IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Non-growing season soil CO2 flux and its contribution to annual soil CO2 emissions in two typical grasslands in the permafrost region of the Qinghai-Tibet Plateau
Zhang, Tao1,2; Wang, Genxu1; Yang, Yan1; Mao, Tianxu1,2; Chen, Xiaopeng1,2
Corresponding AuthorWang, Genxu
2015
Source PublicationEUROPEAN JOURNAL OF SOIL BIOLOGY
ISSN1164-5563
EISSN1778-3615
Volume71Pages:45-52
SubtypeArticle
AbstractNon-growing season soil CO2 emissions are very important part of the annual C balance in the Arctic tundra ecosystems, but very limited information is available for the permafrost region of the Qinghai-Tibet Plateau, which hold great quantities of C. We conducted a full year measurement of soil CO2 flux in an alpine meadow and swamp meadow to quantify seasonal dynamics of non-growing season (include winter and initial thaw and freeze period (TFP)) soil CO2 flux and its contribution to annual soil CO2 emissions. Mean soil CO2 flux was higher in TFP (0.38-0.54 mu mol m(-2) s(-1)) than in winter (0.11-0.23 mu mol m(-2) s(-1)), with significant higher in swamp meadow than alpine meadow in the nongrowing season. Soil temperature explained 76-85% of the yearly variation in the soil CO2 flux, with higher temperature sensitivity (Q(10)) in the TFP (5.67-9.43) than in other seasons (2.65-2.99). The cumulative non-growing season soil CO2 emission was 228-358 g CO2 m(-2), accounted for 25-26% of annual emissions. The integrated contribution of non-growing season to annual emission based on season-specific, annual and growing season Q(10) model were 26-27%, 32-34% and 44-45%, respectively, season-specific model may improve the accuracy of estimating the soil CO2 emissions. Our results indicate that non-growing season contributes a large portion of the annual soil CO2 emission in the permafrost region of the Qinghai-Tibet Plateau. Hence, estimating of annual C balance must consider the non-growing season soil CO2 emission, and should not neglect the soil CO2 emission of swamp meadow. (C) 2015 Elsevier Masson SAS. All rights reserved.
KeywordWinter Soil Respiration q(10) Freeze-thaw Alpine Meadow Qinghai-tibet Plateau
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1016/j.ejsobi.2015.10.004
WOS Subject ExtendedEnvironmental Sciences & Ecology ; Agriculture
Indexed BySCI
WOS KeywordCOLD-SEASON ; VEGETATION TYPE ; CARBON-DIOXIDE ; SNOW DEPTH ; RESPIRATION ; ECOSYSTEMS ; WATER ; PATTERNS ; CLIMATE ; EFFLUX
Language英语
Quartile4区
TOP
WOS SubjectEcology ; Soil Science
WOS IDWOS:000366539200006
Funding OrganizationNational Basic Research Program of China(2013CBA01807) ; National Natural Science Foundation of China(41271224) ; CAS/SAFEA International Partnership Program for Creative Research Teams(KZZD-EW-TZ-06)
Citation statistics
Cited Times:22[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/14020
Collection山地表生过程与生态调控重点实验室
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100000, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Zhang, Tao,Wang, Genxu,Yang, Yan,et al. Non-growing season soil CO2 flux and its contribution to annual soil CO2 emissions in two typical grasslands in the permafrost region of the Qinghai-Tibet Plateau[J]. EUROPEAN JOURNAL OF SOIL BIOLOGY,2015,71:45-52.
APA Zhang, Tao,Wang, Genxu,Yang, Yan,Mao, Tianxu,&Chen, Xiaopeng.(2015).Non-growing season soil CO2 flux and its contribution to annual soil CO2 emissions in two typical grasslands in the permafrost region of the Qinghai-Tibet Plateau.EUROPEAN JOURNAL OF SOIL BIOLOGY,71,45-52.
MLA Zhang, Tao,et al."Non-growing season soil CO2 flux and its contribution to annual soil CO2 emissions in two typical grasslands in the permafrost region of the Qinghai-Tibet Plateau".EUROPEAN JOURNAL OF SOIL BIOLOGY 71(2015):45-52.
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