期刊
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
卷 23, 期 5, 页码 4242-4256出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-015-4768-0
关键词
Marine microbial ecotoxicology; Sea surface microlayer; PAH; MPN; qPCR; CE-SSCP
资金
- research project IBISCUS (Indicateurs Biologiques et chImiques de Contaminations UrbaineS) from Universite Aix-Marseille2/CNRS-INSU
- Continental and Coastal Ecosphere (EC2CO) program from CNRS
- Institut des Sciences de l'Univers (INSU)
- Agence Nationale de la Recherche (ANR)-Ademe/Ecotechnologies program [ANR-ECOTECH 09-ECOT-009-01]
We evaluated the relative impact of anthropogenic polycyclic aromatic hydrocarbons (PAHs) among biogeochemical variables on total, metabolically active, and PAH bacterial communities in summer and winter in surface microlayer (SML) and subsurface seawaters (SSW) across short transects along the NW Mediterranean coast from three harbors, one wastewater effluent, and one nearshore observatory reference site. At both seasons, significant correlations were found between dissolved total PAH concentrations and PAH-degrading bacteria that formed a gradient from the shore to nearshore waters. Accumulation of PAH degraders was particularly high in the SML, where PAHs accumulated. Harbors and wastewater outfalls influenced drastically and in a different way the total and active bacterial community structure, but they only impacted the communities from the nearshore zone (<2 km from the shore). By using direct multivariate statistical analysis, we confirmed the significant effect of PAH concentrations on the spatial and temporal dynamic of total and active communities in this area, but this effect was putted in perspective by the importance of other biogeochemical variables.
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