DOI: 10.1111/gcb.12996
论文题名: Microbial physiology and soil CO2 efflux after 9 years of soil warming in a temperate forest - no indications for thermal adaptations
作者: Schindlbacher A. ; Schnecker J. ; Takriti M. ; Borken W. ; Wanek W.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2015
卷: 21, 期: 11 起始页码: 4265
结束页码: 4277
语种: 英语
英文关键词: Enzyme activities
; Gross N mineralization
; Soil CO2 efflux
; Soil warming
; Substrate use efficiency
; Thermal adaptation
Scopus关键词: adaptation
; carbon dioxide
; carbon flux
; enzyme activity
; microbial community
; mineralization
; nitrogen
; physiology
; soil carbon
; soil microorganism
; soil organic matter
; substrate
; temperate forest
; carbon dioxide
; nitrogen
; soil
; acclimatization
; Austria
; chemistry
; forest
; greenhouse effect
; metabolism
; microbiology
; season
; soil
; Acclimatization
; Austria
; Carbon Dioxide
; Forests
; Global Warming
; Nitrogen
; Seasons
; Soil
; Soil Microbiology
英文摘要: Thermal adaptations of soil microorganisms could mitigate or facilitate global warming effects on soil organic matter (SOM) decomposition and soil CO2 efflux. We incubated soil from warmed and control subplots of a forest soil warming experiment to assess whether 9 years of soil warming affected the rates and the temperature sensitivity of the soil CO2 efflux, extracellular enzyme activities, microbial efficiency, and gross N mineralization. Mineral soil (0-10 cm depth) was incubated at temperatures ranging from 3 to 23 °C. No adaptations to long-term warming were observed regarding the heterotrophic soil CO2 efflux (R10 warmed: 2.31 ± 0.15 μmol m-2 s-1, control: 2.34 ± 0.29 μmol m-2 s-1; Q10 warmed: 2.45 ± 0.06, control: 2.45 ± 0.04). Potential enzyme activities increased with incubation temperature, but the temperature sensitivity of the enzymes did not differ between the warmed and the control soils. The ratio of C : N acquiring enzyme activities was significantly higher in the warmed soil. Microbial biomass-specific respiration rates increased with incubation temperature, but the rates and the temperature sensitivity (Q10 warmed: 2.54 ± 0.23, control 2.75 ± 0.17) did not differ between warmed and control soils. Microbial substrate use efficiency (SUE) declined with increasing incubation temperature in both, warmed and control, soils. SUE and its temperature sensitivity (Q10 warmed: 0.84 ± 0.03, control: 0.88 ± 0.01) did not differ between warmed and control soils either. Gross N mineralization was invariant to incubation temperature and was not affected by long-term soil warming. Our results indicate that thermal adaptations of the microbial decomposer community are unlikely to occur in C-rich calcareous temperate forest soils. © 2015 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61671
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Forest Ecology, Federal Research and Training Centre for Forests, Natural Hazards and Landscape - BFW, Seckendorff-Gudent Weg 8, Vienna, Austria; Department of Microbiology and Ecosystem Science, University of Vienna, Althanstraße 14, Vienna, Austria; Lancaster Environment Center, University of Lancaster, Lancaster, United Kingdom; Department of Soil Ecology, University of Bayreuth, Dr. Hans-Frisch-Straße 1-3, Bayreuth, Germany
Recommended Citation:
Schindlbacher A.,Schnecker J.,Takriti M.,et al. Microbial physiology and soil CO2 efflux after 9 years of soil warming in a temperate forest - no indications for thermal adaptations[J]. Global Change Biology,2015-01-01,21(11)