남해안 주요 도서 곰솔림에 미치는 산성강하물의 영향

Abstract

This study was conducted to provide basic data for the study of the islands by analyzing the components of acidic depositions entering forests around major islands on the south coast and investigating the decline of bear soles to determine the impact of acid depositions on trees. The acidity of the throughfall in Pinus thunbergii forests was the lowest in the spring season with pH 4.98 and the fall season with pH 5.02. Of the throughfall in the island area, the southern coast survey district had the highest NO3-, with 47.28mg/L and 46.22mg/L, respectively. SO42- was the highest concentration in Namhae with an average of 58.47mg/L, followed by Namhae with 2.0 times higher concentration than in the control area, followed by Tongyeong. The Mg2+ had 16.23mg/L and 16.29mg/L, respectively, with the highest concentration of the Southern coastal survey district by region and 2.1 times higher than the control area. Next, the measurements were similar in Geoje and Tongyeong. The concentration of Ca2+ was 30.27mg/L and 29.45mg/L, respectively, with 15.92mg/L and 16.02mg/L at control area, respectively. By region, Namhae survey district had the highest concentration and 1.9 times higher than the control area. Next came Geoje, followed by the Tongyeong survey district. As a result of analyzing the chlorophyll content of Pinus thunbergii forests in the island areas, Geoje district had the highest level, and Namhae district had the lowest level of 0.2987mg/g. The concentrations of SO2 and NO2 in the Pinus thunbergii forests in the island areas were 0.051 ppm and 0.063 ppm, 0.049 ppm and 0.062 ppm in the fall, respectively, while the concentration of NO2 was 1.7 times higher in the spring and 1.5 times higher in the fall, respectively. The degree of decline in the island research site, Pinus thunbergii forests, was 2.10, Tongyeong survey district 1.80 and Namhae survey district 3.27 and control area 1.40. Namhae, which has the highest degree of decline, was found to be 2.9 times higher than the control area, followed by Geoje and Tongyeong was the lowest, similar to the control area. The correlation analysis of the factors effect the decline of the Pinus thunbergii forests was that the rainfall acidity was correlated (r=-0.8773), the concentration of SO2 in the atmosphere was correlated (r=0.8946), and the concentration of NO2 was correlation (r=0.8832). Correlation between acid precipitates was at 1% level for pH (r=-0.8773), NO3- (r=0.847), SO42- (r=0.847) ions, SO2 (r=0.8932), NO2 (r=0.8932), and chlorophyll content (r=9628). The most effect variable was pH, which was 78% explanatory. The regression equation for factors effect the decline of the Pinus thunbergii forests was estimated to be Y = 4.8578 + 0.7820X2 + 0.8533X5 + 0.8698X11 + 0.8788X12 + 0.8901X6 (r2=0.8934). Here, X2 was pH, X5 was SO42-, X11 was SO2, X12 was NO2 and X6 was NO3-, which was 89%.