Combined effects of simulated acid rain and other environmental factors on asian trees

Abstract

We summarized the results obtained from experimental studies on the combined effects of concurrent or sequential exposure to simulated acid rain, mist, or fog, and ozone, on the growth and physiology of Japanese and Chinese tree species. Based on the limited number of studies conducted in Japan and China, we found that the combined effects of acid precipitation and ozone on Japanese and Chinese tree species were additive or greater than additive. Moreover, there is a possibility that acid precipitation with a relatively low acidity increased the extent of ozone-induced inhibition of assimilate translocation from the shoot to roots, and this ozone effect on trees exacerbated by acid precipitation may be associated with nitrate input from precipitation.