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Interactive global change factors mitigate soil aggregation and carbon change in a semi-arid grassland

文献类型：期刊论文

作者Bai, Tongshuo2; Wang, Peng2; Hall, Steven J.1; Wang, Fuwei2; Ye, Chenglong2; Li, Zhen2; Li, Shijie2; Zhou, Luyao2; Qiu, Yunpeng2; Guo, Jiuxin2,3
刊名GLOBAL CHANGE BIOLOGY
出版日期2020-07-07
页码13
关键词aggregate stability carbonate global change mineral-associated C N-induced acidification soil respiration
ISSN号1354-1013
DOI10.1111/gcb.15220
通讯作者Wang, Yi(wangyi@ieecas.cn) ; Hu, Shuijin(shuijin_hu@hotmail.com)
英文摘要The ongoing global change is multi-faceted, but the interactive effects of multiple drivers on the persistence of soil carbon (C) are poorly understood. We examined the effects of warming, reactive nitrogen (N) inputs (12 g N m(-2) year(-1)) and altered precipitation (+ or - 30% ambient) on soil aggregates and mineral-associated C in a 4 year manipulation experiment with a semi-arid grassland on China's Loess Plateau. Our results showed that in the absence of N inputs, precipitation additions significantly enhanced soil aggregation and promoted the coupling between aggregation and both soil fungal biomass and exchangeable Mg2+. However, N inputs negated the promotional effects of increased precipitation, mainly through suppressing fungal growth and altering soil pH and clay-Mg2+-OC bridging. Warming increased C content in the mineral-associated fraction, likely by increasing inputs of root-derived C, and reducing turnover of existing mineral-associated C due to suppression of fungal growth and soil respiration. Together, our results provide new insights into the potential mechanisms through which multiple global change factors control soil C persistence in arid and semi-arid grasslands. These findings suggest that the interactive effects among global change factors should be incorporated to predict the soil C dynamics under future global change scenarios.
WOS关键词ARBUSCULAR MYCORRHIZAL FUNGI ; ORGANIC-MATTER ; NITROGEN DEPOSITION ; CLIMATE-CHANGE ; ELEVATED CO2 ; RESPIRATION ; RESPONSES ; WATER ; DECOMPOSITION ; IMPACTS
资助项目National Key R&D Program of China[2017YFC0503902] ; National Natural Science Foundation of China[41671269]
WOS研究方向Biodiversity & Conservation ; Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000545786100001
出版者WILEY
资助机构National Key R&D Program of China ; National Natural Science Foundation of China
源URL[http://ir.ieecas.cn/handle/361006/15013]  
专题地球环境研究所_生态环境研究室
通讯作者Wang, Yi; Hu, Shuijin
作者单位1.Iowa State Univ, Dept Ecol Evolut & Organismal Biol, Ames, IA USA
2.Nanjing Agr Univ, Coll Resources & Environm Sci, Ecosyst Ecol Lab, Nanjing 210095, Peoples R China
3.Fujian Agr & Forestry Univ, Coll Resources & Environm, Int Magnesium Inst, Fuzhou, Peoples R China
4.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China
5.North Carolina State Univ, Dept Entomol & Plant Pathol, Raleigh, NC USA
推荐引用方式
GB/T 7714		 Bai, Tongshuo,Wang, Peng,Hall, Steven J.,et al. Interactive global change factors mitigate soil aggregation and carbon change in a semi-arid grassland[J]. GLOBAL CHANGE BIOLOGY,2020:13.
APA Bai, Tongshuo.,Wang, Peng.,Hall, Steven J..,Wang, Fuwei.,Ye, Chenglong.,...&Hu, Shuijin.(2020).Interactive global change factors mitigate soil aggregation and carbon change in a semi-arid grassland.GLOBAL CHANGE BIOLOGY,13.
MLA Bai, Tongshuo,et al."Interactive global change factors mitigate soil aggregation and carbon change in a semi-arid grassland".GLOBAL CHANGE BIOLOGY (2020):13.

入库方式： OAI收割

来源：地球环境研究所

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