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Diversity and abundance of sulfate-reducing microorganisms in a Mediterranean lagoonal complex (Amvrakikos Gulf, Ionian Sea) derived from dsrB gene
Pavloudi, C.; Oulas, A.; Vasileiadou, K.; Kotoulas, G.; De Troch, M.; Friedrich, M.W.; Arvanitidis, C. (2017). Diversity and abundance of sulfate-reducing microorganisms in a Mediterranean lagoonal complex (Amvrakikos Gulf, Ionian Sea) derived from dsrB gene. Aquat. Microb. Ecol. 79(3): 209-219. https://dx.doi.org/10.3354/ame01829
In: Aquatic Microbial Ecology. Inter-Research: Oldendorf/Luhe. ISSN 0948-3055; e-ISSN 1616-1564
Peer reviewed article  
Available in  Authors 
    Vlaams Instituut voor de Zee: Open Marine Archive 303086 [ download pdf ]
Keyword
    Marine/Coastal
Author keywords
    dsrB gene · Amvrakikos Gulf · Lagoon · Pyrosequencing · Sediment · Sulfate-reducing microorganisms
Authors  Top 
  • Pavloudi, C.
  • Oulas, A.
  • Vasileiadou, K.
  • Kotoulas, G.
  • De Troch, M.
  • Friedrich, M.W.
  • Arvanitidis, C.
Abstract
    Sulfate-reducing microorganisms (SRMs) are a phylogenetically and physiologically diverse group of microorganisms, responsible for the dissimilatory reduction of sulfate. SRMs thrive under anaerobic conditions with high availability of organic matter. Such conditions characterize lagoonal ecosystems which experience regular dystrophic crises. The aim of the present study was to explore the biodiversity patterns of SRMs and to examine the extent to which these patterns are associated with biogeographic and environmental factors. Sediment samples were collected from 5 lagoons in the Amvrakikos Gulf (Ionian Sea, western Greece). DNA was extracted from the sediment and was further processed through pyrosequencing of a region of the dissimilatory sulfite reductase β-subunit (dsrB). The results of this exploratory study show that the majority of the observed operational taxonomic units (OTUs) belong to the Deltaproteobacteria supercluster and more specifically, to the Desulfobacteraceae family. Salinity and ammonium ions are the environmental factors that best correlated with the SRM community pattern. Furthermore, the SRM community of the brackish lagoons is differentiated from that of the brackish-marine lagoons and the studied lagoons have distinct SRM communities.
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