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Enhanced CO2 uptake is marginally offset by altered fluxes of non-CO2 greenhouse gases in global forests and grasslands under N deposition

文献类型：期刊论文

作者Xiao, Shuqi4; Wang, Chao4; Yu, Kai4; Liu, Genyuan4; Wu, Shuang1,4; Wang, Jinyang1,4; Niu, Shuli5; Zou, Jianwen1,2,4; Liu, Shuwei1,2,3,4
刊名GLOBAL CHANGE BIOLOGY
出版日期2023-07-24
页码21
关键词carbon pool climate change greenhouse gas nitrogen deposition nitrogen pool
ISSN号1354-1013
DOI10.1111/gcb.16869
通讯作者Liu, Shuwei(swliu@njau.edu.cn)
英文摘要Despite the increasing impact of atmospheric nitrogen (N) deposition on terrestrial greenhouse gas (GHG) budget, through driving both the net atmospheric CO2 exchange and the emission or uptake of non-CO2 GHGs (CH4 and N2O), few studies have assessed the climatic impact of forests and grasslands under N deposition globally based on different bottom-up approaches. Here, we quantify the effects of N deposition on biomass C increment, soil organic C (SOC), CH4 and N2O fluxes and, ultimately, the net ecosystem GHG balance of forests and grasslands using a global comprehensive dataset. We showed that N addition significantly increased plant C uptake (net primary production) in forests and grasslands, to a larger extent for the aboveground C (aboveground net primary production), whereas it only caused a small or insignificant enhancement of SOC pool in both upland systems. Nitrogen addition had no significant effect on soil heterotrophic respiration (R-H) in both forests and grasslands, while a significant N-induced increase in soil CO2 fluxes (R-S, soil respiration) was observed in grasslands. Nitrogen addition significantly stimulated soil N2O fluxes in forests (76%), to a larger extent in grasslands (87%), but showed a consistent trend to decrease soil uptake of CH4, suggesting a declined sink capacity of forests and grasslands for atmospheric CH4 under N enrichment. Overall, the net GHG balance estimated by the net ecosystem production-based method (forest, 1.28 Pg CO2-eq year(-1) vs. grassland, 0.58 Pg CO2-eq year(-1)) was greater than those estimated using the SOC-based method (forest, 0.32 Pg CO2-eq year(-1) vs. grassland, 0.18 Pg CO2-eq year(-1)) caused by N addition. Our findings revealed that the enhanced soil C sequestration by N addition in global forests and grasslands could be only marginally offset (1.5%-4.8%) by the combined effects of its stimulation of N2O emissions together with the reduced soil uptake of CH4.
WOS关键词NITROUS-OXIDE EMISSIONS ; SOIL CARBON-DIOXIDE ; TEMPERATE SEMIARID GRASSLAND ; KOREAN PINE PLANTATION ; NET PRIMARY PRODUCTION ; SHORT-TERM RESPONSES ; METHANE UPTAKE ; ALPINE MEADOW ; INNER-MONGOLIA ; N2O EMISSION
资助项目National Key Research and Development Program of China[2022YFD1901600] ; Technology Innovation Special Fund of Jiangsu Province for Carbon Dioxide Emission Peaking and Carbon Neutrality[SBE2022350046] ; Natural Science Foundation of Jiangsu Province for Distinguished Young Scholars[BK20200024] ; National Natural Science Foundation of China[42077080]
WOS研究方向Biodiversity & Conservation ; Environmental Sciences & Ecology
语种英语
WOS记录号WOS:001034823800001
出版者WILEY
资助机构National Key Research and Development Program of China ; Technology Innovation Special Fund of Jiangsu Province for Carbon Dioxide Emission Peaking and Carbon Neutrality ; Natural Science Foundation of Jiangsu Province for Distinguished Young Scholars ; National Natural Science Foundation of China
源URL[http://ir.igsnrr.ac.cn/handle/311030/195636]  
专题中国科学院地理科学与资源研究所
通讯作者Liu, Shuwei
作者单位1.Nanjing Agr Univ, Coll Resources & Environm Sci, Key Lab Low Carbon & Green Agr Southeastern China, Minist Agr & Rural Affairs, Nanjing, Peoples R China
2.Nanjing Agr Univ, Jiangsu Key Lab & Engn Ctr Solid Organ Waste Utili, Jiangsu Collaborat Innovat Ctr Solid Organ Waste R, Nanjing, Peoples R China
3.Nanjing Agr Univ, Jiangsu Key Lab Low Carbon Agr & GHGs Mitigat, Nanjing, Peoples R China
4.Jiangsu Key Lab Low Carbon Agr & GHGs Mitigat, Nanjing, Peoples R China
5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Xiao, Shuqi,Wang, Chao,Yu, Kai,et al. Enhanced CO2 uptake is marginally offset by altered fluxes of non-CO2 greenhouse gases in global forests and grasslands under N deposition[J]. GLOBAL CHANGE BIOLOGY,2023:21.
APA Xiao, Shuqi.,Wang, Chao.,Yu, Kai.,Liu, Genyuan.,Wu, Shuang.,...&Liu, Shuwei.(2023).Enhanced CO2 uptake is marginally offset by altered fluxes of non-CO2 greenhouse gases in global forests and grasslands under N deposition.GLOBAL CHANGE BIOLOGY,21.
MLA Xiao, Shuqi,et al."Enhanced CO2 uptake is marginally offset by altered fluxes of non-CO2 greenhouse gases in global forests and grasslands under N deposition".GLOBAL CHANGE BIOLOGY (2023):21.

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来源：地理科学与资源研究所

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