Microbes, Sediments, and Acidified Water: The Importance of Biological Buffering. Effects of Lake Acidification on Microbial Populations and Processes. Biogeochemical Cycling of Organic Matter in Acidic Environments: Are Microbial Degradative Processes Adapted to low pH? Microbial Biogeochemical Processes in a Naturally Acidic Wetland, The Okefenokee Swamp. Sulfur Biogeochemistry of an Acidic Lake in the Adirondack Region of New York. Epilithic Microbial Populations and Leaf Decomposition in Acid Stressed Streams. Algal Assemblages in Acid Stressed Lakes with Particular Emphasis on Diatoms and Chrysophytes. Diatom Stratigraphy in Acid Stressed Lakes in The Netherlands, Canada, and China. Protozoan Bacterivory in Acidified Waters: Methods of Analysis and the Effect of pH. Index.