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
文献类型：期刊论文
| 作者 | Zhang, Tao1,2; Wang, Genxu1 ; Yang, Yan1; Mao, Tianxu1,2; Chen, Xiaopeng1,2
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| 刊名 | EUROPEAN JOURNAL OF SOIL BIOLOGY
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| 出版日期 | 2015-11-01 |
| 卷号 | 71页码:45-52 |
| 关键词 | Winter soil respiration Q(10) Freeze-thaw Alpine meadow Qinghai-Tibet Plateau |
| ISSN号 | 1164-5563 |
| 通讯作者 | Wang, Genxu |
| 英文摘要 | Non-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. |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
| 类目[WOS] | Ecology ; Soil Science |
| 研究领域[WOS] | Environmental Sciences & Ecology ; Agriculture |
| 关键词[WOS] | COLD-SEASON ; VEGETATION TYPE ; CARBON-DIOXIDE ; SNOW DEPTH ; RESPIRATION ; ECOSYSTEMS ; WATER ; PATTERNS ; CLIMATE ; EFFLUX |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000366539200006 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/14020]  |
| 专题 | 成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室 |
| 作者单位 | 1.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 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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