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In recent times, the science of ecology has been rejuvenated and has moved to a central position in biology. This volume contains eighteen original, major contributions by leaders in the field, all associates of the late Robert MacArthur, whose work has stimulated many of the recent developments in ecology. The intellectual ferment of the field is reflected in these papers, which offer new models for ecological processes, new applications of theoretical and quantitative techniques, and new methods for analyzing and interpreting a wide variety of empirical data.

The first five...

Professor Cody's monograph emphasizes the role of competition at levels above single species populations, and describes how competition, by way of the niche concept, determines the structure of communities. Communities may be understood in terms of resource gradients, or niche dimensions, along which species become segregated through competitive interactions. Most communities appear to exist in three or four such dimensions. The first three chapters describe the resource gradients (habitat types, foraging sites, food types), show what factors restrict species to certain parts of the...