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Responses of stream microbes to multiple anthropogenic stressors in a mesocosm study.
Nuy, Julia K; Lange, Anja; Beermann, Arne J; Jensen, Manfred; Elbrecht, Vasco; Röhl, Oliver; Persoh, Derek; Begerow, Dominik; Leese, Florian; Boenigk, Jens.
Afiliação
  • Nuy JK; Department of Biodiversity, University of Duisburg - Essen, Universitaetsstraße 5, D-45141 Essen, Germany. Electronic address: julia.nuy@uni-due.de.
  • Lange A; Department of Bioinformatics and Computational Biophysics, University of Duisburg - Essen, Universitaetsstraße 5, D-45141 Essen, Germany. Electronic address: anja.lange@uni-due.de.
  • Beermann AJ; Aquatic Ecosystem Research, University of Duisburg - Essen, Universitaetsstraße 5, D-45141 Essen, Germany. Electronic address: arne.beermann@uni-due.de.
  • Jensen M; Department of Biodiversity, University of Duisburg - Essen, Universitaetsstraße 5, D-45141 Essen, Germany. Electronic address: manfred.jensen@uni-due.de.
  • Elbrecht V; Aquatic Ecosystem Research, University of Duisburg - Essen, Universitaetsstraße 5, D-45141 Essen, Germany. Electronic address: vasco.elbrecht@uni-due.de.
  • Röhl O; Department of Geobotany, Ruhr - Universitaet Bochum, Universitaetsstraße. 150, D-44801 Bochum, Germany.
  • Persoh D; Department of Geobotany, Ruhr - Universitaet Bochum, Universitaetsstraße. 150, D-44801 Bochum, Germany.
  • Begerow D; Department of Geobotany, Ruhr - Universitaet Bochum, Universitaetsstraße. 150, D-44801 Bochum, Germany.
  • Leese F; Aquatic Ecosystem Research, University of Duisburg - Essen, Universitaetsstraße 5, D-45141 Essen, Germany. Electronic address: florian.leese@uni-due.de.
  • Boenigk J; Department of Biodiversity, University of Duisburg - Essen, Universitaetsstraße 5, D-45141 Essen, Germany. Electronic address: jens.boenigk@uni-due.de.
Sci Total Environ ; 633: 1287-1301, 2018 Aug 15.
Article em En | MEDLINE | ID: mdl-29758882
ABSTRACT
Stream ecosystems are affected by multiple anthropogenic stressors worldwide. Even though effects of many single stressors are comparatively well studied, the effects of multiple stressors are difficult to predict. In particular bacteria and protists, which are responsible for the majority of ecosystem respiration and element flows, are infrequently studied with respect to multiple stressors responses. We conducted a stream mesocosm experiment to characterize the responses of single and multiple stressors on microbiota. Two functionally important stream habitats, leaf litter and benthic phototrophic rock biofilms, were exposed to three stressors in a full factorial

design:

fine sediment deposition, increased chloride concentration (salinization) and reduced flow velocity. We analyzed the microbial composition in the two habitat types of the mesocosms using an amplicon sequencing approach. Community analysis on different taxonomic levels as well as principle component analyses (PCoAs) based on realtive abundances of operational taxonomic units (OTUs) showed treatment specific shifts in the eukaryotic biofilm community. Analysis of variance (ANOVA) revealed that Bacillariophyta responded positively salinity and sediment increase, while the relative read abundance of chlorophyte taxa decreased. The combined effects of multiple stressors were mainly antagonistic. Therefore, the community composition in multiply stressed environments resembled the composition of the unstressed control community in terms of OTU occurrence and relative abundances.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Microbiologia da Água / Monitoramento Ambiental / Ecossistema / Rios Idioma: En Ano de publicação: 2018 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Microbiologia da Água / Monitoramento Ambiental / Ecossistema / Rios Idioma: En Ano de publicação: 2018 Tipo de documento: Article