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KMID : 0368420080510030213
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Journal of Plant Biology
2008 Volume.51 No. 3 p.213 ~ p.213
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Spatial distribution patterns and implications for conservation of Scrophularia takesimensis (Scrophulariaceae), an endangered endemic species on Ulleung Island, Korea
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Lim Yeong-Seok
Na Sung-Tae
Lee Sung-Jin
Cho Kang-Hyun
Shin Hyun-Chur
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Abstract
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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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KEYWORD
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Conservation, Scrophularia takesimensis, spatial distribution pattern, Ulleung Island
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