This volume presents five years of research in the Northeastern and North Central United States by the U.S. Department of Agriculture Forest Service's Northern Global Change Program. This longterm research contributes to our understanding of the effects of multiples stresses on forest ecosystems over multiple spatial and temporal scales. The book provides sound ecological information for policy makers and land-use planners as well as for researchers in ecology, forestry, atmospheric science, soil science and biogeochemistry.

Zusammenfassung
Five years of research carried out by the U.S. Department of Agriculture Forest Services' Northern Global Change Program, contributing to our understanding of the effects of multiples stresses on forest ecosystems over multiple spatial and temporal scales.

Inhalt
Section 1. An Introduction to Northern U.S. Forest Ecosystems.- 1. Forest Resources and Conditions.- 2. Geologic and Edaphic Factors Influencing Susceptibility of Forest Soils to Environmental Change.- 3. Climate and Atmospheric Deposition Patterns and Trends.- 4. Forest Declines in Response to Environmental Change.- Section 2. Global Change Impacts on Tree Physiology.- 5. Interacting Effects of Multiple Stresses on Growth and Physiological Processes in Northern Forest Trees.- 6. Physiological and Environmental Causes of Freezing Injury in Red Spruce.- 7. Tree Health and Physiology in a Changing Environment.- 8. Atmospheric Deposition Effects on Surface Waters, Soils, and Forest Productivity.- Section 3. Ecosystem-Scale Interactions with Global Change.- 9. Nitrogen Saturation in Experimental Forested Watersheds.- 10. Effects of Soil Warming on Carbon and Nitrogen Cycling.- 11. Regional Impacts of Climate Change and Elevated Carbon Dioxide on Forest Productivity.- 12. Regional Impacts of Ozone on Forest Productivity.- 13. Effects of Climate Change on Forest Insect and Disease Outbreaks.- 14. Forest Responses to Changing Climate: Lessons from the Past and Uncertainty for the Future.- Section 4. Summary.- 15. Summary of Prospective Global Change Impacts on Northern U.S. Forest Ecosystems.