DOI: 10.1007/s10533-017-0314-0
Scopus记录号: 2-s2.0-85014564497
论文题名: Rapid laboratory measurement of the temperature dependence of soil respiration and application to changes in three diverse soils through the year
作者: Robinson J.M. ; O’Neill T.A. ; Ryburn J. ; Liang L.L. ; Arcus V.L. ; Schipper L.A.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 133, 期: 1 起始页码: 101
结束页码: 112
语种: 英语
英文关键词: Arrhenius
; Carbon
; Respiration
; Soil
; Temperature
Scopus关键词: carbon cycle
; environmental response
; incubation
; laboratory method
; measurement method
; microbial community
; moisture content
; precision
; soil carbon
; soil moisture
; soil respiration
; temperature gradient
; testing method
英文摘要: Determining the temperature dependence of soil respiration is needed to test predictive models such as Arrhenius-like functions and macro-molecular rate theory (MMRT). We tested a method for rapid measurement of respiration using a temperature gradient block, cooled at one end (~2 °C) and heated at the other (~50 °C) that accommodated 44 tubes containing soil incubated at roughly 1 °C increments. Gas samples were taken after 5 h incubation and analysed for CO2. The temperature gradient block allowed rapid assessment of temperature dependence of soil respiration with the precision needed to test models and explore existing theories of how temperature and moisture interact to control biochemical processes. Temperature response curves were well fitted by MMRT and allowed calculation of the temperature at which absolute temperature sensitivity was maximal (Tinf). We measured temperature response of three soils at seven moisture contents and showed that the absolute rate and sensitivity of respiration was partly dependent on adjusted moisture content. This result implied that comparisons between soils need to be made at a common moisture content. We also measured potential changes in the temperature dependence (and sensitivity) of respiration for three different soils collected at one site throughout a year. Tinf ranged from 43 to 51 °C for the three soils. Tinf and temperature sensitivity were not dependent on soil type collected but was partly dependent on time of year of collection. Temporal changes in temperature response suggested that the microbial communities may tune their metabolisms in response to changes in soil temperatures. © 2017, Springer International Publishing Switzerland. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83292
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: School of Science, University of Waikato, Private Bag 3105, Hamilton, New Zealand
Recommended Citation:
Robinson J.M.,O’Neill T.A.,Ryburn J.,et al. Rapid laboratory measurement of the temperature dependence of soil respiration and application to changes in three diverse soils through the year[J]. Biogeochemistry,2017-01-01,133(1)