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学科主题: 生物学::植物学::植物生理学
题名:
Multi-scale heterogeneity of soil moisture following snow thawing in Haloxylon ammodendron shrubland
作者: Li ; Jun1 ; 2 ; Zhao ; ChenYi1 ; Zhu ; Hong1 ; Wang ; Feng1 ; LiJuan1 ; Kou ; SiYong1
关键词: Gaussian model - Geostatistics - Moisture distribution - Semivariogram
刊名: Science in China, Series D: Earth Sciences
发表日期: 2007
卷: 50, 期:SUPPL. 1, 页:49-55
收录类别: SCI ; EI
部门归属: 1 Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi830011, China2 Graduate School of Chinese Academy of Sciences, Beijing 100049, China
摘要: Spatial variation of soil moisture after snow thawing in South Gurbantunggut was quantitatively studied using ANOVA and geostatistics at various scales. The results show that the soil moisture heterogeneity varies along with spatial scales. At the shrub individual scale, there is a gradient in soil moisture from shrub-canopied area to canopy margin and to the interspaces between shrubs. At the community scale, soil moisture is highly autocorrelated and the semivariogram is fitted as spherical model, with an 89.6% structural variance and a range of 4.02 m. In addition, Kringing map indicates that the soil moisture distribution pattern after snow thawing is highly consistent with the shrub patch pattern. At the typical inter-dune transect scale, soil moisture presents a pattern of high value at inter-dune depression and low value at dune, and this variation is fitted as Gaussian model with a structural variance of 95.8% and a range of 66.16 m. The range is comparable with the scale of topography zoning, suggesting that the topography pattern controls the pattern of snowmelt at this scale. The evidence indicates that the heterogeneity of soil moisture at various scales is controlled by various land surface processes after snow thawing. For Gurbantunggut Desert, the spatial heterogeneity of snowmelt at various scales is ecologically valuable, because it promotes the utilization efficiency of the snowmelt for the desert vegetation. © Science in China Press 2007. (21 refs.)
内容类型: 期刊论文
URI标识: http://ir.xjlas.org/handle/365004/10676
Appears in Collections:中国科学院新疆生态与地理研究所(2010年以前数据)_期刊论文

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Recommended Citation:
Li,Jun1,2,et al. Multi-scale heterogeneity of soil moisture following snow thawing in Haloxylon ammodendron shrubland[J]. Science in China, Series D: Earth Sciences,2007,50(SUPPL. 1):49-55.
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