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KMID : 0380119990220040211
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Korean Journal of Ecology
1999 Volume.22 No. 4 p.211 ~ p.217
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Spatial Distribution of Herbal Vegetation along Mircrotopographic Gradients Formed by Disturbance in a Temperate Deciduous Hardwood Forest
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Lee Kyu-Song
Cho Do-Soon
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Abstract
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Spatial distribution of herbal vegetation and changes in environmental factors along microtopographic gradients (pit. mound and flat area) were investigated in Mt. Jumbong which lies within the core area of Mt. Sorak Biosphere Reserve. Pits were formed by mammal disturbance on the north-facing slope and by tree-fall disturbance on the ridge in Mt. Jumbong. Mean size of pits on the ridge was larger than that on the north-facing slope. However, the density and fraction of the pit on the ridge were less than those on the north-facing slope. Soil moisture content and thickness of litter and organic layer were higher, but soil temperature was lower at the pits than at the mounds or flat areas. The thickness of litter and organic layer at the mounds was generally lower than that at the flat areas. Coverage, standing biomass, species richness and species diversity of herbal vegetation at the pits were lower than at the mounds and flat areas on the both ridge and north-facing slope. Such vegetational factors at the pits on the ridge tended to be lower than those on the north-facing slope. Establishment and growth of almost all herbal species were inhibited at the pits and the mounds formed by disturbance in Mt. Jumbong. However, Leontice microrhyncha, which was designated as a rare species in Korea, showed a vigorous growth and the best establishment at the pits on the north-facing slope. Therefore, we concluded that the pits formed by mammal disturbance on the north-facing slope in Mt. Jumbong might play a role of the safe-site for Leontice microrhyncha.
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