TY - JOUR
T1 - Biodiversity of prokaryotic communities in sediments of different sub-basins of the Venice lagoon
AU - Borin, Sara
AU - Brusetti, Lorenzo
AU - Daffonchio, Daniele
AU - Delaney, Eugenia
AU - Baldi, Franco
PY - 2009/6/1
Y1 - 2009/6/1
N2 - Microbial community structure and diversity in the wide and shallow Venice lagoon were assessed, prior to construction of mobile dams, at nine stations representative of four different sub-basins previously selected on the basis of international guidelines for sediment quality. The sediments were mainly anoxic and were colonized by microbial communities the species richness of which was quantitatively correlated with total elemental sulfur and acid-volatile sulfide. Automated ribosomal intergenic spacer analysis clustered the stations into three groups. One station for each group was hence analyzed in detail for bacterial and archaeal diversity by screening of 16S rRNA gene clone libraries. The dominance of Gammaproteobacteria clones (84% with a high proportion of Vibrionaceae, indicator of urban pollution) determined significant divergence of the station adjacent to industrial and metropolitan areas. Bacteroidetes were widespread, especially where prairies of aquatic plants are located. The other two analyzed stations were dominated by bacterial taxa implicated in the sulfur cycle: the anoxygenic photosynthetic Chromatiales, sulfate- and sulfur-reducing Desulfobacterales and Desulfuromonadales, and members of the Alpha- and Epsilonproteobacteria.
AB - Microbial community structure and diversity in the wide and shallow Venice lagoon were assessed, prior to construction of mobile dams, at nine stations representative of four different sub-basins previously selected on the basis of international guidelines for sediment quality. The sediments were mainly anoxic and were colonized by microbial communities the species richness of which was quantitatively correlated with total elemental sulfur and acid-volatile sulfide. Automated ribosomal intergenic spacer analysis clustered the stations into three groups. One station for each group was hence analyzed in detail for bacterial and archaeal diversity by screening of 16S rRNA gene clone libraries. The dominance of Gammaproteobacteria clones (84% with a high proportion of Vibrionaceae, indicator of urban pollution) determined significant divergence of the station adjacent to industrial and metropolitan areas. Bacteroidetes were widespread, especially where prairies of aquatic plants are located. The other two analyzed stations were dominated by bacterial taxa implicated in the sulfur cycle: the anoxygenic photosynthetic Chromatiales, sulfate- and sulfur-reducing Desulfobacterales and Desulfuromonadales, and members of the Alpha- and Epsilonproteobacteria.
KW - Anthropogenic impact
KW - Microbial communities
KW - Sediments
KW - Sulfur species
KW - Venice lagoon
UR - http://www.scopus.com/inward/record.url?scp=68049097194&partnerID=8YFLogxK
U2 - 10.1016/j.resmic.2009.04.005
DO - 10.1016/j.resmic.2009.04.005
M3 - Article
C2 - 19416751
AN - SCOPUS:68049097194
VL - 160
SP - 307
EP - 314
JO - Research in Microbiology
JF - Research in Microbiology
SN - 0923-2508
IS - 5
ER -