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Inhaltsangabe1. Introduction.- 2. Background on Research Sites and Methods.- Site Descriptions.- Protocols.- 3. Water Balances.- Site Characterizations.- Model Description and Parameterization.- Simulation Results and Discussion.- Summary.- 4. Patterns of Tropospheric Ozone in Forested Landscapes of the Integrated Forest Study.- Methodology.- Patterns of Ozone in the Integrated Forest Study.- Physiological and Ecological Role of Ozone.- Summary.- 5. Sulfur Chemistry, Deposition, and Cycling in Forests.- Overview.- Atmospheric Deposition and Canopy Interactions of Sulfur.- Sulfur Distribution and Cycling in Forest Ecosystems.- Retention or Loss of Sulfur for IFS Sites and Evaluation of Relative Importance of Processes.- Analysis of Selected Sulfur Cycles in Polluted versus Unpolluted Environments.- Summary and Conclusions.- 6. Nitrogen Chemistry, Deposition, and Cycling in Forests.- Overview.- Atmospheric Deposition and Canopy Interactions of Nitrogen.- Experimental Laboratory Measurements of Reactive N Gas Deposition to Forest Landscape Surfaces: Biological and Environmental Controls.- Nitrogen Distribution and Cycling.- Retention or Loss of N in IFS Sites and Evaluation of Relative Importance of Processes.- Analysis of N Cycles in Polluted versus Unpolluted Environments.- Conclusions.- 7. Relationships among N, P, and S in Temperate Forest Ecosystems.- Data Analysis.- Relationships in Living Vegetation.- Canopy Processes.- Changes During Organic Matter Decomposition.- Organic Relationships in Mineral Soils.- Inorganic Interactions in Mineral Soils.- Case Study: Effect of Short-Term N Accumulation.- Ecosystem Inputs and Outputs.- Summary and Conclusions.- 8. Base Cations.- Atmospheric Deposition and Throughfall Fluxes of Base Cations.- Canopy Interactions of Ca2+, Mg2+, and K+.- Base Cation Distribution and Cycling.- Summary and Conclusions.- 9. Cation Exchange and A1 Mobilization in Soils.- Cation Exchange Reactions in Acid Forested Soils: Effects of Atmospheric Pollutant Deposition.- Evidence of Historical Influences of Acidic Deposition on Wood and Soil Chemistry.- 10. Mineralogy and Mineral Weathering.- Site Characteristics.- Mineral Weathering at the IFS Sites.- Observations from the Rhizosphere.- Summary.- 11. Processing of Acidic Deposition.- Atmospheric Deposition of Acids.- Canopy Interactions.- Summary of Acid Deposition and Canopy Interactions.- H+ Budgets.- 12. Recovery from Acidification.- IFS Case Study.- Acidification.- Recovery from Acidification.- Summary and Conclusions.- 13. Regional Evaluations of Acid Deposition Effects on Forests.- Eastern Spruce-Fir.- Eastern Hardwoods.- Southern Pines.- European Forests.- 14. Synthesis and Modeling of the Results of the Integrated Forest Study.- and Acknowledgments.- Summary and Synthesis of the Integrated Forest Study.- The Nutrient Cycling Model (NuCM): Overview and Application.- Appendix: Nutrient Flux and Content Data from the Integrated Forest Study Sites.