In today's chemical-oriented society, any student of ecology must be cognizant of the potential for environmental toxicants to alter the balances and relationships among the plants, animals and biogeochemical cycles in an ecosystem. 'Ecotoxicology: Problems and Approaches' provides a well-balanced overview of the subject that would be useful for specialists in ecotoxicology or in related applied ecology disciplines and as a supplementary text for graduate-level courses in ecology. (Copyright (c) Wildlife Disease Association 1990.)