Applies mathematical models to the concepts of ecological dominance and ecological niche. Considers niche width, the addition of new species to a community, and the evolution of dominant and subordinate species within a community. Analyzes data from other studies to support the models. (EB)

While harboring valuable species, natural areas also serve as bench marks in evaluating landscape change. (Editor/AL)

Research report on the severe ecological consequences of the defoliation program by American military forces in Vietnam. A significant fraction of mature trees in most forests are killed by single application of herbicides and almost completely killed by repeated sprayings. AAAS is urged to set up an international research program on the…

The reduction of stresses will permit the habitat and biota to recover many of their more desirable characteristics. (DF)

Describes Project Tektite 1, during which a team of four scientists spent 60 days approximately 15 meters beneath the surface of the sea. Describes the "habitat" in which the men lived, reports biological and geological research carried out, and concludes that this research method has many advantages and potentialities. (EB)

Presents a physical description of a geothermal power plant, details the chemical and thermal effluents, and evaluates the physical and ecological effects of the plant. (GS)

This article is directed to provoking thought on how to attain economic and social objectives while using fewer energy sources. (DF)

Describes the four week Westinghouse School for Environmental Management, attended by executives of public and private power utilities. The school provided a comprehensive course in environmental problems with an emphaiss on the relation of power production to the environment. (EB)

Advocates the establishment of a permanent United States Planning Board to formulate long-range directions for the U.S. This will help achieve ecolibrium: balance in our earthly home." (AL)