Without exception the papers are well and atttractively written and together constitute an important and stimulating contribution to the modern science of ecology. -NATURE This series should certainly serve as an effective means of keeping abreast of the major advances in this challenging and growing field. -PHYTOLOGIA This volume contains papers highlighting the diverse interests of modern ecologists. All areas of ecology are covered: from the current concerns over changes in CO2 levels and its affects on the Earth's vegetation to the unique Cichlid fish populations in Lake Tanganika, whose structure is important for other organismal populations, including humans. Other theoretical and applied ecological studies are also discussed, making this volume essential for all ecologists.