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KMID : 0613820180280020148
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Journal of Life Science
2018 Volume.28 No. 2 p.148 ~ p.152
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Spatial Distribution Pattern of Chloranthus japonicus Population at Mt. Ahop
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Huh Man-Kyu
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Abstract
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The patchiness of local environments within a habitat is assumed to be a primary factor affecting the spatial patterns of plants, and a randomization procedure is developed for testing the null hypothesis that only spatial association with patches determined the spatial patterns of plants. Chloranthus japonicus (Chloranthaceae) is an herbaceous perennial and a member of the genus Chloranthus in the family Chloranthaceae. The spatial pattern of C. japonicus was analyzed according to several patchiness indices, population uniformity or aggregation under different sizes of plots by dispersion indices, and spatial autocorrelation. Population densities (D) varied from 0.356 to 2.270, with a mean of 1.527. The values of dispersion indices ( at Mt. Ahop were lower than 1 at six plots (2 m×2 m, 2 m×4 m, 4 m×4 m, 4 m×8 m, 8 m×8 m, and 8 m×16 m), but the two large plots (16 m×16 m and 16 m ×32 m) were higher than 1. Thus, the aggregation indices ( were negative at Mt. Ahop, which indicates a uniform distribution. The two large plots (16 m×16 m and 16 m×32 m) had positive CIs. However, the values were not large (0.009 for the 16 m×16 m plot and 0.038 for the 16 m×32 m plot). The mean crowding (M*) and patchiness index (PAI) showed positive values for all plots.
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KEYWORD
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Chloranthus japonicus, Mt. Ahop, mean crowding, patchiness index, spatial distribution
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