Discusses the nature and cause of paralytic shellfish poisoning (PSP). Includes toxic dinoflagellate ecology, taxonomy and life history, and chemistry of the toxins. Recent work with trace metals and directions of future research are also given. (MA)

A perception of ecological psychology on urbanism is presented, with emphasis on the following premises: (1) Urban milieu consists of complexes of behavior settings; and (2) Size of a city should be understood in relationship to the number and variety of its settings, rather than in terms of population size. (Author/MA)

Nonpoint source pollution, water pollution not released at one specific identifiable point, now accounts for 50 percent of the nation's water pollution problem. Runoff is the primary culprit and includes the following sources: agriculture, mining, hydrologic modifications, and urban runoff. Economics, legislation, practices, and management of this…

Measures of the ecological characteristics of states were developed through factor analysis. Then ecological characteristics of states and cities were related to the geographic distribution of veterinarians and physicians. Population size is the strongest correlate of the number of health professionals. Results for pet veterinarians resemble…

Results of a five year study to measure the movement of sulfur pollutants across Europe found these pollutants move hundreds or thousands of kilometers before being deposited in large quantities in countries far from where they originate. The need for cooperation among countries to control sulfur pollutants is stressed. (Author/MA)

This article describes the methods used to clean up and preserve a lake for the use of the community as a recreational facility. (JD)

This paper distinguishes between two ecological perspectives on organizational evolution: population ecology, which limits investigation to evolutionary change in established populations, and community ecology, which focuses on the rise and fall of populations themselves as basic units of evolutionary change. These perspectives produce contrasting…

People living in neighborhoods where certain social classes are more prevalent will tend to have friends from that class. Even though individuals demonstrated strong preferences for certain kinds of friends, the neighborhood setting affected that choice. Friendships are formed by individual preferences operating within the boundaries of a social…

As oceanographic technology advances, the study of deep-sea environments is accelerating. Numerous ecological theories concerning deep-sea food relationships, environmental extremes, and life forms are changing as the environments of the deepest ocean trenches are studied. Thousands of new species are being discovered and studied constantly. (MA)

Discusses the importance of microorganisms in chemical pollution and pollution abatement. Selected chemical pollutants are chosen to illustrate that microorganisms synthesize hazardous substances from reasonably innocuous precursors, while others act as excellent environmental decontaminating agents by removing undesirable natural and synthetic…

Discusses some of the problems associated with solid waste disposal and the recovery and recycling of valuable resources found in materials that are discarded as waste. (JR)

Discusses the effects of radioactive wastes on marine communities, with particular reference to the fitness of populations and the need for field and laboratory studies to provide evidence of ecological change. (JR)

Discusses a wide range of topics related to the environmental crisis with particular emphasis on consequences for Australia. Suggests that Australian science teachers have both the opportunity and responsibility to play an active role in environmental education. (JR)

Offers a contemporary analysis of the interaction of man and the rest of the biota. Suggests that the dependence of man on nature is, more than the crisis of energy and world economics, the emergent scientific and political issue of the next years. (JR)