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Exploratory data analysis onmountaineering patterns of 2030 generationsin the Seoul metropolitan area before and after COVID-19

XV World Forestry Congress, 2-6 May 2022











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    Type classification of damaged forest in the Island Areas, west coast of Korea and analysis on the charaterisitics of restoration sites
    XV World Forestry Congress, 2-6 May 2022
    2022
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    The study aims to produce basic data which can be used in establishing a forest restoration plan in the island areas of the west coast of Korea. First, the damaged type of island area was determined based on the GIS data, and a field study was carried out on 110 of the extracted damaged areas for classified type of forest restoration sites with the Forest Restoration Guidelines of the Korea Forest Service. As a result of the analysis, the total number of islands on the west coast of Korea was 1,977 (254,258 ha), with 323 (248,258 ha) of manned islands and 1,654 (5,871 ha) of uninhabited islands. 11 damage types (590 locations) were extracted through video reading of 2,774 suspected deforestation cases (5,431 ha). The field survey was conducted on 110 locations on 44 islands which were reclassified into 14 damage types. Among the types of forest restoration target sites, the types of damage (12 places) that require restoration of the underlying environment are classified into three categories: facility sites, soil and stone ground, and landslide-damaged sites. it was found to be a man-made damages concentrated in private land with high development pressure, especially in Incheon and Jeollanam-do province by region. Vegetation restoration included 9 different types of damage (96 sites) and it was analyzed that Incheon Metropolitan City and Chungcheongnam-do province have a high rate of grassland and livestock grazing land and Jeollabuk-do province with high distribution of grassland and non-stocked forest land. And Jeollanam-do province had 8 types of damage, relatively more various types of damage confirmed compared to other areas. Habitat and species restoration are required for bird colonies and coastal wetland types (one site, respectively). Plants are dying due to fishery and neglected household waste and bird excrement, therefore it shall be considered from the habitat restoration point of view. The research results are expected to be used in extracting target sites for forest restoration plan and a criteria to find the target sites suitable for the characteristics of damaged areas. Keywords: Monitoring and data collection ID: 3622908
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    Characteristics of sprouts occurrence by cutting to lower the stump height after harvesting the oak forest on the slope
    XV World Forestry Congress, 2-6 May 2022
    2022
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    This study was conducted to suggest an improved cutting to lower the stump height after harvesting that can induce the occurrence of high-quality root sprouts considering the locational characteristics of oak forests distributed mainly on slope. The study site was established in where the location environment and the stump diameter distribution were similar. The stumps were cut (control area) low horizontally based on the top of the slope, and cut (treatment area) parallel to the slope and close to the ground. The average number of occurred sprouts per stump was eleven, and there was no difference between control and treatment. The amount of stump lateral sprouts was decreased by 38% in the treatment (4.3 sprouts/stump) compared to the control (6.9 sprouts/stump). The occurrence of root sprouts (control: 3.8 sprouts/stump, treatment: 6.5 sprouts/stump) increased by 171%. 79.5% of the control lateral sprouts occurred in the lower slope direction where the stump height was relatively high. It was analyzed that lowing the overall stump height was a factor in reducing the occurrence of lateral sprouts. In order to promote the occurrence of high-quality root sprouts, an improved stump cutting, parallel to the slope and close to the ground, would be advantageous. Keywords: Sustainable forest management ID: 3613395
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    The survival rate and stem moisture content after planting of Larix kaempferi container seedling according to thawing conditions
    XV World Forestry Congress, 2-6 May 2022
    2022
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    This study was conducted to find out the optimal thawing conditions in connection with refrigerated storage in nursery stage in order to maintain high seedling quality until planting in plantation. Refrigerated container seedlings of Larix kaempferi were produced under 32 different thawing conditions [2 thawing timings (April, May) × 2 shadings (shading, non-shading) × 2 packaging boxes (open, closed) × 4 thawing duration regimes (1, 3, 6, 12 days)] and then planted in plantation. We performed four-way ANOVA to test the effect of the thawing conditions on survival rate (SR) and stem moisture content (SMC) of thawed seedling after planting. The SR of L. kaempfer seedlings was statistically different in each of the four factors, such as thawing timing, shading, packaging box and duration, and significant interactive effects of four factors were also confirmed. Thawing showed a higher SR of seedlings in April than in May. In both thawing timings, it showed the highest SR of seedlings in the thawing condition in which light was shaded and packaging box was opened. As thawing duration increased, SR of seedlings decreased. The shading and thawing duration significantly affected SMC of L. kaempferi seedlings. The SMC of seedlings tended to increase as the thawing duration becomes longer, which is opposite to the result for SR. High temperature in the prolonged thawing duration may result in more active growth of seedlings with enhancing water movement in stem, as refrigerated dormant seedlings started growing with thawing. These results suggest that the best thawing condition is thawing duration of less than 3 days before planting and opening package box in well-ventilated shady locations nearby plantation. The optimal thawing condition will improve the quality of seedling production in nursery stages and increase seedling growth performances in plantation stages. Keywords: Deforestation and forest degradation, Climate change ID: 3622374

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