporal variability
Bacteroidetes populations
Fecha de publicaciónfeb-2014
EditorUrban and Fischer
CitaciónSystematic and Applied Microbiology 37(01): 68-78 (2014)
ResumenThe abundance and structure of Bacteroidetes populations at diverse temporal and spatial scales were investigated in the Northwestern Mediterranean Sea. At a temporal scale, their relative abundance exhibited a marked seasonality, since it was higher in spring and decreased in winter. Similarly, Bacteroidetes community structure encompassed three main groups (winter, spring and summer-fall), which mimicked global bacterioplankton seasonality. At the spatial scale, relative abundances were similar in all surface samples along an inshore-offshore transect, but they decreased with depth. Analysis of the community structure identified four markedly different groups mostly related to different depths. Interestingly, seasonal changes in abundance and community structure were not synchronized. Furthermore, richness was higher when Bacteroidetes were less abundant. The variability of Bacteroidetes contributions to community structure in the temporal and spatial scales was correlated with different environmental factors: day length was the most important factor at the temporal scale, and salinity at the spatial scale. The community composition in terms of phylotypes changed significantly over time and along the depth gradients, but season or depth-specific phylogenetic clusters were not identified. Delineation of coherent Bacteroidetes sub-clusters should help to uncover higher resolution patterns within Bacteroidetes, and explore associations with environmental and biological variables. © 2013 Elsevier GmbH
Descripción11 pages, 5 figures, 2 tables, 1 appendix supplementary data associated with this article can befound, in the online version, at http://dx.doi.org/10.1016/j.syapm.2013.08.006
Versión del editorhttp://dx.doi.org/10.1016/j.syapm.2013.08.006
Identificadoresdoi: 10.1016/j.syapm.2013.08.006
issn: 0723-2020
e-issn: 1618-0984
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