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标题：Diversity of Predatory Rhagidiid Mites (Acari: Rhagidiidae) Inhabiting Montane Stony Debris in the Ötztal Alps, North Tyrol, Austria
其他标题：Diversity of Predatory Rhagidiid Mites (Acari: Rhagidiidae) Inhabiting Montane Stony Debris in the Ötztal Alps, North Tyrol, Austria
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作者：Miloslav Zacharda ; Tomáš Kučera
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：2006
卷号：38
期号：2
页码：292-300
DOI：10.1657/1523-0430(2006)38[292:DOPRMA]2.0.CO%3B2
摘要：Critical revision is presented of taxa comprising 27 verified species of Rhagidiidae from the Alps. Assemblages of endemic, Palearctic, and Holarctic Rhagidiidae inhabiting montane stony debris in the Ötztal Alps, North Tyrol, Austria, consist of 2 to 9 species, and Poecilophysis pseudoreflexa is the most abundant and widely distributed species. The highest species richness and endemism are in the mid-alpine zone (2400–2600 m a.s.l.) and the high alpine zone (2600–2800 m a.s.l.). A particular assemblage of rhagidiids of low diversity occurred in voids of a bare scree slope. Cluster and numerical multivariate analyses revealed that (1) the different altitudinal niches of a majority of common species overlap, but some species become rare with increasing altitude; (2) additional species of rhagidiid mites might be expected to be found in special, previously uncollected microhabitats; (3) rhagidiid mites having some affinities to specific environmental factors can be distinguished; (4) the altitudinal gradient proved to be the significant complex environmental factor influencing the occurrence of mites; (5) moisture proved to influence abundance of mites but has no direct relation to species identity; and (6) in contrast, dryness proved to be bound with the occurrence of particular species of rhagidiid mites.