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DocumentEfficiency of total volatile organic compound of climbing plants Ardisia pusilla and Ficus pumila
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.This study was conducted to analyze removal efficiency of total volatile organic and physiological responses of climbing native plants Ardisia pusilla and Ficus pumila. The Hedera helix as a control, plants were investigated the total volatile organic compounds and their corresponding physiological responses with the maximum quantum yield of PSII (Fv/Fm)chlorophyll fluorescence, the vegetation index (the normalized difference vegetation index, NDVI; the simple ratio, SR; the carotenoid reflectance index 1, 2; CRI 1, 2) and physiological activity (the flavonoids and the phenolics). As a result, the removal amount of native plants tended to be lager than Hedera helix (2.973mgm-3h-1m-2 leaf area) and Ficus pumila (4.481mgm-3h-1m-2 leaf area) had more removal than Ardisia pusilla (3.786 mgm-3h-1m-2 leaf area), significantly. The NDVI, SR, and CRI 1, 2 of Ficus pumila and Hedera helix decreased after 2 hours, but there was no difference before and after with pollutants in Ardisia pusilla. In addition, only Ardisia pusilla had the normal range of 0.78 to 0.84 with Fv/Fm. Through this result, it is judged Ardisia pusilla is normally metabolized in plants without negative effects when removing indoor pollutants. Additionally, Ardisia pusilla did not change about phenolic, but the flavonoids contents increased after 2 hours. The physiological activity of Ficus pumila increased from 4 hours and then dereased again at 6 hours. Therefore, the removal of total volatile organic compounds was effective in the Ficus pumila, Ardisia pusilla, Hedera helix order, but in the results of stress and physiological activity of plants after air purification, Ardisia pusilla maintained a normal range than other plants and increased antioxidants. It is considered to be highly useful as an air purification plant due to its low damage. Keywords: Human health and well-being, Climate change, Covid-19, Research, Landscape management ID: 3622900 -
DocumentThe effects of visit characteristics in urban forest on the individual life satisfaction
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Recently, the importance and effectiveness of the urban forest have been increasing with the quality of life of urban residents. Therefore, the study aims to understand how people use the forest for recreation and determine how the visit characteristics of the urban forest affect Individual Life Satisfaction (ILS). A nationwide survey (n=8,254) was conducted on the visit frequency, proximity to the forest and life satisfaction. To measure ILS, three questions (personal, relative, collective) of COMOSWB (Concise Measure of Subjective Well-being) developed by Seo et al (2011) are used. The analysis shows that people usually visit the forest within 10~30 minutes distance (31.8%) on a weekly basis (24.2%), by walk (41.4%) for exercise (41.0%) and relaxation (32.9%). As a result of the hierarchical analysis between visit characteristics and ILS with controlling demographic variables; the ‘frequency of forest visits (t=4.50**)’ and ‘proximity to the forest (t=2.764**)’ has a positive effect on ILS. In particular, ‘frequency of forest visits(β=0.056)’ has higher level of influence than that of ‘proximity to the forest (β=0.034)’ on ILS. In other words, frequent visits to forests far away from the place of residence can improve individual life satisfaction." The significance of this study is that it statistically determines that the frequency of forest visits and the proximity to the forest are important factors for ILS. Future studies should take into account the various qualitative factors of forest visitation such as vegetation, quantity and types of forest so that it will be possible to contribute to setting up a direction for urban forest development and management. Keywords: Human health and well-being ID: 3484619 -
DocumentThe interaction between particulate matter (PM) adsorption and leaf gas exchange characteristics of urban trees exposed to fly ash
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Because of their vast surface distribution, external particle reactivity, and leaf characteristics, urban trees can contribute as biofilters, reducing PM pollution. Leaves of trees permit PM to be accumulated, depending on their leaf traits. The impacts of several leaf characteristics on PM accumulation capabilities, such as surface roughness and leaf morphology, have been studied. The change in relative humidity (RH) caused by leaf gas exchanges of urban trees also can be highly related to the removal efficiency of PM because the hygroscopic growth of particle is closely related to PM deposition. Nevertheless, the impacts of leaf gas exchange parameters including stomatal conductance and transpiration rate on PM deposition ability still remain unidentified. The effects of PM pollution on urban plants’ photosynthesis are also not well understood. In this study, we analyzed the correlation between PM accumulation and photosynthesis (Pn), stomatal conductance (gs) and transpiration (Tr) of all the tested urban trees under approximately 300 μg/m3 of fly ash emitted condition and evaluated the increased effect of leaf gas exchange parameters on PM deposition. We also studied whether the inhibiting impacts on the ability of leaf gas exchange is occurred by the blockage and closure of the stomata by using scanning electron microscopy (SEM). The purpose of our research was to better understand the interaction between particulate matter (PM) adsorption and leaf gas exchange characteristics of urban trees. Furthermore, the findings of this study can be used to provide scientific data about the suitability of tree species for urban forests. Keywords: Research, Climate change, Sustainable forest management ID: 3623026
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