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The Legacy Effects of Winter Climate on Microbial Functioning After Snowmelt in a Subarctic Tundra
2018 (English)In: Microbial Ecology, ISSN 0095-3628, 1432-184X, Vol. 77, no 1, p. 186-190Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2018. Vol. 77, no 1, p. 186-190
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:polar:diva-7788DOI: 10.1007/s00248-018-1213-1OAI: oai:DiVA.org:polar-7788DiVA, id: diva2:1281587
Funder
Swedish Research Council, 621-2011-5444Swedish Research Council Formas, 214-2011-788Knut and Alice Wallenberg Foundation, 2012.0152Available from: 2019-01-22 Created: 2019-01-22 Last updated: 2019-01-22Bibliographically approved

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Publisher's full texthttps://link.springer.com/article/10.1007/s00248-018-1213-1
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