Resistant ammonia-oxidizing archaea endure, but adapting ammonia-oxidizing bacteria thrive in boreal lake sediments receiving nutrient-rich effluents
Aalto, S. L., Saarenheimo, J., Mikkonen, A., Rissanen, A. J., & Tiirola, M. (2018). Resistant ammonia-oxidizing archaea endure, but adapting ammonia-oxidizing bacteria thrive in boreal lake sediments receiving nutrient-rich effluents. Environmental Microbiology, 20(10), 3616-3628. https://doi.org/10.1111/1462-2920.14354
Published inEnvironmental Microbiology
DisciplineAkvaattiset tieteetYmpäristötiedeNanoscience CenterAquatic SciencesEnvironmental ScienceNanoscience Center
© 2018 The Authors. Environmental Microbiology published by Society for Applied Microbiology and John Wiley & Sons Ltd.
Climate change along with anthropogenic activities changes biogeochemical conditions in lake ecosystems, modifying the sediment microbial communities. Wastewater effluents introduce nutrients and organic material but also novel microbes to lake ecosystems, simulating forthcoming increases in catchment loadings. In this work, we first used 16s rRNA gene sequencing to study how the overall sediment microbial community responds to wastewater in six boreal lakes. To examine forthcoming changes in the lake biogeochemistry, we focused on the ammonia‐oxidizing archaea (AOA) and bacteria (AOB), and examined their functional and compositional community response to wastewater. Although we found the least diverse and least resistant prokaryotic communities from the most wastewater‐influenced sediments, the community changed fast toward the natural composition with the diminishing influence of wastewater. Each lake hosted a unique resistant AOA community, while AOB communities were adapting, responding to environmental conditions as well as receiving new members from WWTPs. In general, AOB dominated in numbers in wastewater‐influenced sediments, while the ratio between AOA and AOB increased when moving toward pristine conditions. Our results suggest that although future climate‐change‐driven increases in nutrient loading and microbial migration might significantly disrupt lake sediment microbiomes, they can promote nitrification through adapting and abundant AOB communities. ...
PublisherWiley-Blackwell Publishing Ltd.
Publication in research information system
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Related funder(s)European Commission
Funding program(s)FP7 (EU's 7th Framework Programme)
The content of the publication reflects only the author’s view. The funder is not responsible for any use that may be made of the information it contains.
Additional information about fundingWe are grateful to Olli Nousiainen and Jonna Kuha, who kindly participated the field sampling. The work was supported by the funding of Academy of Finland project 260797, European Commission project LIFE12 ENV/FI/597 (N‐SINK) and European Research Council (ERC) CoG project 615146 for MT, and Academy of Finland projects 310302 for SLA and 286642 for AJR.
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