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Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/154288
Título

Optical properties of dissolved organic matter relate to different depth-specific patterns of archaeal and bacterial community structure in the North Atlantic Ocean

AutorGuerrero-Feijóo, E.; Nieto-Cid, Mar ; Dobal-Amador, Vladimir; Hernando-Morales, Víctor; Sintes, Eva; Álvarez, Marta ; Balagué, Vanessa ; Varela, Marta M.
Palabras clavePyrosequencing
Diversity
DOM optical properties
Marine microbes
CARD-FISH
T-RFLP
ARISA
Deep sea
Atlantic waters
Fecha de publicación2017
EditorOxford University Press
CitaciónFEMS Microbiology Ecology 93(1): 1-14 (2017)
ResumenProkaryotic abundance, activity and community composition were studied in the euphotic, intermediate and deep waters off the Galician coast (NW Iberian margin) in relation to the optical characterization of dissolved organic matter (DOM). Microbial (archaeal and bacterial) community structure was vertically stratified. Among the Archaea, Euryarchaeota, especially Thermoplasmata, was dominant in the intermediate waters and decreased with depth, whereas marine Thaumarchaeota, especially Marine Group I, was the most abundant archaeal phylum in the deeper layers. The bacterial community was dominated by Proteobacteria through the whole water column. However, Cyanobacteria and Bacteroidetes occurrence was considerable in the upper layer and SAR202 was dominant in deep waters. Microbial composition and abundance were not shaped by the quantity of dissolved organic carbon, but instead they revealed a strong connection with the DOM quality. Archaeal communities were mainly related to the fluorescence of DOM (which indicates respiration of labile DOM and generation of refractory subproducts), while bacterial communities were mainly linked to the aromaticity/age of the DOM produced along the water column. Taken together, our results indicate that the microbial community composition is associated with the DOM composition of the water masses, suggesting that distinct microbial taxa have the potential to use and/or produce specific DOM compounds
Descripción14 páginas, 6 figuras, 4 tablas
Versión del editorhttp://dx.doi.org/10.1093/femsec/fiw224
URIhttp://hdl.handle.net/10261/154288
DOI10.1093/femsec/fiw224
ISSN0168-6496
E-ISSN1574-6941
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