Water Repellency of Biological Soil Crusts and Influencing Factors on the Southeast Fringe of the Tengger Desert, North-Central China
Water Repellency of Biological Soil Crusts and Influencing Factors on the Southeast Fringe of the Tengger Desert, North-Central China
复制标题
中北腾格里沙漠东南缘生物土壤结皮的拒水性及其影响因素
DOI：
10.1097/ss.0000000000000084
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发表时间：
2014-09
期刊：
影响因子：
--
通讯作者：
Jia Rongliang
中科院分区：
文献类型：
--
作者：
Yang Haotian;Liu Lichao;Li Xinrong;Wei Yongping;Li Xiaojun;Jia Rongliang
摘要生物土壤结皮在干旱荒漠区的水文生态过程中起着重要作用。拒水性（WR）的BSC是一个重要的属性，因为它改变了当地的水文制度，影响生态系统功能。然而，不同类型的BSC的WR的变化和田间条件下的时间变化相对未知。采用水滴穿透时间试验，对强降雨后4种BSC和移动的沙的实际水阻力进行了连续观测。固定沙丘表面生物结皮的发育显著促进了水资源的利用。在田间条件下，四种BSC随时间变化的WR受环境因素的影响。当土壤含水量或空气相对湿度增加到一定程度以上时，土壤含水量增加，土壤含水量下降。然而，不同类型的结壳的峰值水平各不相同。对于BSC的表面温度和空气温度，四种BSC的WR随着温度的升高而降低。我们的研究结果表明，在干旱荒漠生态系统中，BSC的WR在很大程度上取决于结皮的发展阶段，以及环境因素，如前期表土水分条件，相对湿度，地表温度和空气温度。
Abstract Biological soil crusts (BSC) have key roles in hydrological and ecological processes in arid desert areas. Water repellency (WR) of BSC is an important property because it modifies the local hydrological regimes and affects ecosystem functions. However, the variations of WR in different types of BSC and the temporal variations under field condition are relatively unknown. Actual WR of four types of BSC and mobile sand were observed sequentially after heavy rainfall using the water drop penetration time test. The development of BSC on the surface of stabilized sand dune markedly promotes WR. The WR of four types of BSC variation across time was influenced by environmental factors under field conditions. The WR increased as soil moisture content or air relative humidity increased up to a level above which WR decreased. However, the peak levels varied between the different types of crusts. For surface temperature of BSC and air temperature, the WR of the four types of BSC decreased with increasing temperature. Our results demonstrate that the WR of BSC in arid desert ecosystems depends greatly on the developmental stages of the crusts, as well as environmental factors, such as antecedent topsoil moisture conditions, relative humidity, surface temperature, and air temperature.
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影响因子：
--
作者：
Kidron, GJ;Yaalon, DH;Vonshak, A
通讯作者：
Vonshak, A
影响因子：
2.1
作者：
R. Katznelson
通讯作者：
R. Katznelson
影响因子：
2.5
作者：
A. Lamparter;M. Deurer;J. Bachmann;W. Duijnisveld
通讯作者：
A. Lamparter;M. Deurer;J. Bachmann;W. Duijnisveld
DOI：
--
发表时间：
1990
期刊：
--
影响因子：
--
作者：
L. Dekker;P. Jungerius
通讯作者：
L. Dekker;P. Jungerius
影响因子：
3.2
作者：
S. Doerr;A. Ferreira;R. Walsh;R. Shakesby;G. Leighton-Boyce;C. Coelho
通讯作者：
S. Doerr;A. Ferreira;R. Walsh;R. Shakesby;G. Leighton-Boyce;C. Coelho