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Experimental warming increased soil nitrogen sink in the Tibetan permafrost
Chang, Ruiying; Wang, Genxu; Yang, Yuanhe1; Chen, Xiaopeng
2017
发表期刊JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
ISSN2169-8953
卷号122期号:7页码:1870-1879
摘要In permafrost soil, warming regulates the nitrogen (N) cycle either by stimulating N transformation or by enhancing cryoturbation, the mixture of soil layers due to repeated freeze thaw. Here N isotopic values (N-15) of plants and the soil were investigated in a 7year warming experiment in a permafrost-affected alpine meadow on the Qinghai-Tibetan Plateau. The results revealed that warming significantly decreased the N-15 in the plant (aboveground and belowground parts) and different soil fractions (clay and silt fraction, aggregate, and bulk soil). The decreased soil N-15 was associated with an increase in soil N stock due to greater N fixation. The incremental N retention in plants and soil mineral-associated fractions from warming resulted in a decrease in soil inorganic N, which constrains the role of nitrification/denitrification in soil N-15, suggesting a restrained rather than an open N cycle. Furthermore, enhanced cryoturbation under warming, identified by a downward redistribution of Cs-137 into deeper layers, promoted N protection from transformation. Overall, the decrease in soil N-15 indicated higher rates of N input through fixation relative to N loss through nitrification and denitrification in permafrost-affected ecosystems under warming conditions.
关键词nitrogen isotope permafrost soil cryoturbation openness of N cycle soil aggregate Qinghai-Tibetan Plateau
学科领域Science & Technology - Other Topics
DOI10.1038/s41467-017-02034-w
收录类别SCI
语种英语
WOS关键词LITTER ADDITION ; ORGANIC-CARBON ; ALPINE MEADOW ; ECOSYSTEM ; FIXATION ; TUNDRA ; METAANALYSIS ; RESPONSES ; PLATEAU ; FLUXES
WOS记录号WOS:000417467100006
出版者AMER GEOPHYSICAL UNION
文献子类Article
出版地WASHINGTON
EISSN2169-8961
资助机构National Basic Research Program of ChinaNational Basic Research Program of China [2013CBA01807] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41671206, 91547203]
作者邮箱wanggx@imde.ac.cn
作品OA属性gold, Green Published
引用统计
被引频次:19[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ibcas.ac.cn/handle/2S10CLM1/22064
专题植被与环境变化国家重点实验室
作者单位1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Environm Evolvement & Regulat, Chengdu, Sichuan, Peoples R China
2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China
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GB/T 7714
Chang, Ruiying,Wang, Genxu,Yang, Yuanhe,et al. Experimental warming increased soil nitrogen sink in the Tibetan permafrost[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2017,122(7):1870-1879.
APA Chang, Ruiying,Wang, Genxu,Yang, Yuanhe,&Chen, Xiaopeng.(2017).Experimental warming increased soil nitrogen sink in the Tibetan permafrost.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,122(7),1870-1879.
MLA Chang, Ruiying,et al."Experimental warming increased soil nitrogen sink in the Tibetan permafrost".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 122.7(2017):1870-1879.
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