1. Introduction --; 2. Robert H. Whittaker 1920-1980: The man and his work. (48:97-122) --; I Community analysis --; 3. New approaches to direct gradient analysis using environmental scalars and statistical curve-fitting procedures. (55: 11-27) --; 4. An analysis of species response curves and of competition from field data: some results from heath vegetation. (48: 175-185) --; 5. Species performances and vegetation boundaries along an environmental gradient. (52: 141-150) --; 6. On choosing a resemblance measure for non-linear predictive ordination. (54: 27-35) --; II Compositional gradients --; 7. Xeric Mediterranean-type shrubland associations of Alta and Baja California and the community/continuum debate. (52: 3-19) --; 8. A numerical analysis of the regional and local variation in North American tall-grass prairie vegetation: structure and composition. (57: 65-78) --; 9. Distributions of C4 plants along environmental gradients in southeastern Arizona. (52: 21-34) --; 10. Gradient analysis of the vegetation of the Byron-Bergen swamp, a rich fen in Western New York. (53: 85-91) --; 11. Vegetation patterns related to environmental factors in a Negev Desert watershed. (54: 153-165) --; III Community dynamics --; 12. Disturbance and vegetation response in relation to environmental gradients in the Great Smoky Mountains. (55: 129-139) --; 13. Vegetation of the Santa Catalina Mountains: Community types and dynamics. (58: 3-28) --; 14. Patterns of tree replacement: canopy effects on understory pattern in hemlock --; northern hardwood forests. (56: 87-107) --; IV Species diversity --; 15. Measuring compositional change along gradients. (54: 129-141) --; 16. A new approach to the minimal area of a plant community. (50: 71-76) --; 17. Plant species richness at the 0.1 hectare scale in Australian vegetation compared to other continents. (52: 129-140) --; 18. Diversity relations in Cape shrublands and other vegetation in the southeastern Cape, South Africa. (54: 103-127) --; 19. Coexistence of plant species with similar niches. (58: 29-55) --; 20. Composition and species diversity of pine --; wiregrass savannas of the Green Swamp, North Carolina. (55: 163-179) --; 21. Diversity models applied to chalk grasslands. (57: 103-114).