| Effects of atmospheric gases on terrestrial plants and critical levels of air pollution |
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| 作者姓名： | S.M.Semenov |
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| 作者单位： | Natural Environment |
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| 基金项目： | The report presented at the Fifth International Congress of Ecology (Japan, Yokohama, 23-30 August, 1990, Section S2-8-1). |
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| 摘 要： | An integrated approach was developed to determine the critical levels of air pollution for ecological standard setting based on the unified index of biological response, by taking into account the effects of all pollution components simultaneously. An empirical model of plant productivity was taken as the dose response model for gaseous pollutant effect on the productivity of trees and the annual productivity of plants was used as the above mentioned index. The CO2 increase in the lower atmosphere was considered to potentially increase plant productivity and NO2 was estimated as neutral while being dangerous for plants as a chemical precursor of ozone or as a source of acidification. The maximum permissible chronic O3 and SO2 levels for trees were estimated and it was found that O3 is much more phytotoxic, as compared to SO2 , with a rather narrow range of permissible levels (27-33 ppb) which complicates its monitoring and control.
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| 关 键 词： | air pollution biological responses terrestrial plants. |
| 收稿时间： | 4/4/1991 12:00:00 AM |
Effects of atmospheric gases on terrestrial plants and critical levels of air pollution |
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| S.M.Semenov.Effects of atmospheric gases on terrestrial plants and critical levels of air pollution[J].Journal of Environmental Sciences,1992,4(1):10-14. |
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| Authors: | SMSemenovNatural E nvironment and Climate Monitoring Laboratory Moscow Glebovskaya LAM |
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| Institution: | S.M.SemenovNatural E nvironment and Climate Monitoring Laboratory,Moscow 107258,Glebovskaya 206,LAM |
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| Abstract: | An integrated approach was developed to determine the critical levels of air pollution for ecological standard setting based on the unified index of biological response, by taking into account the effects of all pollution components simultaneously. An empirical model of plant productivity was taken as the dose response model for gaseous pollutant effect on the productivity of trees and the annual productivity of plants was used as the above mentioned index. The CO2 increase in the lower atmosphere was considered to potentially increase plant productivity and NO2 was estimated as neutral while being dangerous for plants as a chemical precursor of ozone or as a source of acidification. The maximum permissible chronic O3 and SO2 levels for trees were estimated and it was found that O3 is much more phytotoxic, as compared to SO2 , with a rather narrow range of permissible levels (27-33 ppb) which complicates its monitoring and control. |
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| Keywords: | air pollution biological responses terrestrial plants |
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