Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/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 |
ISSN | 0038-0717 |
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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