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Dispersal timing and drought history influence the response of bacterioplankton to drying–rewetting stress
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Limnology.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Limnology.
2017 (English)In: The ISME Journal, ISSN 1751-7362, E-ISSN 1751-7370Article in journal (Refereed) Epub ahead of print
Abstract [en]

The extent and frequency of drought episodes is expected to increase in the following decades making it a crucial stress factor for smaller water bodies. However, very little is known about how bacterioplankton is affected by increased evaporation and how these communities reassemble after rewetting. Here, we present results from a microcosm experiment that assessed the effect of drying–rewetting stress on bacterioplankton in the light of the stress history and the rate and timing of dispersal after the rewetting. We found that the drying phase resulted mainly in a change of function, whereas the complete desiccation and rewetting processes strongly affected both composition and function, which were, however, influenced by the initial conditions and stress history of the communities. Effects of dispersal were generally stronger when it occurred at an early stage after the rewetting. At this stage, selective establishment of dispersed bacteria coupled with enhanced compositional and functional recovery was found, whereas effects of dispersal were neutral, that is, predictable by dispersal rates, at later stages. Our studies therefore show that both the stress history and the timing of dispersal are important factors that influence the response of bacterial communities to environmental change and stress events.

Place, publisher, year, edition, pages
2017.
National Category
Microbiology Oceanography, Hydrology, Water Resources
Identifiers
URN: urn:nbn:se:uu:diva-323603DOI: 10.1038/ismej.2017.55OAI: oai:DiVA.org:uu-323603DiVA: diva2:1106842
Available from: 2017-06-08 Created: 2017-06-08 Last updated: 2017-06-09Bibliographically approved

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Székely, Anna J.Langenheder, Silke
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Citation style
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