| Text | 428909 2020 10.1016/j.envpol.2020.114823 Scopus 2 s2.0 85085743487 SedimentsPollutionHeavy metalsMetal resistance genesMicrobial diversity The role of metal contamination in shaping microbial communities in heavily polluted marine sediments Di Cesare A.; Pjevac P.; Eckert E.; Curkov N.; Miko Sparica M.; Corno G.; Orlic S. MEG Molecular Ecology Group, Water Research Institute, CNR IRSA, Largo Tonolli 50, Verbania, 28922, MEG Molecular Ecology Group, Water Research Institute, CNR IRSA, Largo Tonolli 50, 28922 Verbania, Italy, , Italy; University of Vienna, Center for Microbiology and Environmental Systems Science, Division of Microbial Ecology, Vienna, University of Vienna, Center for Microbiology and Environmental Systems Science, Division of Microbial Ecology, Vienna, Austria, , Austria; Joint Microbiome Facility of the Medical University of Vienna and the University of Vienna, Vienna, 1090, Joint Microbiome Facility of the Medical University of Vienna and the University of Vienna, 1090, Vienna, Austria, , Austria; Ru er Bo kovi Institute, Division for Marine and Environmental Research, Zagreb, Ruder Boskovic Institute, Division for Marine and Environmental Research, Zagreb, Croatia, , Croatia; Croatian Geological Survey, Zagreb, Croatian Geological Survey, Zagreb, Croatia, , Croatia; Ru er Bo kovi Institute, Division of Material Chemistry, Zagreb, Ruder Boskovic Institute, Division of Material Chemistry, Zagreb, Croatia, , Croatia; Center of Excellence for Science and Technology Integrating Mediterranean Region, Microbial Ecology, Zagreb, Center of Excellence for Science and Technology Integrating Mediterranean Region, Microbial Ecology, Zagreb, Croatia, , Croatia Heavy metal pollution is less important than nutrient availability in structuring sedimentary microbial communities, but does significantly influence the abundance of metal resistance genes. Microorganisms in coastal sediments are fundamental for ecosystem functioning, and regulate processes relevant in global biogeochemical cycles. Still, our understanding of the effects anthropogenic perturbation and pollution can have on microbial communities in marine sediments is limited. We surveyed the microbial diversity, and the occurrence and abundance of metal and antibiotic resistance genes is sediments collected from the Pula Bay Croatia , one of the most significantly polluted sites along the Croatian coast. With a collection of 14 samples from the bay area, we were able to generate a detailed status quo picture of a site that only recently started a cleaning and remediation process closing of sewage pipes and reduction of industrial activity . The concentrations of heavy metals in Pula Bay sediments are significantly higher than in pristine sediments from the Adriatic Sea, and in some cases, manifold exceed international sediment quality guidelines. While the sedimentary concentrations of heavy metals did significantly influence the abundance of the tested metal resistance genes, no strong effect of heavy metal pollution on the overall microbial community composition was observed. Like in many other marine sediments, Gammaproteobacteria, Bacteroidota and Desulfobacterota dominated the microbial community composition in most samples, and community assembly was primarily driven by water column depth and nutrient carbon and nitrogen availability, regardless of the degree of heavy metal pollution. 265 Published version http //www.scopus.com/record/display.url eid=2 s2.0 85085743487 origin=inward Articolo in rivista Elsevier Applied Science Publishers 0269 7491 Environmental pollution 1987 Environmental pollution 1987 Environ. pollut. 1987 Environmental pollution 1987 gianluca.corno CORNO GIANLUCA andrea.dicesare DI CESARE ANDREA estermaria.eckert ECKERT ESTER MARIA |
