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Simulated rain addition modifies diurnal patterns and temperature sensitivities of autotrophic and heterotrophic soil respiration in an arid desert ecosystem

文献类型：期刊论文

作者Song, Weimin2,5; Chen, Shiping; Wu, Bo1; Zhu, Yajuan1; Zhou, Yadan; Lu, Qi1; Lin, Guanghui3
刊名SOIL BIOLOGY & BIOCHEMISTRY
出版日期2015
卷号82页码:143-152
ISSN号0038-0717
关键词Soil CO2 efflux Precipitation change Soil moisture Heterotrophic respiration Autotrophic respiration Q(10)
DOI10.1016/j.soilbio.2014.12.020
文献子类Article
英文摘要The timing and magnitude of rainfall events in arid and semiarid regions are expected to change dramatically in future decades, which will likely greatly affect regional carbon cycles. To understand how increases in rainfall affect the diurnal patterns and temperature sensitivities (Q(10)) of soil respiration (R-S) and its key components (i.e. heterotrophic respiration (R-H) and autotrophic respiration (R-A)), we conducted a manipulative field experiment in a desert ecosystem of Northwest China. We simulated five different scenarios of future rain regimes (0%, 25%, 50%, 75% and 100% increase over local annual mean precipitation) each month from May to September in 2009. We measured R-S and R-H every three hours on 6 and 16 days after the rain addition, and estimated R-A by calculating the difference between R-S and R-H. We found that rain addition significantly increased the daily mean R-S and its components on the two measurement days during the growing season. However, the diurnal pattern was different between the two respiration components. Rain addition significantly increased the daily Q(10) value of R-H but suppressed that of R-A on Day 6. Rain addition had no influence on daily Q(10) value of both respiration components on Day 16 when soil moisture was lower. In addition, we observed significantly higher daily Q(10) of R-H than R-A under all five rain addition treatments, indicating that microbial respiration is more temperature sensitive than root respiration in a short-time scale in this desert ecosystem. Thus, partitioning soil respiration into its two components, and analyzing the differential responses of R-H and R-A to future climate changes should be considered for more accurate predictions of soil respiration and regional carbon cycle in these arid and semiarid regions. (c) 2015 Elsevier Ltd. All rights reserved.
学科主题Soil Science
出版地OXFORD
WOS关键词CARBON-DIOXIDE FLUXES ; PRECIPITATION PULSES ; CO2 EFFLUX ; VERTICAL-DISTRIBUTION ; MICROBIAL BIOMASS ; WATER CONTENT ; DIFFERENTIAL RESPONSES ; SEASONAL-VARIATIONS ; ROOT RESPIRATION ; INNER-MONGOLIA
WOS研究方向Science Citation Index Expanded (SCI-EXPANDED)
语种英语
出版者PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号WOS:000351321200019
资助机构Science and Technologies Foundation of the Chinese Academy of Forestry [CAFYBB2007008] ; 973 program of Ministry of Science and Technology, China [2013CB956601] ; Strategic Priority Research Program of the Chinese Academy of Sciences, Climate Change: Carbon Budget and Relevant Issues [XDA05050402] ; National Natural Science Foundation of China [31170453] ; Selected Young Scientist Program of the State Key Laboratory of Vegetation and Environment Change
源URL[http://ir.ibcas.ac.cn/handle/2S10CLM1/25622]  
专题植被与环境变化国家重点实验室
作者单位1.Peking Univ, Minist Educ, Key Lab Earth Surface Proc, Beijing 100871, Peoples R China
2.Peking Univ, Dept Ecol, Coll Urban & Environm Sci, Beijing 100871, Peoples R China
3.Chinese Acad Forestry, Inst Desertificat Studies, Beijing 100091, Peoples R China
4.Tsinghua Univ, Ctr Earth Syst Sci, Key Lab Earth Syst Modeling, Minist Educ, Beijing 100084, Peoples R China
5.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
推荐引用方式
GB/T 7714		 Song, Weimin,Chen, Shiping,Wu, Bo,et al. Simulated rain addition modifies diurnal patterns and temperature sensitivities of autotrophic and heterotrophic soil respiration in an arid desert ecosystem[J]. SOIL BIOLOGY & BIOCHEMISTRY,2015,82:143-152.
APA Song, Weimin.,Chen, Shiping.,Wu, Bo.,Zhu, Yajuan.,Zhou, Yadan.,...&Lin, Guanghui.(2015).Simulated rain addition modifies diurnal patterns and temperature sensitivities of autotrophic and heterotrophic soil respiration in an arid desert ecosystem.SOIL BIOLOGY & BIOCHEMISTRY,82,143-152.
MLA Song, Weimin,et al."Simulated rain addition modifies diurnal patterns and temperature sensitivities of autotrophic and heterotrophic soil respiration in an arid desert ecosystem".SOIL BIOLOGY & BIOCHEMISTRY 82(2015):143-152.

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来源：植物研究所

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