Charles T. Driscoll

Knowledge in the field of acidic deposition is expanding rapidly, and both ex­ perts and non-experts are challenged to keep up with the latest information. We designed our assessment to include both the basic foundation needed by non­ experts and the detailed information needed by experts. Our assessment in­ cludes background information on acidic deposition (Chapter 1), an in-depth discussion of the nature of soil acidity and ecosystem H+ budgets (Chapter 2), and a summary of rates of deposition in the Southeastern U. S. (Chapter 3). A discussion of the nature of forest soils in the region (Chapter 4) is followed by an overview of previous assessments of soil sensitivity to acidification (Chapter 5). The potential impacts of acidic deposition on forest nutrition are described in the context of the degree of current nutrient limitation on forest productivity (Chap­ ter 6). The results of simulations with the MAGIC model provided evaluations of the likely sensitivity of a variety of soils representative of forest soils in the South (Chapter 7), as well as a test of soil sensitivity criteria. Our synthesis and recommendations for research (Chapter 8) also serve as an executive summary. A complementary volume in the Springer-Verlag Ecological Studies series should be consulted for information on European forests. This volume, Acidic Deposition and Forest Decline in the Fictelgebirge, edited by E.-D. Schultze and O. L. Lange, also provides greater detail on the physiologic responses of trees than we present in our regional assessment.

Acid rain has changed the face of the Adirondacks, created political tensions between the Northeast and the Midwest, and served as both a harbinger of global climate change and a "fire drill" for public- and private-sector responses to environmental crises. The history of acid rain research is a striking case in which a large-scale and long-term environmental problem was addressed in part through scientifically motivated changes in public policy. In the 1970s, acid rain was viewed as a simple problem that was limited in scope and characterized by "dead," fishless lakes. Scientists now have broader insights into the processes by which acid rain sets off a cascade of adverse effects in ecosystems as its components move through air, soil, vegetation, and surface waters. Written and designed to appeal to both scientists and lay readers, this book is a landmark example of scientific communication that provides a comprehensive scientific history of the phenomenon, from its discovery to the full understanding of the scope of its effects and the ultimate responses that have mitigated some of the damage to the region's lakes and forests. Published in association with the Adirondack Lakes Survey Corporation with the support of the Wildlife Conservation Society, United States Environmental Protection Agency, New York State Department of Environmental Conservation, and New York State Energy Research and Development Authority.