Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | The vertical distribution of tetA and intI1 in a deep lake is rather due to sedimentation than to resuspension |
| Abstract | Lakes are exposed to anthropogenic pollution including the release of allochthonous bacteria into their waters. Antibiotic resistance genes (ARGs) stabilize in bacterial communities of temperate lakes, and these environments act as long-term reservoirs of ARGs. Still, it is not clear if the stabilization of the ARGs is caused by a periodical introduction, or by other factors regulated by dynamics within the water column. Here we observed the dynamics of the tetracycline resistance gene (tetA) and of the class 1 integron integrase gene intI1 a proxy of anthropogenic pollution in the water column and in the sediments of subalpine Lake Maggiore, together with several chemical, physical and microbiological variables. Both genes resulted more abundant within the bacterial community of the sediment compared to the water column and the water-sediment interface. Only at the inset of thermal stratification they reached quantifiable abundances in all the water layers, too. Moreover, the bacterial communities of the water-sediment interface were more similar to deep waters than to the sediments. These results suggest that the vertical distribution of tetA and intI1 is mainly due to the deposition of bacteria from the surface water to the sediment, while their resuspension from the sediment is less important. |
| Source | FEMS microbiology, ecology (print) 96 |
| Keywords | antibiotic resistanceintI1freshwater lakevertical columnsediment water interfacebacterial community |
| Journal | FEMS microbiology, ecology (print) |
| Editor | Elsevier, Amsterdam, Paesi Bassi |
| Year | 2020 |
| Type | Articolo in rivista |
| DOI | 10.1093/femsec/fiaa002 |
| Authors | Di Cesare A.; Eckert E.M.; Cottin C.; Bouchez A.; Callieri C.; Contesini M.; Lami A.; Corno G. |
| Text | 420933 2020 10.1093/femsec/fiaa002 Scopus 2 s2.0 85078867804 antibiotic resistance intI1 freshwater lake vertical column sediment water interface bacterial community The vertical distribution of tetA and intI1 in a deep lake is rather due to sedimentation than to resuspension Di Cesare A.; Eckert E.M.; Cottin C.; Bouchez A.; Callieri C.; Contesini M.; Lami A.; Corno G. CNR IRSA Water Research Institute, Molecular Ecology Group MEG . Largo Tonolli 50, Verbania, 28922, , Italy; INRA UMR CARRTEL, 75 ave de Corzent, 74200 Thonon les Bains, , France Lakes are exposed to anthropogenic pollution including the release of allochthonous bacteria into their waters. Antibiotic resistance genes ARGs stabilize in bacterial communities of temperate lakes, and these environments act as long term reservoirs of ARGs. Still, it is not clear if the stabilization of the ARGs is caused by a periodical introduction, or by other factors regulated by dynamics within the water column. Here we observed the dynamics of the tetracycline resistance gene tetA and of the class 1 integron integrase gene intI1 a proxy of anthropogenic pollution in the water column and in the sediments of subalpine Lake Maggiore, together with several chemical, physical and microbiological variables. Both genes resulted more abundant within the bacterial community of the sediment compared to the water column and the water sediment interface. Only at the inset of thermal stratification they reached quantifiable abundances in all the water layers, too. Moreover, the bacterial communities of the water sediment interface were more similar to deep waters than to the sediments. These results suggest that the vertical distribution of tetA and intI1 is mainly due to the deposition of bacteria from the surface water to the sediment, while their resuspension from the sediment is less important. 96 Published version http //www.scopus.com/record/display.url eid=2 s2.0 85078867804 origin=inward Articolo in rivista Elsevier 0168 6496 FEMS microbiology, ecology print FEMS microbiology, ecology print FEMS microbiol. ecol. print FEMS microbiology, ecology. print Federation of European Microbiological Societies microbiology, ecology print mario.contesini CONTESINI MARIO cristiana.callieri CALLIERI CRISTIANA gianluca.corno CORNO GIANLUCA andrea.lami LAMI ANDREA andrea.dicesare DI CESARE ANDREA estermaria.eckert ECKERT ESTER MARIA |