인위적 교란 정도에 따른 토양서식 포식성 중기문 응애류 군집 구조 비교 = Community Structures of Soil Predatory Mites (Acari: Gamasida) Relative to the Human Disturbance Gradient

다국어 초록 (Multilingual Abstract)

Disturbance by human interference such as tillage could affect soil ecosystem components and functions. This study investigated the structure of gamasid mite community, the predatory group of soil mesofauna, at the species level relative to the disturbance gradient, annual broadleaf plant (milk vetch, Astragalus sinicus), perennial grass, and nut pine forest (Pinus koraiensis). We found lowest abundance of the gamasid mites in milk vetch, which had the most severe disturbances. Highest abundance were found from nut pine stand followed by the grassland. The gamasid mite abundance, species and diversity index was inversely proportional to the degree of disturbances. In nut pine stand, 17 species in 6 family were found. In nut pine stand, 95% of individuals were found from humus layer relative to the soil layer (5%), and 89% of species were found from the humus layer. In annual plant plots, species in Hypoaspis genera were mostly found followed by Lasioseius lasiodactyli. In nut pine stand, Eugamasus fujisanus, Veigaia uenoi, Holaspina commuis were dominant. Since the gamasid mites are the top predator of soil mesofauna, different association of the dominant species would be related to the abundance of prey groups such as collembolan, Oribatida and nematodes. Further study would pursue the relationship between the group of preys and predatory mite interaction.