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

Maria Väisänen, Konstantin Gavazov, Eveline J. Krab, Ellen Dorrepaal

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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 3years of winter warming in combination with the in vitro effects of a rapid warming (6days) 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 degrees C) or at rapidly increased temperatures, i.e., a warm spell (18 degrees C) but induced changes (P

Original languageEnglish
Pages (from-to)186-190
Number of pages5
JournalMicrobial Ecology
Volume77
Issue number1
DOIs
Publication statusPublished - 2018
MoEC publication typeA1 Journal article-refereed

Keywords

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

Field of science

  • Ecology, evolutionary biology

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