From The Book's Cover: Ecological diversity has been and area of increasingly intensive studies in the past two decades. This book is the first that deals solely with the subject in an authoritative and comprehensive fashion. Dr. Pielou deals with, for example: indicies of diversity and evenness; problems of estimation and census; hierarchal diversity; species abundance distributions and two kinds of explanatory model; resource-apportioning models and statistical models; the pattern of mosaics; competition on gradients; beta diversity; zonation; the ecological niche; species packing; coexistence of competitors; niche width and niche overlap; the influence of spatial heterogeneity; stable and unstable communities; latitudinal gradients; island diversity; diversity charges throughout geological time. The author emphasizes how theoretical ecology is splitting into mathematical ecology and statistical ecology, each field tending to go its own way; each, she points out, has drawbacks. And the split implies dangers to the development of ecology as a unified science. This authoritative book will be indispensable to biologists, mathematicians, statisticians and students involved in any aspect of ecology.