Arid
DOI10.1016/j.soilbio.2010.05.025
Short-term temperature dependence of heterotrophic soil respiration after one-month of pre-incubation at different temperatures
Hamdi, Salwa1; Chevallier, Tiphaine1; Ben Aissa, Nadhira2; Ben Hammouda, Moncef3; Gallali, Tahar4; Chotte, Jean-Luc1; Bernoux, Martial1
通讯作者Chevallier, Tiphaine
会议名称19th International Symposium on Environmental Biogeochemistry (ISEB)
会议日期SEP 14-18, 2009
会议地点Hamburg, GERMANY
英文摘要

Quantification of microbial activities involved in soil organic carbon (SOC) decomposition is critical for the prediction of the long-term impact of climate change on soil respiration (SR) and SOC stock. Although the temperature sensitivity of SR is especially critical in semi-arid regions, such as North West Tunisia, where the SOC stock is low, little research has been carried out in these environments. More needs to be known about factors, such as SOC availability that influence temperature sensitivity. In this study, soil samples were incubated with and without glucose addition for 28 days after a 28-day pre-incubation period. Pre-incubation and incubation was carried out at 20 degrees C, 30 degrees C, 40 degrees C and 50 degrees C. Respiration measurements were taken with temperature, glucose addition and incubation time as independent variables. The highest pre-incubation temperature reduced the temperature sensitivity of SR during the subsequent incubation period, both with and without glucose addition. Soil samples pre-incubated at 50 degrees C had the lowest SR at all subsequent incubation temperatures and the lowest temperature sensitivity of SR, even after glucose addition. However, after glucose addition, the effect of a high pre-incubation temperature on soil respiration lasted only two days. Measuring the water-soluble carbon (WSC) in soil samples suggested that the high pre-incubation temperature may have killed part of the microbial biomass, modified microbial communities or solubilized SOC. For quantifying the possible effect of global warming, in particular heat waves, on soil respiration in the soil studied, the results indicate a moderate response of soil respiration to temperature at high temperatures, as shown by Q(10) close to 1.7, even in the range 40-50 degrees C. (C) 2010 Elsevier Ltd. All rights reserved.


英文关键词Climate change Temperature perturbations Soil respiration Microorganism activity Glucose addition Pre-incubation temperatures
来源出版物SOIL BIOLOGY & BIOCHEMISTRY
ISSN0038-0717
出版年2011
卷号43
期号9
页码1752-1758
出版者PERGAMON-ELSEVIER SCIENCE LTD
类型Article;Proceedings Paper
语种英语
国家France;Tunisia
收录类别SCI-E ; CPCI-S
WOS记录号WOS:000294942300002
WOS关键词ORGANIC-MATTER DECOMPOSITION ; SUBSTRATE AVAILABILITY ; MICROBIAL BIOMASS ; CARBON MINERALIZATION ; CLIMATE-CHANGE ; FOREST SOILS ; SENSITIVITY ; CO2 ; ACCLIMATION ; COMMUNITIES
WOS类目Soil Science
WOS研究方向Agriculture
资源类型会议论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/299230
作者单位1.IRD, INRA, SupAgro, UMR Eco & Sols 210, F-34060 Montpellier 2, France;
2.INAT, Tunis 1082, Tunisia;
3.ESAK, Kef 7119, Tunisia;
4.Fac Sci Tunis, El Manar Tunis 2092, Tunisia
推荐引用方式
GB/T 7714
Hamdi, Salwa,Chevallier, Tiphaine,Ben Aissa, Nadhira,et al. Short-term temperature dependence of heterotrophic soil respiration after one-month of pre-incubation at different temperatures[C]:PERGAMON-ELSEVIER SCIENCE LTD,2011:1752-1758.
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