東北地方中部の森林限界以上の亜高山帯におけるササラダニ相 : 鳥海山,月山および栗駒山

概要

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Orbatid fauna in the subalpine zone above the forest limit of three mountains located in the central part of the Tohoku district was investigated and compared with that of the mountains in Central and Northeastern Japan. General features of oribatid fauna in the subalpine zone are :(1) An increase in the species number of the family Ceratozetidae, (2) A decrease in the species number of the family Oppidae, (3) A complication of species composition of Camisiidae, (4) A lack of Ametroproctus reticulatus in the subalpine zone from the Kanto district to the central part of the Tohoku district, (5) A scarcity of Rhysocritia ardua which is one of the most common species in the montane and basal zones, (6) The presence of some species mostly restricted to a high altitude ( above 2300 m) in the Chubu district such as Trichoribates rausensis, Diapterobates variabilis honshuensis and Achipteria sp. E, (7) A lack of Maerkelotritia kishidai under snow patch vegetation and apline meadows. This tendency has also been found in the previously investigated oribatid communities in the subalpine zone of Mts. Asahi-dake, Iide-san and Azuma-san.
横浜国立大学の論文