Question

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The soil properties associated with rock fragment clusters did not differ from those of the intershrub areas. This might be attributable to the content of the clusters: surface-lying and partly embedded rock fragments. Soil moisture content is expected to be higher underneath surface-lying rock fragments because of a mulching effect whereby the rock fragments reduce splash impact, surface sealing and crusting, and thereby increase infiltration (Poesen and Ingelmo-Sanchez, 1992; Poesen et al., 1994; Valentin, 1994), as well as a shading effect which reduces evaporative losses (Poesen and Lavee,1994). In addition,water flow generated on the surface of the rock fragment augments the amount of water entering the soil underneath it (Poesen et al., 1994).
Partially embedded rock fragments function differently; they seal the soil surface and reduce infiltration capacity (Poesen and Ingelmo- Sanchez, 1992; Poesen and Lavee, 1994; Valentin, 1994).

Answer 1

与岩片簇相关的土壤属性与那些林间地域的没有什么差别。这可能是加在一起这些簇的内容所致：地表岩石以及部分嵌入岩石碎片中。地表岩石碎片下土壤水分含量会高一些，因为覆盖物的原因，因此岩石碎片会降低其溅湿、表面封闭和地壳效应，因此增加渗透（Poesen and Ingelmo-Sanchez, 1992; Poesen et al., 1994; Valentin, 1994），以及树荫效应，这一效应会降低水分的蒸发流失（Poesen and Lavee,1994）。另外，岩石碎片表面产生的水流会增加其下面渗入的水量（Poesen et al., 1994）。
部分嵌入的岩石碎片功能则不同，它们封闭土壤表面，并降低渗透力（Poesen and Ingelmo- Sanchez, 1992; Poesen and Lavee, 1994; Valentin, 1994）。
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