English
español
Please use this identifier to cite or link to this item:
http://hdl.handle.net/10261/154839
Share/Impact:
Statistics |
![]() ![]() ![]() |
|
|
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |||
|
Title: | Wastewater pollution differently affects the antibiotic resistance gene pool and biofilm bacterial communities across streambed compartments |
Authors: | Subirats, Jèssica; Triadó-Margarit, Xavier ![]() ![]() |
Keywords: | Streambed biofilms Wastewater effluents Antibiotic pollution Antibiotic resistance genes Aquatic Resistome Ebre river Raw sewage |
Issue Date: | 2017 |
Publisher: | Wiley-Blackwell |
Citation: | Molecular Ecology : DOI: 10.1111/mec.14288 (2017) |
Abstract: | Wastewater discharges introduce antibiotic residues and antibiotic-resistant bacteria (ARB) into surface waters. Both inputs directly affect the streambed resistome, either by exerting a selective pressure that favour the proliferation of resistant phenotypes or by enriching the resident communities with wastewater-associated ARB. Here, we investigated the impact of raw and treated urban wastewater discharges on epilithic (growing on rocks) and epipsammic (growing on sandy substrata) streambed biofilms. The effects were assessed by comparing control and impact sites (i) on the composition of bacterial communities; (ii) on the abundance of twelve antibiotic resistance genes (ARGs) encoding resistance to b-lactams, fluoroquinolones, sulphonamides, tetracyclines, macrolides and vancomycin, as well as the class 1 integron-integrase gene (intI1); (iii) on the occurrence of wastewater-associated bacteria, including putative pathogens, and their potential linkage to target ARGs. We measured more pronounced effects of raw sewage than treated wastewater at the three studied levels. This effect was especially noticeable in epilithic biofilms, which showed a higher contribution of wastewater-associated bacteria and ARB than in epipsammic biofilms. Comparison of correlation coefficients obtained between the relative abundance of both target ARGs and operational taxonomic units classified as either potential pathogens or nonpathogens yielded significant higher correlations between the former category and genes intI1, sul1, sul2 and ermB. Altogether, these results indicate that wastewater-associated micro-organisms, including potential pathogens, contribute to maintain the streambed resistome and that epilithic biofilms appear as sensitive biosensors of the effect of wastewater pollution in surface waters. |
Description: | Este artículo contiene 15 páginas, 5 figuras, 1 tabla. |
Publisher version (URL): | http://dx.doi.org/10.1111/mec.14288 |
URI: | http://hdl.handle.net/10261/154839 |
DOI: | http://dx.doi.org/10.1111/mec.14288 |
ISSN: | 0962-1083 |
Appears in Collections: | (CEAB) Artículos |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Restringido.pdf | 15,38 kB | Adobe PDF | ![]() View/Open |
Show full item record
Review this work
Review this work
WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.