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题名: The increasing distribution area of zokor mounds weaken greenhouse gas uptakes by alpine meadows in the Qinghai-Tibetan Plateau
作者: Zhang, Wei1; Liu, Chunyan1; Zheng, Xunhua1; Fu, Yongfeng1; Hu, Xiaoxia1; Cao, Guangmin2; Butterbach-Bahl, Klaus3
刊名: SOIL BIOLOGY & BIOCHEMISTRY
出版日期: 2014-04-01
卷号: 71, 页码:105-112
关键词: Alpine meadows ; Plateau zokor ; Zokor mound ; Greenhouse gas exchange ; Soil organic carbon ; Over-grazing
文章类型: Article
中文摘要: The population of the plateau zokor (Myospalax fontanierii) rapidly increases on the degraded alpine meadows of Qinghai-Tibetan Plateau. The burrowing and feeding activities of plateau zokor exert huge effects on the plant community and soil properties. However, the possible effects on the production and consumption of greenhouse gases have not been investigated. To evaluate the effects, we measured the ecosystem respiration (Re), soil methane (CH4) and nitrous oxide (N2O) fluxes and the main soil, vegetation and environmental factors of zokor mounds of different excavation years (one-, two- and three to five-year, hereafter referred to as ZM1, ZM2 and ZM3-5) and surrounding control meadow (CM) in a typical Kobresia humilis meadow from July to November 2012. The cumulative Re, CH4 uptake and N2O emissions were 1.82 +/- 0.28, 2.83 +/- 0.48, 3.13 +/- 0.13 and 3.91 +/- 0.27 ton C ha(-1), 1.55 +/- 0.27, 1.33 +/- 0.15, 1.20 +/- 0.16 and 1.02 +/- 0.25 kg C ha(-1) and 0.23 +/- 0.02, 0.10 +/- 0.04, 0.08 +/- 0.01 and 0.07 +/- 0.02 kg N ha(-1) for ZM1, ZM2, ZM3-5 and CM, respectively. The soil CH4 uptake and N2O emission were stimulated and the Re was inhibited for ZM1, ZM2 and ZM3-5 as compared to the CM. If the distribution area of zokor mounds increased from 2% to 6%, the combined CO2-equivalent of CH4 and N2O exchanges strengthened 3.2 times. Furthermore, the composition of plant community altered; the plant biomass, topsoil organic carbon content, temperature and moisture decreased; and the topsoil gas permeability, inorganic nitrogen and dissolved organic carbon contents increased on zokor mounds as compared to the CM (P < 0.05). The recovery process of the vegetation and soil organic carbon pools of zokor mounds requires many years (>10 years). In view of the loss of soil organic carbon and the stimulation of N2O emission, the increasing distribution area of zokor mounds weaken the function of alpine meadows on the Qinghai-Tibetan Plateau as a greenhouse gas sink. (C) 2014 Elsevier Ltd. All rights reserved.
英文摘要: The population of the plateau zokor (Myospalax fontanierii) rapidly increases on the degraded alpine meadows of Qinghai-Tibetan Plateau. The burrowing and feeding activities of plateau zokor exert huge effects on the plant community and soil properties. However, the possible effects on the production and consumption of greenhouse gases have not been investigated. To evaluate the effects, we measured the ecosystem respiration (Re), soil methane (CH4) and nitrous oxide (N2O) fluxes and the main soil, vegetation and environmental factors of zokor mounds of different excavation years (one-, two- and three to five-year, hereafter referred to as ZM1, ZM2 and ZM3-5) and surrounding control meadow (CM) in a typical Kobresia humilis meadow from July to November 2012. The cumulative Re, CH4 uptake and N2O emissions were 1.82 +/- 0.28, 2.83 +/- 0.48, 3.13 +/- 0.13 and 3.91 +/- 0.27 ton C ha(-1), 1.55 +/- 0.27, 1.33 +/- 0.15, 1.20 +/- 0.16 and 1.02 +/- 0.25 kg C ha(-1) and 0.23 +/- 0.02, 0.10 +/- 0.04, 0.08 +/- 0.01 and 0.07 +/- 0.02 kg N ha(-1) for ZM1, ZM2, ZM3-5 and CM, respectively. The soil CH4 uptake and N2O emission were stimulated and the Re was inhibited for ZM1, ZM2 and ZM3-5 as compared to the CM. If the distribution area of zokor mounds increased from 2% to 6%, the combined CO2-equivalent of CH4 and N2O exchanges strengthened 3.2 times. Furthermore, the composition of plant community altered; the plant biomass, topsoil organic carbon content, temperature and moisture decreased; and the topsoil gas permeability, inorganic nitrogen and dissolved organic carbon contents increased on zokor mounds as compared to the CM (P < 0.05). The recovery process of the vegetation and soil organic carbon pools of zokor mounds requires many years (>10 years). In view of the loss of soil organic carbon and the stimulation of N2O emission, the increasing distribution area of zokor mounds weaken the function of alpine meadows on the Qinghai-Tibetan Plateau as a greenhouse gas sink. (C) 2014 Elsevier Ltd. All rights reserved.
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Soil Science
研究领域[WOS]: Agriculture
关键词[WOS]: NITROUS-OXIDE ; MYOSPALAX-FONTANIERII ; METHANE EMISSIONS ; SOIL DISTURBANCE ; NORTHERN CHINA ; NITRIC-OXIDE ; N2O FLUXES ; VEGETATION ; ECOSYSTEM ; TEMPERATURE
收录类别: SCI
语种: 英语
WOS记录号: WOS:000333508400012
Citation statistics:
内容类型: 期刊论文
URI标识: http://210.75.249.4/handle/363003/4241
Appears in Collections:中国科学院西北高原生物研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, State Key Lab Atmospher Boundary Layer Phys & Atm, Inst Atmospher Phys, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Northwest Inst Plateau Biol, Xining 810001, Qinghai, Peoples R China
3.Karlsruhe Res Ctr, Inst Meteorol & Climate Res, Atmospher Environm Res IMK IFU, D-82467 Garmisch Partenkirchen, Germany

Recommended Citation:
Zhang, W; Liu, CY; Zheng, XH; Fu, YF; Hu, XX; Cao, GM; Butterbach-Bahl, K.The increasing distribution area of zokor mounds weaken greenhouse gas uptakes by alpine meadows in the Qinghai-Tibetan Plateau,SOIL BIOLOGY & BIOCHEMISTRY,2014,71():105
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