Contents: The Direct Effects of Increase in the Global Atmospheric Carbon Dioxide Concentration on Natural and Commercial Temperate Trees and Forests, D Eamus and PG Jarvis. On the Evolutionary Pathways Resulting in Photosynthesis and Crassulacean Acid Metabolism (CAM), RK Monson. Dendroecology: A Tool for Evaluating Variations in Past and Present Forest Environments, HC Fritts and TW Swetnam. Community Structure and Interaction Webs in Shallow Marine Hard-Bottom Communities: Tests of an Environmental Stress Model, BA Menge and TM Farrell. Herbivores and Plant Tannins, EA Bernays, G Cooper-Driver and M Bilenger. General Ecological Principles which are Illustrated by Population Studies of Uropodid Mites, F Athias-Binche.