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KMID : 0613820230330030227
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Journal of Life Science
2023 Volume.33 No. 3 p.227 ~ p.233
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Spatial Distribution Pattern of Patches of Erythronium japonicum at Mt. Geumjeong in Korea
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Huh Man-Kyu
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Abstract
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The purpose of this paper was to describe a statistical analysis for the spatial distribution of geographical distances of Erythronium japonicum at Mt. Geumjeong in Korea. The spatial pattern of E. japonicum was analyzed according to the nearest neighbor rule, population aggregation under different plot sizes by dispersion indices, and spatial autocorrelation. Most natural plots of E. japonicum were uniformly distributed in the forest community. Disturbed plots were aggregately distributed within 5 m×5 m of one another. Neighboring patches of E. japonicum were predominantly 7.5~10 m apart on average. If the natural populations of E. japonicum were disturbed by human activities, then the aggregation occurred in a shorter distance than the 7.5~10 m distance scale. The Morisita index (IM) is related to the patchiness index (PAI) that showed the 2.5 m×5 m plot had an overly steep slope at the west and south areas when the area was smaller than 5 m×5 m. When the patch size was one 2.5 m×5 m quadrat at the west distributed area of Mt. Geumjeong, the cluster was determined by both species characteristics and environmental factors. The comparison of Moran’s I values to a logistic regression indicated that individuals in E. japonicum populations at Mt. Geumjeong could be explained by isolation by distance.
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KEYWORD
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Erythronium japonicum, Moran’s I, Mt. Geumjeong, patchiness index, spatial distribution
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