IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Experimental warming increased soil nitrogen sink in the Tibetan permafrost
Chang, Ruiying1; Wang, Genxu1; Yang, Yuanhe2; Chen, Xiaopeng1
2017
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
ISSN2169-8953
EISSN2169-8961
Volume122Issue:7Pages:1870-1879
SubtypeArticle
AbstractIn 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.
KeywordNitrogen Isotope Permafrost Soil Cryoturbation Openness Of n Cycle Soil Aggregate Qinghai-tibetan Plateau
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine ; Physical Sciences
DOI10.1002/2017JG003827
WOS Subject ExtendedEnvironmental Sciences & Ecology ; Geology
Indexed BySCI
WOS KeywordPOWER-PLANT ACCIDENT ; FOREST SOIL ; ALPINE MEADOW ; THAWING PERMAFROST ; LITTER ADDITION ; GRASSLAND SOILS ; ORGANIC-CARBON ; CLIMATE-CHANGE ; PLATEAU ; ECOSYSTEM
Language英语
Quartile2区
TOP
WOS SubjectEnvironmental Sciences ; Geosciences, Multidisciplinary
WOS IDWOS:000407860500020
Funding OrganizationNational Basic Research Program of China(2013CBA01807) ; National Natural Science Foundation of China(41671206 ; 91547203)
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/19029
Collection山地表生过程与生态调控重点实验室
Corresponding AuthorWang, Genxu
Affiliation1.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
Recommended Citation
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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