Long-term warming of a subarctic heath decreases soil bacterial community growth but has no effects on its temperature adaptation

We tested whether bacterial communities of subarctic heath soil are adapted to elevated temperature after experimental warming by open-top greenhouses for 7 or 17 years. The long-term warming by 1-2 degrees C significantly decreased bacterial community growth, by 28% and 73% after 7 and 17 years, re...

Full description

Bibliographic Details
Published in:Applied Soil Ecology
Main Authors: Rinnan, Riikka, Michelsen, Anders, Bååth, Erland
Format: Article in Journal/Newspaper
Language:English
Published: Elsevier 2011
Subjects:
Biological Sciences
Arctic
Bacterial growth
Climate warming
Microbial community
adaptation
Thymidine incorporation
Temperature response
Subarctic
Online Access:https://lup.lub.lu.se/record/1936349
https://doi.org/10.1016/j.apsoil.2010.12.011
Description
Summary:We tested whether bacterial communities of subarctic heath soil are adapted to elevated temperature after experimental warming by open-top greenhouses for 7 or 17 years. The long-term warming by 1-2 degrees C significantly decreased bacterial community growth, by 28% and 73% after 7 and 17 years, respectively. The decrease was most likely due to decreased availability of labile substrate under warming. However, we found no evidence for temperature adaptation of soil bacterial communities. The optimum temperature for bacterial growth was on average 25 C, and the apparent minimum temperature for growth between -7.3 and -6.1 degrees C. and both were unaffected by warming. (C) 2011 Elsevier B.V. All rights reserved.

Similar Items