Provides an overview of the research topics which were addressed in the three different phases of the Dutch Priority Program on Acidification (DPPA), executed between 1985 and 1994. This book is of interest to those involved in research related to acidification and eutrophication.

In the appendices of the book, so-called umbrella theme reports on deposition, stand modelling and effects on forests are presented which describe in more detail the scientific work performed in the third phase of the DPPA. This book will be of interest to anyone involved in research related to acidification and eutrophication; i.e., not only those who perform the research in the causal chain from emissions to effects, but also policy-makers and students.

Foreword. Abridged summary. Introduction (G.J. Heij). The first two phases of the Dutch Priority Programme on Acidification (DPPA). The third phase of the DPAA. Organizational and financial aspects of DPPA-III. The content of the final report. References. Emission, concentration and deposition of acidifying substances (J.W. Erisman, A. Bleeker). Introduction. Emissions. Concentrations. Depositions. Source contributions and origin of the deposition. Relations between atmospheric deposition and throughfall. Uncertainties. Deposition originating from natural sources and comparison of the Dutch situation with other European countries. Conclusions and gaps in current knowledge. References. Effects on forest ecosystems (L.J. van der Eerden). Introduction. Laboratory-scale manipulation experiments. Effects at stand scale. Effects at regional scale. Effects on other biotic components of the forest ecosystem. Critical levels and critical loads. Discussion. Conclusion. References. Effects of atmospheric deposition on non-forest ecosystems in The Netherlands (R. Bobbink, J.G.M. Roelofs , J.M. Verstraten). Introduction. Terrestrial ecosystems. Aquatic ecosystems. Critical loads. References. Summary and conclusion (G.J. Heij). Trends in emissions, concentrations and depositions. Effects on forest ecosystems. Effects on non-forest ecosystems. Curative measures. Evaluation and synthesis.