• Korean Journal of Environment and Ecology
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• v.34 no.5
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• pp.483-490
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• 2020

This study aims to construct an ecological community and lay the foundation for sustainable development in the Korean Peninsula by promoting cooperation between the South and North Korea in the non-political and no-military natural environment sector under the rapidly changing inter-Korean relations. It analyzed South Korea's aid and international cooperation projects in natural environmental sectors in North Korea and examined North Korea's national plan and the cooperation projects that North Korea proposed to the international community to identify potential cooperation projects. It selected 15 potential cooperation projects and 6 crucial factors to be considered in prioritizing the projects through case studies and the first expert survey (five persons). The six crucial factors were i) urgency, ⅱ) linkage between North and South Korea (ecological community in the Korean Peninsula), ⅲ) contribution to sustainable development (prosperity), i) North Korea's acceptability, ⅴ) cooperation conditions and budget, and ⅵ) project sustainability. The second expert survey (14 persons) focused on prioritizing the 15 potential inter-Korean cooperation projects in line with six crucial factors. The 15 potential inter-Korean cooperation projects in the natural environment were comprehensively reviewed and scored based on the six crucial factors. The resulting priority projects were identified as follow: i) Mt. Seorak - Mt. Keumgang International Peace Park, ⅱ) support and cooperation for agro-forestry, ⅲ) joint conservation projects for internationally important migratory birds (such as Black-faced Spoonbills and Cranes), iv) inter-Korean ecotourism linkage and promotion, and ⅴ) establishment of integrated information system on leading ecosystems and biodiversity in the Korean Peninsula. The priority cooperation projects presented in this study are based on the perception of experts engaged in inter-Korean natural environmental cooperation in consideration of existing cooperation cases and conditions. For the actual implementation of these potential projects, a systematic approach, including the formation of consensus between North and South Koreas and the creation of a cooperative network with suitable partners suitable for each project's characteristics, would be needed.

• Korean Journal of Agricultural Science
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• v.16 no.1
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• pp.1-18
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• 1989

This experiment was undertaken to clarify derivation of resistance of Japonica type of rice varieties to rice blast in Korea and to classify Japonica type of rice varieties on the basis of their rice blast reaction in the blast nuisery test. 1. The resistance of Iljin, Kwancheok 9, Koshi, Baedal and Paldal, Jaekeon, Sinpung, Jinheung, Hokwang and Palkeum, and Gwangmyungbyeo and Yeongdeogbyeo to rice blast was derived from Kyudai Taicho Asahi 3, Futaba and 2067, respectively. 2. The resistance of Kwanok, Mankyeong and Nongbaek to the rice blast was derived from Kanto 55, Hokwang and Kusabue, and Ishigarisiroge, respectively. 3. The resistance of Seomjinbyeo, Sinseonchalbyeo, Donghaebyeo and Tamjinbyeo to the rice blast was derived from Milyang 20 and the source of resistance to the rice blast in Jinjubyeo and Daecheongbyeo was HR 769 or HR 1590. 4. The resistance of Dobongbyeo, Gwanagbyeo and Chiagbyeo to the rice blast was derived from Tjina, Kongo and Kuik 90, respectively. 5. The resistance of Seolagbyeo, Seonambyeo, Kihobyeo, Namyangbyeo, Samnambyeo, Seohaebyeo, Whaseongbyeo, Daegwanbyeo and Taeseongbyeo, and Sobaegbyeo, Odaebyeo and Unbongbyeo to the rice blast was derived from Fuji 280 and Fuji 269, respectively. 6. The source of resistance to the rice blast in Cheonmabyeo and Baegambyeo was BL 7 and Nongbaek, the resistance of Dongjinbyeo and Sangpungbyeo to the rice blast was derived from Satominori and Simokita, respectively. 7. Japonica type of rice varieties was classified into eleven varietal groups according to their reaction to the blast as follows. Eight varieties of Jinheung group, two varieties of Dongjinbyeo group, two varieties of Jinjubyeo group, three varieties of Gwanagbyeo group, four varieties of Sobaegbyeo group, one variety of Nongbaek group, two varieties of Baegambyeo group, five varieties of Sinseonchalbyeo group, five varieties of Seonambyeo group, two varieties of Taeseongbyeo group and some variety of Nagdongbyeo group.

• Journal of Korean Society of Forest Science
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• v.83 no.3
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• pp.365-371
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• 1994

This study was conducted to investigate variations in taxol contents of bark, shoots, needles of three native Taxus species in Korea. Sample materials were collected in early October of 1992 from five individual, trees each of the five populations of Taxus cuspidata located at Mt. Halla, Mt. Jiri, Mt. Deokyu, Mt. Sobaek, and Mt. Taebaek and two individual trees of Taxus cuspitosa in Mt. Seolak and in March of 1993 from the five individual trees of Taxus cuspidata var. latifolia in Ulleung Island. The collected materials were analyzed by HPLC to determine the amount of taxol content. Regardless of species and population, the taxol content was highest in bark and followed by shoots and needles. In Taxars cuspidata the taxol content in the bark was highest for the population of Mt. Halla (0.017%) and decreased in the order of Mt. Jiri, Mt. Sobaek, Mt. Deokyu, and Mt. Taebaek. The taxol content in the shoots was highest for the population of Mt. Halla(0.0053%) and decreased in the order of Mt. Sobaek, Mt. Jiri, Mt. Deokyu, and Mt. Taebaek. The taxol content in the needles was higher for the population of Mt. Halla(0.0013%) than any other populations and decreased in the order of Mt. Taebaek, Mt. Sobaek, Mt. Deokyu and Mt. Jiri. The taxol contents of Taxus caespitosa(0.0035%) were lower than that of Taxus cuspidate in all of the three plant parts. The taxol content of Taxus cuspidate var. latifolia(0.0064%) was higher than that of Taxus cuspidate for shoots and needles, but lower than that of Taxus cuspidate. There was a tendency of increasing taxol contents of bark and shoots of Taxus cuspidate, as latitude decreased. This study indicated that taxol content was relatively high in the populations of Taxus cuspidate. Particularly taxol content in the bark of the Taxus cuspidate in Mt. Halla population was about the same as that of pacific yew, indicating a high potential for commercial use.

• Korean Journal of Environment and Ecology
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• v.38 no.2
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• pp.169-177
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• 2024

This study investigated whether population dynamic analysis based on the height characteristics of Abies nephrolepis was feasible. It was necessary because existing population dynamic analyses based on age and diameter at breast height (DBH) made it difficult to reflect the slow growth characteristics of Abies nephrolepis in harsh environments of high altitudes. The limitations of population dynamics analysis based on the age and DBH distribution of Abies nephrolepis in Seoraksan, Odaesan, and Taebaeksan National Parks, where Abies nephrolepis populations are representative, were verified, and the characteristics of height growth were investigated to comprehensively analyze whether a vertical structure based on height could reveal the population dynamics. The result of this study showed some limitations in understanding the population dynamics of Abies nephrolepis based on age distribution due to practical difficulties in sampling all trees and variations in age distribution within the same community depending on factors such as light conditions. Moreover, it was challenging to differentiate the distribution of DBH classes at fine levels, making it difficult to reflect the rapid growth characteristics of Abies nephrolepis when light conditions become suitable after prolonged stays in smaller DBH classes under shade conditions. However, a comprehensive analysis of the height characteristics of Abies nephrolepis revealed that the density corresponding to the population dynamic characteristics of Abies was high and adequately reflected the predominant tree death at similar height stages, as well as the U-shaped population dynamics at the lower stratum. Moreover, it was possible to identify a transition point in height values under shaded conditions, where the annual growth of Abies nephrolepis individuals in the lower stratum increases significantly, indicating that Abies nephrolepis individuals can escape from competition with other shrubs and undergo vigorous growth only at this height level. Therefore, this study confirmed that a vertical structure based on height can be utilized to understand the population dynamics of Abies nephrolepis in high altitudes, and it is expected that future studies on height characteristics can intuitively reveal the maintenance status of Abies nephrolepis populations in the field.