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RISS 인기검색어
- 검색키워드
- 저자 : Yoshihisa Suyama (검색결과 3 건)
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The distribution and population status of Quercus myrsinifolia (Fagaceae) on the Korean peninsula
이정현,이동혁,최혁재,Yoshihisa Suyama,Toshiaki Kondo,Yuji Isagi,최병희 한국식물분류학회 2014 식물 분류학회지 Vol.44 No.3
Most evergreen Quercus species are typical, dominant members of Korean evergreen forests. However, little is known about the distribution status of Q. myrsinifolia Blume there. To enhance our knowledge about their natural range in Korea, we conducted field surveys based on specimen records and an extensive literature search. We also determined their exact number as a first step in planning their conservation. The results indicated that these trees are strictly limited to Jin Island, and 169 mature individuals were the maximum number and occurred in only three subpopulations on that island. Previous misidentifications and perhaps mislabeled locations for plant specimens were the main reasons for earlier confusion about distribution. We believe that these results can provide guidance when making specific recommendations for management interventions. These discoveries also demonstrate the value in having reliable information about plant specimens in general. We also speculated about what makes this species particularly vulnerable to local extinction.
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최혁재,Shingo Kaneko,Masashi Yokogawa,송관필,김대신,강신호,Yoshihisa Suyama,Yuji Isagi 한국식물학회 2013 Journal of Plant Biology Vol.56 No.4
The conservation status of Euchresta japonica Hook. f. ex Regel in Korea was investigated, with an emphasis on its genetic diversity. From field surveys, we obtained the only locality record for a wild population in Korea, which contained eight individuals. Genotyping was performed using nine microsatellite markers for all 20 remaining individuals, including those in ex situ collections. Among nine microsatellite loci that amplified within this group, five showed polymorphism with low hererozygosities, and a total of 12 multilocus genotypes were detected. Wild-specific alleles were detected in two individuals, and ex situ-specific alleles were detected in six individuals. Five individuals proved to have individual-specific alleles. The Korean population was also distinguished from the previously reported Japanese population by different alleles and higher diversity. To conserve this species more effectively in Korea, we recommend the following: (1) fencing the remaining wild population; (2) no relocation of wild individuals, as nine ex situ plants are already available; (3) complete ex situ conservation of all genetic diversity via clonal propagation of wild individuals; and (4) continuous protection and monitoring of the wild population.
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Choi, Hyeok-Jae,Ito, Takuya,Yokogawa, Masashi,Kaneko, Shingo,Suyama, Yoshihisa,Isagi, Yuji The Korean Society of Plant Taxonomists 2017 식물 분류학회지 Vol.47 No.1
The population status of Hydrangea luteovenosa Koidz. in Korea was investigated, with an emphasis on its genetic diversity. From field surveys, we obtained the only locality record for a wild population in Jeju Island, which contained 285 individuals in total. Genotyping was performed using five microsatellite markers for the all extant plants in Korea. Three Japanese populations were also genotyped for the comparative analyses. The genotyping result showed that the Jeju population consisted of only two multilocus genotypes, including identical heterozygous genotypes at two loci; it had been maintained mostly by vegetative reproduction; and although the Jeju population is geographically far from Japanese populations, all alleles observed in the Korean population were shared with Japanese populations, suggesting the possibility that H. luteovenosa in the Jeju Island had been recently migrated or introduced from Japan. Future ecological and genetic studies associated with negative effects of low genetic variation will be essential for determining the conservation direction of the threatened Korean population of this species.
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