Thematic report on effects (with special emphasis on combination stress)

摘要: Publisher Summary This chapter describes the Dutch Priority Programme on Acidification (DPPA) projects and focuses ecophysiological effects. The results of DPPA-III are presented in three thematic reports: deposition, combination stress, modelling. second theme, stress. In scope assessment damage caused by air pollution it is relevant to compare this with natural stresses like insect pests, fungal diseases, frost, drought nutrient deficiencies, understand interactions also relevant. Damage forests has not been quantified as yet. Both NH 3 O major pollutants Netherlands. Their effects were studied several experiments young trees. Based experimental evidence current concentration levels assumed reduce stomatal aperture, CO 2 assimilation biomass production, especially that roots. Reduced aperture may transpiration thus sensitivity. But other hand, a reduced root/shoot ratio result increased