Interactions between organisms and their biotic and abiotic environments will be explored through lecture, laboratory, and field study. Factors affecting organisms at the population, community, and ecosystem levels will be emphasized. The patterns of occurrence of organisms in different habitats, and the processes contributing to biodiversity will be explored. Examples will be drawn from marine and terrestrial habitats. Field work will include field trips to a variety of habitats to sample and characterize fauna and flora. Fundamentals of experimental design, sampling, field techniques, and data analysis will be stressed. Includes one three-hour laboratory per week and weekend field trips to be arranged.