The Legacy Effects of Winter Climate on Microbial Functioning After Snowmelt in a Subarctic Tundra

  • Maria Väisänen
  • Konstantin Gavazov
  • Eveline J. Krab
  • Ellen Dorrepaal
Soil Microbiology

Abstract

Warming-induced increases in microbial CO2 release in northern tundra may positively feedback to climate change. However, shifts in microbial extracellular enzyme activities (EEAs) may alter the impacts of warming over the longer term. We investigated the in situ effects of 3 years of winter warming in combination with the in vitro effects of a rapid warming (6 days) on microbial CO2 release and EEAs in a subarctic tundra heath after snowmelt in spring. Winter warming did not change microbial CO2 release at ambient (10 °C) or at rapidly increased temperatures, i.e., a warm spell (18 °C) but induced changes (P < 0.1) in the Q10 of microbial respiration and an oxidative EEA. Thus, although warmer winters may induce legacy effects in microbial temperature acclimation, we found no evidence for changes in potential carbon mineralization after spring thaw.

Keywords

Snow manipulation Extracellular enzymes β-Glucosidase Phenol oxidase Microbial respiration PLFA 

Notes

Acknowledgements

Jacob DeKraai assisted in field and laboratory work. PLFA analyses were conducted in the École Polytechnique Fédérale de Lausanne (EPFL), School of Architecture, Civil and Environmental Engineering (ENAC), Laboratory of Ecological Systems (ECOS), in Lausanne, Switzerland. Ann Milbau, Jonatan Klaminder, Frida Keuper, Kobayashi Makoto, Gesche Blume-Werry, and Marina Becher assisted in setting the experimental design.

Funding Information

This project was funded by grants from Vetenskapsrådet (621-2011-5444), Formas (214-2011-788), and a Wallenberg Academy Fellowship (KAW 2012.0152) to E. Dorrepaal.

Supplementary material

248_2018_1213_MOESM1_ESM.docx (325 kb)
ESM 1 (DOCX 324 kb)

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018
corrected publication June/2018

Authors and Affiliations

  • Maria Väisänen
    • 1
    • 2
  • Konstantin Gavazov
    • 1
    • 3
  • Eveline J. Krab
    • 1
    • 4
  • Ellen Dorrepaal
    • 1
  1. 1.Climate Impacts Research Center, EMGUmeå UniversityAbiskoSweden
  2. 2.Arctic Centre, University of LaplandRovaniemiFinland
  3. 3.Swiss Federal Institute for Forest, Snow and Landscape Research WSLLausanneSwitzerland
  4. 4.Department of Soil and EnvironmentSwedish University of Agricultural SciencesUppsalaSweden

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