Contrasting responses after fires of the source components of soil respiration and ecosystem respiration
文献类型： 外文期刊
作者： Chen, Ji 2 ; Zhang, Yuefang 5 ; Luo, Yiqi 6 ; Zhou, Xuhui 9 ; Jiang, Yu 11 ; Zhao, Jin 4 ; Chen, Yizhao 12 ; Wang, Chao 3 ; Gu 1 ;
作者机构： 1.Chinese Acad Sci, Inst Earth Environm, SKLLQG, Xian 710061, Shaanxi, Peoples R China
2.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian 710061, Shaanxi, Peoples R China
3.Northwestern Polytech Univ, Ctr Ecol & Environm Sci, Key Lab Space Biosci & Biotechnol, Xian 710072, Shaanxi, Peoples R China
4.Aarhus Univ, Ctr Circular Bioecon, Dept Agroecol, Tjele, Denmark
5.Jiangsu Acad Agr Sci, Circular Agr Res Ctr, Nanjing, Jiangsu, Peoples R China
6.No Arizona Univ, Dept Biol Sci, Ctr Ecosyst Sci & Soc, Box 5640, Flagstaff, AZ 86011 USA
7.No Arizona Univ, Dept Biol Sci, Box 5640, Flagstaff, AZ 86011 USA
8.Tsinghua Univ, Dept Earth Syst Sci, Beijing, Peoples R China
9.East China Normal Univ, Sch Ecol & Environm Sci, Tiantong Natl Field Observat Stn Forest Ecosyst, Shanghai, Peoples R China
10.East China Normal Univ, Ctr Global Change & Ecol Forecasting, Shanghai, Peoples R China
11.Chinese Acad Agr Sci, Inst Crop Sci, Beijing, Peoples R China
12.Nanjing Forestry Univ, Coll Biol & Environm, Joint Innovat Ctr Modern Forestry Studies, Nanjing, Jiangsu, Peoples R China
13.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
14.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian, Shaanxi, Peoples R China
关键词： autotrophic respiration; ecosystem respiration; fire disturbance; heterotrophic respiration; microbial biomass; plant functional types; plant productivity; soil respiration
期刊名称：EUROPEAN JOURNAL OF SOIL SCIENCE （ 影响因子：4.949； 五年影响因子：4.626 ）
ISSN： 1351-0754
年卷期： 2019 年 70 卷 3 期
页码：
收录情况： SCI
摘要： Wildfire is an important ecological disturbance that can have cascading effects on ecosystem carbon (C) fluxes. Ecosystem respiration (ER) and soil respiration (SR) account for two of the largest terrestrial C fluxes to the atmosphere, and they play critical roles in regulating C-climate feedbacks. Here, the responses of ER, SR and their source components to experimental burning in a meadow grassland on the Tibetan Plateau were investigated. Fire treatment increased ER by 9% but decreased SR by 15%. The contrasting post-fire responses of SR and ER can be explained by the behaviour of their source components; that is, fire increased aboveground plant respiration (R-agb) by 37%, but decreased heterotrophic respiration (HR) by 21%. Increases in ER and R-agb were mainly related to enhanced plant productivity, whereas smaller SR and HR were associated with reductions in microbial biomass and soil moisture. Accounting for the responses of ER, SR and their intrinsic components has advanced our understanding of how fire affects ecosystem C fluxes.
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