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Long-term nitrogen enrichment accelerates soil respiration by boosting microbial biomass in coastal wetlands

文献类型：期刊论文

作者Qu, Wendi1,2; Xie, Baohua2,3; Hua, Hao1,2; Bohrer, Gil4; Penuelas, Josep5,6; Wu, Chaoyang1,2; Han, Guangxuan2,3
刊名SOIL BIOLOGY & BIOCHEMISTRY
出版日期2022-12-01
卷号175页码:7
关键词Nitrogen enrichment Coastal wetlands Soil respiration Microbial biomass carbon Temperature sensitivity
ISSN号0038-0717
DOI10.1016/j.soilbio.2022.108864
通讯作者Wu, Chaoyang(wucy@igsnrr.ac.cn) ; Han, Guangxuan(gxhan@yic.ac.cn)
英文摘要Coastal wetlands are essential in terrestrial carbon balance because they act as natural "blue carbon" sinks, influenced by anthropogenic nitrogen (N) enrichment. N enrichment alters soil environment and plant growth, impacting carbon loss through soil respiration (Rsoil). However, the responses of Rsoil to N enrichment remain elusive in coastal wetlands, hindering the estimation of carbon fluxes. To bridge this knowledge gap, we used an 8-year field N fertilization platform in the coastal wetlands of the Yellow River Delta, China, to measure Rsoil composed of heterotrophic respiration and autotrophic respiration, and multiple indicators of soil properties, microbial activities, and plant growth. We found long-term N enrichment increased Rsoil by 26.6 +/- 1.2% (mean +/- standard deviation) and quadrupled microbial biomass carbon, accounting for 26.9 +/- 1.2% of the increase in heterotrophic respiration. In addition, N enrichment boosted plant growth, increasing the above-ground biomass by 28.7 +/- 6.9% while inducing a cooling effect that partly offsets the increase in autotrophic respiration. In particular, N enrichment elevated soil temperature sensitivity of Rsoil with the increase of N levels, suggesting that the nutrient-related control of Rsoil responds to warming. The study indicates that N enrichment stimulates Rsoil in coastal wetlands by boosting microbial biomass carbon through interactions between soil environmental conditions and plant growth. These results have implications for predicting the carbon cycle with anthropogenic N enrichment.
WOS关键词TROPICAL FOREST ; DEPOSITION ; CARBON ; COMMUNITY ; ADDITIONS ; GROWTH
资助项目Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; International Science Partnership Program of the Chinese Academy of Sciences ; [U2106209] ; [42071126] ; [42101117] ; [XDA23050202] ; [121311KYSB20190029]
WOS研究方向Agriculture
语种英语
WOS记录号WOS:000884832900001
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; International Science Partnership Program of the Chinese Academy of Sciences
源URL[http://ir.igsnrr.ac.cn/handle/311030/187190]  
专题中国科学院地理科学与资源研究所
通讯作者Wu, Chaoyang; Han, Guangxuan
作者单位1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc & Ecol Remediat, Yantai 264000, Peoples R China
4.Ohio State Univ, Dept Civil Environm & Geodet Engn, Columbus, OH USA
5.Ctr Recerca Ecol & Aplicac Forestals, CREAF, Barcelona 08193, Catalonia, Spain
6.UAB, CSIC, CREAF, Global Ecol Unit, Barcelona 08193, Catalonia, Spain
推荐引用方式
GB/T 7714		 Qu, Wendi,Xie, Baohua,Hua, Hao,et al. Long-term nitrogen enrichment accelerates soil respiration by boosting microbial biomass in coastal wetlands[J]. SOIL BIOLOGY & BIOCHEMISTRY,2022,175:7.
APA Qu, Wendi.,Xie, Baohua.,Hua, Hao.,Bohrer, Gil.,Penuelas, Josep.,...&Han, Guangxuan.(2022).Long-term nitrogen enrichment accelerates soil respiration by boosting microbial biomass in coastal wetlands.SOIL BIOLOGY & BIOCHEMISTRY,175,7.
MLA Qu, Wendi,et al."Long-term nitrogen enrichment accelerates soil respiration by boosting microbial biomass in coastal wetlands".SOIL BIOLOGY & BIOCHEMISTRY 175(2022):7.

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来源：地理科学与资源研究所

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