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| Changing precipitation exerts greater influence on soil heterotrophic than autotrophic respiration in a semiarid steppe | |
Zhang, Bingwei1,2; Li, Weijing2; Chen, Shiping ; Tan, Xingru2; Wang, Shanshan2; Chen, Minling3; Ren, Tingting; Xia, Jianyang4; Huang, Jianhui2; Han, Xingguo2
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| 2019 | |
| 发表期刊 | AGRICULTURAL AND FOREST METEOROLOGY
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| ISSN | 0168-1923 |
| 卷号 | 271页码:413-421 |
| 摘要 | Future precipitation change is anticipated to have a profound influence on ecosystem carbon (C) cycling, especially soil respiration, the largest C flux from the terrestrial ecosystem to the atmosphere. Due to different substrate sources and biological processes, the heterotrophic (SRh) and autotrophic (SRa) components of soil respiration (SRtot) may respond to changing precipitation in different ways. Determining the differential responses of SRh and SRa to precipitation will facilitate our evaluation of soil C storage and stability under future precipitation change. Here, a 3-year precipitation manipulation experiment with 5 levels of precipitation (+/- 60%, +/- 30% and ambient growing season precipitation) was conducted in a semiarid steppe to determine the influence of precipitation on soil respiration. Results showed that SRtot, increased nonlinearly with increasing water supply, in which, SRh increased much more than SRa. Consequently, the ratio of SRh to SRtot, was enhanced significantly with increasing precipitation, i.e., from 41% to 62% as precipitation increased from 122 mm to 408 mm. Structural equation modeling analysis indicated that changes in SR h and SR C were predominated by the soil water content (SWC) and plant growth, respectively. The stronger effects exerted by changes in precipitation on SWC compared with plant growth contributed to the greater change in SR h than in SRa. Additionally, SRa exhibited a higher temperature sensitivity than SRh. Thus, the increased soil temperature in the drought treatments had greater influence on SRa than SRh, and greatly offset the influence of drought stress on SRa, leading to the smaller change in SRa compared with SRh. Our study highlights the different responses of the two soil respiration components to changing precipitation. These results indicate that future increases in precipitation in semiarid regions will increase soil heterotrophic respiration which may accelerate the turnover of soil C, and further affect the stability of soil C stock. |
| 关键词 | Change in precipitation Responses sensitivity Soil respiration components Semiarid steppe |
| 学科领域 | Agronomy ; Forestry ; Meteorology & Atmospheric Sciences |
| DOI | 10.1016/j.agrformet.2019.03.019 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS关键词 | ORGANIC-CARBON DOC ; CO2 EFFLUX ; DIFFERENTIAL RESPONSES ; EXPERIMENTAL DROUGHT ; ECOSYSTEM CARBON ; CLIMATE-CHANGE ; WATER ; TEMPERATURE ; SENSITIVITY ; COMPONENTS |
| WOS研究方向 | Agriculture ; Forestry ; Meteorology & Atmospheric Sciences |
| WOS记录号 | WOS:000468709200037 |
| 出版者 | ELSEVIER |
| 文献子类 | Article |
| 出版地 | AMSTERDAM |
| EISSN | 1873-2240 |
| 资助机构 | National Key Research and Development Program of China [2017YFA0604801, 2016YFC0500700] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41773084, 31700375] |
| 作者邮箱 | spchen@ibcas.ac.cn |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ibcas.ac.cn/handle/2S10CLM1/19638 |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.Sun Yat Sen Univ, Sch Life Sci, Departrrzent Ecol, Guangzhou 510275, Guangdong, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Jinan Univ, Coll Chinese Language & Culture, Guangzhou 510610, Guangdong, Peoples R China 5.East China Normal Univ, Sch Ecol & Environm Sci, Res Ctr Global Change & Ecol Forecasting, Shanghai 200062, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Bingwei,Li, Weijing,Chen, Shiping,et al. Changing precipitation exerts greater influence on soil heterotrophic than autotrophic respiration in a semiarid steppe[J]. AGRICULTURAL AND FOREST METEOROLOGY,2019,271:413-421. |
| APA | Zhang, Bingwei.,Li, Weijing.,Chen, Shiping.,Tan, Xingru.,Wang, Shanshan.,...&Han, Xingguo.(2019).Changing precipitation exerts greater influence on soil heterotrophic than autotrophic respiration in a semiarid steppe.AGRICULTURAL AND FOREST METEOROLOGY,271,413-421. |
| MLA | Zhang, Bingwei,et al."Changing precipitation exerts greater influence on soil heterotrophic than autotrophic respiration in a semiarid steppe".AGRICULTURAL AND FOREST METEOROLOGY 271(2019):413-421. |
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