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Stable oxic-anoxic transitional interface is beneficial to retard soil carbon loss in drained peatland

文献类型：期刊论文

作者Liu, Liangfeng2,3,4; Tian, Jianqing5; Wang, Hongjun6; Xue, Dan2,3,4; Huang, Xinya2,3,4; Wu, Ning2,3; Xu, Xingliang9; Wang, Meng7; Peng, Changhui1; Wang, Yanfen8
刊名SOIL BIOLOGY & BIOCHEMISTRY
出版日期2023-06-01
卷号181页码:12
ISSN号0038-0717
关键词Water table fluctuation Warming Exogenous carbons addition CO2 emission Carbon quality Microbial activity
DOI10.1016/j.soilbio.2023.109024
通讯作者Wu, Ning(wuning@cib.ac.cn) ; Chen, Huai(chenhuai@cib.ac.cn)
英文摘要Peatlands are vital carbon sink globally and have been drained severely. An oxic-anoxic transitional (OAO) interface was created in drained peatlands profile during long-term water table fluctuation. Here, we aimed to investigate how the CO2 release at the OAO interface respond to climate warming and exogenous carbons addition. We found that the carbon at OAO interface was complex, with higher proportion of aromatics, aliphatics and Fe-bound organic carbons. The microbial activity and diversity at OAO interlayer were lowest. Through a lab incubation, we found that the cumulative CO2 emission at OAO interface was 12.36 +/- 1.57 mg CO2 g(-1)C, 117.6% and 36.6% lower than the upper oxic soil (26.89 +/- 1.05 mu g CO2 g(-1)C) and deep anoxic (16.88 +/- 1.56 mu g CO2 g(-1)C) layer, respectively. Moreover, the CO2 emission at the OAO interface was least warming-responsive under anoxic dominated conditions. These results reveal that the OAO interface could work as a buffer to retard drained peatland carbon lose under warming climate. However, the CO2 emission at the OAO interface was extremely sensitive to exogenous carbons, which increased by 53.9%-72.1% after exogenous carbon addition, implying that the buffer capacity of OAO interface will collapse if being exposed to available carbons from plant or soil macromolecular carbons. Our results demonstrated that maintain a stable OAO interface was beneficial to reduce drained peatlands carbon loss, and the priority is to ease the priming effect caused by exogenous carbons.
WOS关键词EXTRACELLULAR ENZYME-ACTIVITY ; ORGANIC-MATTER TURNOVER ; TEMPERATURE SENSITIVITY ; COMMUNITY STRUCTURE ; MICROBIAL BIOMASS ; SUBSTRATE QUALITY ; DECOMPOSITION ; CLIMATE ; MINERALIZATION ; EMISSIONS
资助项目Strategic Priority Research Program of Chinese Academy of Science[XDA200500404] ; Second TI-BETAN Plateau Scientific Expedition[2019QZKK0304] ; Key Research Program of Frontier Sciences, CAS[QYZDB-SSW-DQC007] ; National Natural Science Foundation of China[42101063]
WOS研究方向Agriculture
语种英语
出版者PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号WOS:000984563900001
资助机构Strategic Priority Research Program of Chinese Academy of Science ; Second TI-BETAN Plateau Scientific Expedition ; Key Research Program of Frontier Sciences, CAS ; National Natural Science Foundation of China
源URL[http://ir.igsnrr.ac.cn/handle/311030/197115]  
专题中国科学院地理科学与资源研究所
通讯作者Wu, Ning; Chen, Huai
作者单位1.Univ Quebec Montreal, Inst Environm Sci, Dept Biol Sci, Montreal, PQ, Canada
2.Chinese Acad Sci, Chengdu Inst Biol, CAS Key Lab Mt Ecol Restorat & Bioresource Utiliza, Chengdu 610041, Peoples R China
3.Chinese Acad Sci, Chengdu Inst Biol, Ecol Restorat & Biodivers Conservat Key Lab Sichua, Chengdu 610041, Peoples R China
4.Chinese Acad Sci, Zoige Peatland & Global Change Res Stn, Hongyuan 624400, Peoples R China
5.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
6.Duke Univ, Duke Univ Wetland Ctr, Nicholas Sch Environm, Durham, NC USA
7.Northeast Normal Univ, Sch Geog Sci, Key Lab Geog Proc & Ecol Secur Changbai Mt, Minist Educ, Changchun, Peoples R China
8.Univ Chinese Acad Sci, Beijing 10041, Peoples R China
9.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Liangfeng,Tian, Jianqing,Wang, Hongjun,et al. Stable oxic-anoxic transitional interface is beneficial to retard soil carbon loss in drained peatland[J]. SOIL BIOLOGY & BIOCHEMISTRY,2023,181:12.
APA Liu, Liangfeng.,Tian, Jianqing.,Wang, Hongjun.,Xue, Dan.,Huang, Xinya.,...&Chen, Huai.(2023).Stable oxic-anoxic transitional interface is beneficial to retard soil carbon loss in drained peatland.SOIL BIOLOGY & BIOCHEMISTRY,181,12.
MLA Liu, Liangfeng,et al."Stable oxic-anoxic transitional interface is beneficial to retard soil carbon loss in drained peatland".SOIL BIOLOGY & BIOCHEMISTRY 181(2023):12.

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来源：地理科学与资源研究所

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