The Role of Lichens in Inhibiting Erosion of a Soluble Rock
The Role of Lichens in Inhibiting Erosion of a Soluble Rock
复制标题
地衣在抑制可溶岩石侵蚀中的作用
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
G. Lucas
中科院分区：
文献类型：
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作者：
D. Mottershead;G. Lucas
当雨水落在未受保护的岩石表面时，可溶性岩石受到溶液的侵蚀。地衣可能起到保护地表免受这种侵蚀的作用，保护区随后可能从周围的较低的地表出现，形成一个较高的地形。在石膏表面上，骨裂棘和双裂棘的标本也以这种方式发生作用，形成高达15毫米高的圆锥形或圆形土丘。在无孢子虫的情况下，地衣中心腐烂，重新暴露在中心区域的表面溶液中，然后腐蚀形成一个火山口石膏锥。锥形边坡的坡度是地衣径向生长和岩石表面下降的相对速率的函数。
Abstract Soluble rocks undergo erosion by solution when rain falls on an unprotected rock surface. Lichens may act to protect the surface from such erosion, and the protected area may subsequently emerge from the surrounding lowering surface to form an area of higher relief. Specimens of Aspicilia calcarea and Diploschistes diacapsis act in this way on a gypsum surface, creating conical or rounded mounds up to 15 mm in height. In the case of Aspicilia, the lichen centre decays, re-exposing to surface solution the central area, which then corrodes to create a cratered gypsum cone. The gradient of the cone side-slopes is a function of the relative rates of lichen radial growth and rock surface lowering.