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首页> 外文期刊>Catena: An Interdisciplinary Journal of Soil Science Hydrology-Geomorphology Focusing on Geoecology and Landscape Evolution >Geomorphological significance of lichen colonization in a present snowhollow: Hoya del Cuchillar de las Navajas, Sierra de Gredos (Spain)
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Geomorphological significance of lichen colonization in a present snowhollow: Hoya del Cuchillar de las Navajas, Sierra de Gredos (Spain)

机译：当前雪谷中地衣定植的地貌学意义：塞拉德格雷多斯（西班牙）的霍亚·德尔库奇拉尔·德拉斯·纳瓦哈斯

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摘要

This paper discusses the results of a lichenometrical and geomorphological study of one of the few remaining active snow hollows in the central region of the Iberian Peninsula. The study area, located on a glacial shoulder, is called Hoya del Cuchillar de las Navajas. A protalus rampart occurs at the base of the hollow. Our studies, conducted between 1992 and 1998, were designed to determine the geomorphological characteristics of Hoya, the mobility of the deposits, and the characteristics of the snow cover. These data formed the basis for a study of the lichen colonization on the blocks and on the wall surrounding the snow hollow, All of the lichen species found were analyzed according to their abundance, distribution and the extent of their surface cover, Measurements of the diameter of the thalli of the species Rhizocarpon geographicum were also obtained, Thalli of this species were found to require a mean snow-free growing season of at least 95 days (13.5 weeks) per year. Maximum mean thallus diameters indicate that the protalus rampart was formed during the Little Ice Age and became inactive 130 years ago.
机译：本文讨论了对伊比利亚半岛中部地区剩余的少量活跃积雪坑之一进行地衣法和地貌研究的结果。该研究区位于冰川肩上，被称为霍亚德尔库奇亚尔德拉斯纳瓦哈斯。在空心的底部出现了一个垒壁。我们的研究在1992年至1998年之间进行，旨在确定霍亚的地貌特征，沉积物的流动性和积雪的特征。这些数据为研究地块和雪洞周围墙壁上的地衣定植奠定了基础。根据发现的所有地衣种类，根据其丰度，分布和表面覆盖范围，直径的测量结果对其进行分析。还获得了Rhizocarpon geoum物种的thalli中的一个，其Thalli被发现需要平均每年至少95天（13.5周）的无雪生长季节。最大的平均all体直径表明，在小冰河时代形成了垒壁，并在130年前就没有活动。

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