Responses of stream microbes to multiple anthropogenic stressors in a mesocosm study

• DOI: 10.1016/j.scitotenv.2018.03.077
• Publication Date: 2018-03-30T03:05:35Z
• Authors: Julia K. Nuy; Anja Lange; Arne J. Beermann; Manfred Jensen; Vasco Elbrecht; Oliver Röhl; Derek Peršoh; Dominik Begerow; Florian Leese; Jens Boenigk
• Keywords: Mesocosm; Stressor

Stream ecosystems are affected by multiple anthropogenic stressors worldwide. Even though effects of many single comparatively well studied, the difficult to predict. In particular bacteria and protists, which responsible for majority ecosystem respiration element flows, infrequently studied with respect responses. We conducted a stream mesocosm experiment characterize responses on microbiota. Two functionally important habitats, leaf litter benthic phototrophic rock biofilms, were exposed three in full factorial design: fine sediment deposition, increased chloride concentration (salinization) reduced flow velocity. analyzed microbial composition two habitat types mesocosms using an amplicon sequencing approach. Community analysis different taxonomic levels as principle component analyses (PCoAs) based realtive abundances operational units (OTUs) showed treatment specific shifts eukaryotic biofilm community. Analysis variance (ANOVA) revealed that Bacillariophyta responded positively salinity increase, while relative read abundance chlorophyte taxa decreased. The combined mainly antagonistic. Therefore, community multiply stressed environments resembled unstressed control terms OTU occurrence abundances.