着生植物の大気汚染指標性について
汚染物質とIAP値との相関性
1978 年 13 巻 1 号 p. 26-32
詳細
1978 年 13 巻 1 号 p. 26-32
Recently, epiphytic bryophytes and lichens became to used as an indicator of atmospheric pollution, because they are apparently more sensitive to air pollutants than other plants.
In the present investigation, the epiphytic bryophyte and lichen vegetation on trees were investigated in the Eastern Harima region of Hyogo Prefecture, and the correlation between air pollutants and the epiphytic vegetation was analysed by using multiple regression analysis.
It is seemed that the atmospheric pollution based on the Index of Atmospheric Purity (IAP values) which was calculated from the frequency, coverage, density and fertility of epiphytic species (De Sloover and LeBlanc, 1968) is generally correlated with the SO2 isopleths with exception of some areas in the investigated region.
Multiple regression analysis was attempted to make clear the correlation between the IAP values and such influential factors as concentration of SO2, concentration of soluble matters in rain water and dryness of habitation for epiphytic vegetation. As the consequence, it was found that concentration of SO2 and soluble matters in rain water have combined effects on them, the later was more influential than the former.
On account of the facts mentioned of above, it was considered that the IAP values were an useful combined pollution index for the total air pollution.
