Long-term warming of a subarctic heath decreases soil bacterial community growth but has no effects on its temperature adaptation |
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| Affiliation: | 1. Microbial Ecology, Department of Biology, Lund University, Ecology Building, SE-22362 Lund, Sweden;2. Department of Environmental Science, University of Eastern Finland, PO Box 1627, FI-70211 Kuopio, Finland;3. Terrestrial Ecology Section, Department of Biology, University of Copenhagen, Øster Farimagsgade 2D, DK-1353 Copenhagen K, Denmark;1. Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China;2. Sichuan University, Chengdu, Sichuan 610041, PR China;3. University of Chinese Academy of Sciences, Beijing 100039, PR China;4. College of Resources and Environment, Southwest University, Chongqing 400715, PR China;1. State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, The Chinese Academy of Sciences, Xiangshan, Beijing 100093, China;2. Key Laboratory of Plant Stress Biology, College of Life Sciences, Henan University, Kaifeng, Henan 475004, China;3. Institute of Grassland, Northeast Normal University, Changchun, Jilin 130024, China;4. College of Ecology and Environmental Science, Inner Mongolia Agricultural University, Huhhot, Inner Mongolia 010018, China;5. Department of Soil Ecology, Helmholtz Centre for Environmental Research – UFZ, D-06120 Halle (Saale), Germany;6. Institute of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland;7. Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia 014010, China;1. Department of Forest Sciences, University of Helsinki, Helsinki, Finland;2. Natural Resources Institute Finland (Luke), Helsinki, Finland;3. Institute for Atmospheric Sciences and Earth System Research, University of Helsinki, Helsinki, Finland;4. Department of Forest Ecology and Management, Swedish University of Agricultural Sciences (SLU), Umeå, Sweden;5. Finnish Meteorological Institute, Helsinki, Finland;6. Faculty of Science, Shinshu University, Matsumoto, Japan;7. Slovenian Forestry Institute, Ljubljana, Slovenia;8. Natural Resources Institute Finland (Luke), Oulu, Finland;1. Key Lab. of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences, Beijing 100101, China;2. Yucheng Comprehensive Experiment Station, China Academy of Science, Beijing 100101, China;3. Department of Soil Science of Temperate Ecosystems, University of Göttingen, 37077 Göttingen, Germany;4. USDA-ARS, National Sedimentation Lab, Oxford, MS 38655, USA;1. Microbial Ecology, Department of Biology, Ecology Building, Lund University, SE-22362 Lund, Sweden;2. Departamento de Bioquímica del Suelo, Instituto de Investigaciones Agrobiológicas de Galicia (IIAG-CSIC), Apartado 122, Avda. Vigo s/n, 15780 Santiago de Compostela, Spain |
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| Abstract: | 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 °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 °C, and both were unaffected by warming. |
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