Pulse Effect of Precipitation: Spatial Patterns and Mechanisms of Soil Carbon Emissions
文献类型：期刊论文
| 作者 | Jiang, Zhaoxia2; Bian, Hongfeng2; Xu, Li3; Li, Mingxu3; He, Nianpeng1,3,4 |
| 刊名 | FRONTIERS IN ECOLOGY AND EVOLUTION
 |
| 出版日期 | 2021-05-26 |
| 卷号 | 9页码:12 |
| 关键词 | carbon cycle soil organic matter decomposition precipitation gradient pulse effect grassland |
| ISSN号 | 2296-701X |
| DOI | 10.3389/fevo.2021.673310 |
| 通讯作者 | Bian, Hongfeng(bianhf108@nenu.edu.cn) ; He, Nianpeng(henp@igsnrr.ac.cn) |
| 英文摘要 | The rapid and strong release of CO2 caused by precipitation (known as the pulse effect) is a common phenomenon that significantly affects ecosystem C cycling. However, the degree to which the pulse effect occurs overlarge regional scales remains unclear. In this study, we conducted continuous and high-frequency measurements of soil CO2 release rates (R-s) for 48 h after simulated precipitation, along a precipitation gradient of different grassland types (i.e., meadow, typical, and desert) in Inner Mongolia, China. Pulse effects were assessed using the maximum R-s (Rsoil-max) and accumulated CO2 emissions (A(Rs-soil)). Strong precipitation pulse effects were found in all sites; however, the effects differed among grassland types. In addition, an apparent decrease in both Rsoil-max and A(Rs-soil) was observed from the east to west, i.e., along the decreasing precipitation gradient. A(Rs-soil) values followed the order: temperate meadow grassland (0.097 mg C g(-1) soil) > typical temperate grassland (0.081 mg C g(-1) soil) > temperate desert grassland (0.040 mg C g(-1) soil). Furthermore, Rsoil-max and A(Rs-soil) were significantly positively correlated with soil quality (SOC, POC, and N, etc.; P < 0.01). A(Rs-soil) (P < 0.05) and A(Rs-SOC) (P < 0.01) were significantly affected. A(Rs-soil) and A(Rs-SOC) were also positively correlated with soil microbial biomass significantly (P < 0.05). Rsoil-max and A(Rs-soil) had similar spatial variations and controlling mechanisms. These results greatly support the substrate supply hypothesis for the effects of precipitation pulses, and provide valuable information for predicting CO2 emissions. Our findings also verified the significant effect of soil CO2 release from precipitation pulses on the grasslands of arid and semi-arid regions. Our data provide a scientific basis for model simulations to better predict the responses of ecosystem carbon cycles in arid and semi-arid regions under predicted climate change scenarios. |
| WOS关键词 | ORGANIC-MATTER DECOMPOSITION ; MICROBIAL RESPIRATION ; TEMPERATURE SENSITIVITY ; N-MINERALIZATION ; CO2 FLUX ; GRASSLAND ; RESPONSES ; COMMUNITIES ; GRADIENT ; DROUGHT |
| 资助项目 | National Natural Science Foundation of China[31988102] ; National Natural Science Foundation of China[31870437] ; second Tibetan Plateau Scientific Expedition and Research Program (STEP)[2019QZKK060602] ; Chinese Academy of Sciences Strategic Priority Research Program[XDA23080401] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000659092500001 |
| 出版者 | FRONTIERS MEDIA SA |
| 资助机构 | National Natural Science Foundation of China ; second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Chinese Academy of Sciences Strategic Priority Research Program |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/163963]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Bian, Hongfeng; He, Nianpeng |
| 作者单位 | 1.Northeast Normal Univ, Inst Grassland Sci, Minist Educ, Key Lab Vegetat Ecol, Changchun, Peoples R China 2.Northeast Normal Univ, State Environm Protect Key Lab Wetland Ecol & Veg, Sch Environm, Changchun, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China 4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jiang, Zhaoxia,Bian, Hongfeng,Xu, Li,et al. Pulse Effect of Precipitation: Spatial Patterns and Mechanisms of Soil Carbon Emissions[J]. FRONTIERS IN ECOLOGY AND EVOLUTION,2021,9:12. |
| APA | Jiang, Zhaoxia,Bian, Hongfeng,Xu, Li,Li, Mingxu,&He, Nianpeng.(2021).Pulse Effect of Precipitation: Spatial Patterns and Mechanisms of Soil Carbon Emissions.FRONTIERS IN ECOLOGY AND EVOLUTION,9,12. |
| MLA | Jiang, Zhaoxia,et al."Pulse Effect of Precipitation: Spatial Patterns and Mechanisms of Soil Carbon Emissions".FRONTIERS IN ECOLOGY AND EVOLUTION 9(2021):12. |
入库方式： OAI收割
来源：地理科学与资源研究所
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