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DocumentEffects of drought stress and nitrogen fertilization on growth and physiological characteristics of Pinus densiflora seedlings under elevated temperature and CO2 concentrations
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Pinus densiflora is the most widely distributed tree species in South Korea. Its ecological and socio-cultural attributes makes it one of the most important tree species in S. Korea. In recent times however, the distribution of P. densiflora has been affected by dieback. This phenomena has largely been attributed to climate change. This study was conducted to investigate the responses of growth and physiology of P. densiflora to drought and nitrogen fertilization according to the RCP 8.5 scenario. A Temperature Gradient Chamber (TGC) and CO2- Temperature Gradient Chamber (CTGC) were used to simulate climate change conditions. The treatments were established with temperature (control versus +3 and +5°C; aCeT) and CO2 (control: aCaT versus x1.6 and x2.2; eCeT), watering (control versus drought), fertilization (control versus fertilized). Net photosynthesis (Pn), stomatal conductance (gs), biomass and soil water content (SWC) were measured to examine physiological responses and growth. Relative SWC in aCeT significantly decreased after the onset of drought. Pn and gs in both aCeT and eCeT with fertilization were high before drought yet decreased rapidly after 13 days under drought. The fastest mortality showed in aCeT but the longest survival was observed in eCeT. Total and partial biomass (leaf, stem and root) in both aCeT and eCeT with fertilization were significantly high, but significantly low in aCeT. The results of the study are helpful in addressing P. densiflora vulnerability to climate change by highlighting physiological responses related to carbon allocation under differing simlulated environmental stressors. Keywords: Climate change ID: 3621653 -
DocumentMid-term demographic dynamics in stem exclusion stage of beech forest in Ulleungdo Island, South Korea
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Long-term observation on forest development processes after various disturbances provides the baseline information such as management options including restoration. We examined changes in forest structure and function and patterns of demographic rates (2009-2019) in young beech forest in Ulleungdo Island, South Korea. Change in mean stem density revealed bell-shaped form and growth rate in mean above ground biomass decreased. By predominant stem density and biomass, beech population exhibited strong influence for whole community patterns. Size distributions of tree community revealed influences from maturity and restrained recruitment of trees. Demographic rates showed interesting patterns because recruitment (from 1.3 in to almost 0) and mortality rates (from 0 to 1.8) have abrupt turnover in 2015. Disturbance events from soil deposition originated by heavy rains after 2017 increased stochastic events of tree death (from 0 to 15%). Our results suggest that in stem exclusion stage there were dramatic turnover between stem recruitment and mortality. In addition, disturbance events have influenced to demographic rates by increasing stochastic tree motality. Keywords: Biodiversity conservation ID: 3622286 -
DocumentType 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
2022Also available in:
No results found.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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