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标题：The Relict Mite Rhagidia gelida (Acari, Rhagidiidae) as a Biological Cryoindicator of Periglacial Microclimate in European Highland Screes
其他标题：The Relict Mite Rhagidia gelida (Acari, Rhagidiidae) as a Biological Cryoindicator of Periglacial Microclimate in European Highland Screes
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作者：Miloslav Zacharda ; Martin Gude ; Susanne Kraus 等
期刊名称：Arctic, Antarctic, and Alpine Research
印刷版ISSN：1523-0430
电子版ISSN：1938-4246
出版年度：2005
卷号：37
期号：3
页码：402-408
DOI：10.1657/1523-0430(2005)037[0402:TRMRGA]2.0.CO%3B2
摘要：The periglacial temperature regime in cool scree slopes located at subalpine altitudes of only 300–600 m a.s.l. in the Czech highlands is described and proved by the occurrence of a relict population of the predatory mite Rhagidia gelida Thorell (Acari, Prostigmata, Rhagidiidae). The mite has a circum-boreal pattern of distribution today, but its disjunct populations have an island-like pattern of distribution in the cool screes in the Czech highlands. R. gelida is univoltine, freezing intolerant, and considered a biological cryoindicator of the periglacial microclimate. As coolness is needed for R. gelida to survive in the cool screes, it is concluded that the scree slope patchy permafrost-like habitats have lasted continuously, perhaps persisting in modified form as paleorefugia, since the Pleistocene.