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Strong temperature dependence and no moss photosynthesis in winter CO2 flux for a Kobresia meadow on the Qinghai-Tibetan plateau
Kato, T; Hirota, M; Tang, YH; Cui, XY; Li, YN; Zhao, XQ; Oikawa, T
2005-10-01
发表期刊SOIL BIOLOGY & BIOCHEMISTRY
卷号37期号:10页码:1966-1969
文章类型Article
摘要We examined the CO2 exchange of a Kobresia meadow ecosystem on the Qinghai-Tibetan plateau using a chamber system. CO2 efflux from the ecosystem was strongly dependence on soil surface temperature. The COZ efflux-temperature relationship was identical under both light and dark conditions, indicating that no photosynthesis could be detected under light conditions during the measurement period. The temperature sensitivity (Q(10)) of the COZ efflux showed a marked transition around -1.0 degrees C; Q(10) was 2.14 at soil surface temperatures above and equal to -1.0 degrees C but was 15.3 at temperatures below -1.0 degrees C. Our findings suggest that soil surface temperature was the major factor controlling winter COZ flux for the alpine meadow ecosystem and that freeze-thaw cycles at the soil surface layer play an important role in the temperature dependence of winter CO2 flux. (c) 2005 Elsevier Ltd. All rights reserved.; We examined the CO2 exchange of a Kobresia meadow ecosystem on the Qinghai-Tibetan plateau using a chamber system. CO2 efflux from the ecosystem was strongly dependence on soil surface temperature. The COZ efflux-temperature relationship was identical under both light and dark conditions, indicating that no photosynthesis could be detected under light conditions during the measurement period. The temperature sensitivity (Q(10)) of the COZ efflux showed a marked transition around -1.0 degrees C; Q(10) was 2.14 at soil surface temperatures above and equal to -1.0 degrees C but was 15.3 at temperatures below -1.0 degrees C. Our findings suggest that soil surface temperature was the major factor controlling winter COZ flux for the alpine meadow ecosystem and that freeze-thaw cycles at the soil surface layer play an important role in the temperature dependence of winter CO2 flux. (c) 2005 Elsevier Ltd. All rights reserved.
关键词Co2 Gas Diffusion Freeze-thaw Cycles Microbial Respiration Moss Photosynthesis Spatial Variability
WOS标题词Science & Technology ; Life Sciences & Biomedicine
学科领域生物科学
关键词[WOS]ECOSYSTEM ; RESPIRATION ; SOIL
收录类别SCI
语种英语
WOS研究方向Agriculture
WOS类目Soil Science
WOS记录号WOS:000231522500026
引用统计
被引频次:20[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://210.75.249.4/handle/363003/1362
专题中国科学院西北高原生物研究所
作者单位1.Japan Agcy Marine Earth Sci & Technol, Frontier Res Ctr Global Change, Ecosyst Change Res Program, Yokohama, Kanagawa 236001, Japan
2.Natl Inst Environm Studies, Tsukuba, Ibaraki 3058506, Japan
3.Chinese Acad Sci, Grad Sch, Yuanquanlu 100091, Peoples R China
4.Chinese Acad Sci, NW Plateau Inst Biol, Xining 810001, Qinghai, Peoples R China
5.Univ Tsukuba, Inst Biol Sci, Tsukuba, Ibaraki 3058572, Japan
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Kato, T,Hirota, M,Tang, YH,et al. Strong temperature dependence and no moss photosynthesis in winter CO2 flux for a Kobresia meadow on the Qinghai-Tibetan plateau[J]. SOIL BIOLOGY & BIOCHEMISTRY,2005,37(10):1966-1969.
APA Kato, T.,Hirota, M.,Tang, YH.,Cui, XY.,Li, YN.,...&Oikawa, T.(2005).Strong temperature dependence and no moss photosynthesis in winter CO2 flux for a Kobresia meadow on the Qinghai-Tibetan plateau.SOIL BIOLOGY & BIOCHEMISTRY,37(10),1966-1969.
MLA Kato, T,et al."Strong temperature dependence and no moss photosynthesis in winter CO2 flux for a Kobresia meadow on the Qinghai-Tibetan plateau".SOIL BIOLOGY & BIOCHEMISTRY 37.10(2005):1966-1969.
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