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Soil CO2 not CH4 flux determines soil carbon emission response to seasonal precipitation variation in a brackish wetland

文献类型：期刊论文

作者Zhang, Huiqi2,3,4; Han, Guangxuan3,4; Jia, Wenli2,3,4; Huang, Wanxin3,4,5; Zhang, Xiaoshuai3,4; Wang, Xiaojie3,4; Zhao, Mingliang3,4; Xie, Baohua3,4; Lu, Feng6; Song, Jianbin6
刊名JOURNAL OF PLANT ECOLOGY
出版日期2026-02-01
卷号19期号:1页码:17
关键词seasonal precipitation distribution soil CO2 fluxes soil salinity fine root biomass brackish wetland
ISSN号1752-9921
DOI10.1093/jpe/rtaf138
通讯作者Chu, Xiaojing(xjchu@yic.ac.cn)
英文摘要Global climate change-induced alterations in precipitation patterns have introduced uncertainty regarding soil carbon sequestration capacity in brackish wetlands. To investigate the effect of seasonal precipitation distribution (SPD) on soil carbon emissions, we conducted a field experiment in a brackish wetland in the Yellow River Delta, maintaining consistent annual precipitation but varying SPD (+73%, +56%, CK, -56%, and -73%). Increased precipitation during the spring was followed by decreased precipitation in the summer and fall (+73% and +56%), whereas decreased spring precipitation was followed by increased summer and fall precipitation (-56% and -73%). Precipitation remained consistent across all treatments during winter. The results revealed significant seasonal and inter-annual sensitivity of soil CO2 fluxes to SPD, with the spring precipitation enhancement (+56%) treatment exerting a greater influence on emissions than the +73% treatment. In contrast, soil CH4 fluxes exhibited no statistically significant variations across seasons or in response to precipitation adjustments. Furthermore, hydrological mediation of SPD established inverse water-salt dynamics: increased precipitation in spring mitigated soil salinity, promoting vegetation colonization and growth, while reduced precipitation in summer and autumn alleviated inundation pressure, enhancing vegetation productivity. Increases in soil CO2 fluxes driven by SPD were primarily attributed to alleviation of salinity stress and vegetation-mediated carbon partitioning, whereas CH4 fluxes remained statistically constant across precipitation regimes. Therefore, we conclude that SPD predominantly affects soil carbon emissions in the brackish wetland by modifying soil CO2 fluxes. These findings provide mechanistic insights for refining predictive models of wetland carbon cycling under climate-driven precipitation reconstruction.
WOS关键词CLIMATE-CHANGE ; VARIABILITY ; RESPIRATION ; COMMUNITIES ; MOISTURE
WOS研究方向Plant Sciences ; Environmental Sciences & Ecology ; Forestry
语种英语
WOS记录号WOS:001688910000001
资助机构National Key Research and Development Program in China ; Natural Science Foundation of China ; International Science Partnership Program of the Chinese Academy of Sciences ; Natural Science Foundation of Shandong Province
源URL[http://ir.yic.ac.cn/handle/133337/42128]  
专题烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室
通讯作者Chu, Xiaojing
作者单位1.Yantai Univ, Sch Environm & Mat Engn, Yantai 264005, Peoples R China
2.Liaocheng Univ, Sch Geog & Environm, Liaocheng 252000, Peoples R China
3.Chinese Acad Sci, CAS Key Lab Coastal Environm Proc & Ecol Remediat, Shandong Key Lab Coastal Environm Proc, Yantai Inst Coastal Zone Res YIC,YICCAS, Yantai 264003, Peoples R China
4.Chinese Acad Sci, Yellow River Delta Field Observat & Res Stn Coasta, Dongying 257000, Peoples R China
5.Hainan Univ, Sch Ecol, Haikou 570228, Peoples R China
6.Adm Bur Yellow River Delta Natl Nat Reserve, Dongying 257091, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Huiqi,Han, Guangxuan,Jia, Wenli,et al. Soil CO2 not CH4 flux determines soil carbon emission response to seasonal precipitation variation in a brackish wetland[J]. JOURNAL OF PLANT ECOLOGY,2026,19(1):17.
APA Zhang, Huiqi.,Han, Guangxuan.,Jia, Wenli.,Huang, Wanxin.,Zhang, Xiaoshuai.,...&Chu, Xiaojing.(2026).Soil CO2 not CH4 flux determines soil carbon emission response to seasonal precipitation variation in a brackish wetland.JOURNAL OF PLANT ECOLOGY,19(1),17.
MLA Zhang, Huiqi,et al."Soil CO2 not CH4 flux determines soil carbon emission response to seasonal precipitation variation in a brackish wetland".JOURNAL OF PLANT ECOLOGY 19.1(2026):17.

入库方式： OAI收割

来源：烟台海岸带研究所

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