Moderate nitrogen enrichment increases CO2 sink strength in a coastal wetland
文献类型：期刊论文
| 作者 | Qu, Wendi4,5; Han, Guangxuan3,4; Penuelas, Josep1,2; Wang, Xiaoyue4,5; Xie, Baohua3,4 |
| 刊名 | ENVIRONMENTAL RESEARCH LETTERS
 |
| 出版日期 | 2024-08-01 |
| 卷号 | 19期号:8页码:12 |
| 关键词 | nitrogen enrichment coastal wetland CO2 sequestration plant species composition biomass distribution |
| ISSN号 | 1748-9326 |
| DOI | 10.1088/1748-9326/ad64e9 |
| 英文摘要 | Coastal wetlands remarkably influence terrestrial carbon (C) stock by serving as natural reservoirs for 'blue carbon'. Anthropogenic nitrogen (N) enrichment shapes the dynamics of soil and plant communities, consequently affecting the C balance and ecosystem functions. The impacts of various levels of N enrichment on CO2 sequestration in coastal wetlands, however, remain elusive. Here we conducted a long-term field study of N fertilization in a coastal wetland in the Yellow River Delta, China, to investigate N effects on soil properties, indicators of plant dynamics, and fluxes of ecosystem CO2. The results indicated that moderate N enrichment (5 g N m(-2) y(-1)) stimulated C fluxes with increases in gross primary productivity (+26.4%), ecosystem respiration (+23.3%), and net ecosystem exchange (NEE, +31.5%) relative to the control. High (10 g N m(-2) y(-1)) and extreme (20 g N m(-2) y(-1)) amounts of N enrichment, however, had relatively minor impacts on these CO2 fluxes. Overall, we observed a decrease in soil electrical conductivity (-24.6%) and increases in soil organic C (+25.2%) and microbial biomass C (+369.3%) for N enrichment. N enrichment also altered the composition of plant species, with a higher proportion of a local dominant species (Phragmites australis), and affected root biomass distribution, with more biomass near the soil surface. Structural equation modeling explained 65.2% of the variance of NEE and supported the assumption that N enrichment could alter the dynamics of soil properties and plant conditions and accelerate ecosystem CO2 sequestration. These findings have important implications for forecasting the C cycle with increasing N deposition in coastal wetlands, contributing to the projections of the global C budget. |
| WOS关键词 | SOIL ORGANIC-CARBON ; SEQUESTRATION ; DEPOSITION ; TERRESTRIAL ; DECOMPOSITION ; SALINITY ; EXCHANGE ; BIOMASS ; SYSTEMS ; FLUXES |
| 资助项目 | National Key Research and Development Program in China[2022YFF0802104] ; Natural Science Foundation of China[U2106209] ; Natural Science Foundation of China[U1906223] ; Natural Science Foundation of China[42071126] ; Natural Science Foundation of China[42101117] ; International Science Partnership Program of the Chinese Academy of Sciences[121311KYSB20190029] ; Youth Innovation Promotion Association of Chinese Academy of Sciences[2022051] ; Spanish MCIN, AEI[TED2021-132627B-I00] ; European Union Next Generation EU/PRTR ; Fundacion Ramon Areces Grant[CIVP20A6621] |
| WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:001278271800001 |
| 出版者 | IOP Publishing Ltd |
| 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 ; Youth Innovation Promotion Association of Chinese Academy of Sciences ; Spanish MCIN, AEI ; European Union Next Generation EU/PRTR ; Fundacion Ramon Areces Grant |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/207112]  |
| 专题 | 陆地表层格局与模拟院重点实验室_外文论文 |
| 通讯作者 | Wang, Xiaoyue; Xie, Baohua |
| 作者单位 | 1.CREAF CSIC UAB, CSIC, Global Ecol Unit, Barcelona 08913, Catalonia, Spain 2.CREAF Ctr Recerca Ecol & Aplicac Forestals, Barcelona, Catalonia, Spain 3.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc & Ecol Remediat, Yantai 264000, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qu, Wendi,Han, Guangxuan,Penuelas, Josep,et al. Moderate nitrogen enrichment increases CO2 sink strength in a coastal wetland[J]. ENVIRONMENTAL RESEARCH LETTERS,2024,19(8):12. |
| APA | Qu, Wendi,Han, Guangxuan,Penuelas, Josep,Wang, Xiaoyue,&Xie, Baohua.(2024).Moderate nitrogen enrichment increases CO2 sink strength in a coastal wetland.ENVIRONMENTAL RESEARCH LETTERS,19(8),12. |
| MLA | Qu, Wendi,et al."Moderate nitrogen enrichment increases CO2 sink strength in a coastal wetland".ENVIRONMENTAL RESEARCH LETTERS 19.8(2024):12. |
入库方式： OAI收割
来源：地理科学与资源研究所
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