IGSNRR OpenIR
Pulse Effect of Precipitation: Spatial Patterns and Mechanisms of Soil Carbon Emissions
Jiang, Zhaoxia1; Bian, Hongfeng1; Xu, Li2; Li, Mingxu2; He, Nianpeng2,3,4
2021-05-26
Source PublicationFRONTIERS IN ECOLOGY AND EVOLUTION
ISSN2296-701X
Volume9Pages:12
Corresponding AuthorBian, Hongfeng(bianhf108@nenu.edu.cn) ; He, Nianpeng(henp@igsnrr.ac.cn)
AbstractThe 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.
Keywordcarbon cycle soil organic matter decomposition precipitation gradient pulse effect grassland
DOI10.3389/fevo.2021.673310
WOS KeywordORGANIC-MATTER DECOMPOSITION ; MICROBIAL RESPIRATION ; TEMPERATURE SENSITIVITY ; N-MINERALIZATION ; CO2 FLUX ; GRASSLAND ; RESPONSES ; COMMUNITIES ; GRADIENT ; DROUGHT
Indexed BySCI
Language英语
Funding ProjectNational 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]
Funding OrganizationNational Natural Science Foundation of China ; second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Chinese Academy of Sciences Strategic Priority Research Program
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEcology
WOS IDWOS:000659092500001
PublisherFRONTIERS MEDIA SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/163964
Collection中国科学院地理科学与资源研究所
Corresponding AuthorBian, Hongfeng; He, Nianpeng
Affiliation1.Northeast Normal Univ, State Environm Protect Key Lab Wetland Ecol & Veg, Sch Environm, Changchun, Peoples R China
2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China
3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China
4.Northeast Normal Univ, Inst Grassland Sci, Minist Educ, Key Lab Vegetat Ecol, Changchun, Peoples R China
Recommended Citation
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.
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