Spatial distribution patterns and implications for conservation ofScrophularia takesimensis (Scrophulariaceae), an endangered endemic species on Ulleung Island, Korea |
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Authors: | Yeongseok Lim Sung-Tae Na Sung-Jin Lee Kang Hyun Cho Hyunchur Shin |
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Institution: | (1) Department of Biology, Soonchunhyang University, 336-745 Asan, Korea;(2) Researcn Institute of EcoScience, Ewha Woman’s University, 20-750 Seoul, Korea;(3) Department of Biology, Inha University, 402-751 Incheon, Korea |
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Abstract: | As part of an on-going effort to conserve endangered and endemicScrophularia takesimensis (Scrophulariaceae), we analyzed its spatial distribution patterns by applying an index of dispersion, plant-to-all-plant
distances, and the varying quadrat size method. Three indices — Dispersion, Morisita, and Standardized Morisita — all revealed
clumping with small aggregates, and distances between aggregates were more or less regular. The asymptote level occurred at
a distance of 20 to 30 m; the distance showing 90% of cumulative frequency coincided with 20 to 21 m; 95%, 24 to 25 m; and
99%, 31 to 32 m. The 20 m× 20 m and 40 m×40 m quadrats contained 25 and 40 plants, respectively. We conclude that this number
of individuals and size of area are the minimum required for the conservation of this species. |
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Keywords: | Conservation Scrophularia takesimensis spatial distribution pattern Ulleung Island |
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