Discusses the ways in which aquaculture can be a cost-effective wastewater treatment alternative. Fifteen strategies were selected as being appropriate and technologically feasible wastewater treatment systems to compare for the size of community under consideration. Costs for each stage of each strategy were estimated and compared. (Author/MA)

This paper looks in detail at the "natural" causes of extinction as compared to the "technological" causes of extermination (abrupt niche-emptying), using examples of species that are both extinct and exterminated. Ways are suggested that can put a halt to extermination. (BT)

Eco-Inquiry may be defined as a "whole science" curriculum that embeds hands-on science within thematic multi-dimensional learning experiences. Three modules for the upper elementary and middle grades focus on food webs, decomposition, and nutrient cycling. Each module lasts 4-7 weeks and may be used alone or in sequence. Student…

Discusses seals in terms of their classification, ecological influences, their pelage, moult and thermoregulation, respiratory and vascular systems, predation and mortality. (JR)

In this third special educational supplement, the swamp is discussed. Included is information on where land and water meet to form the great incubator of wildlife, and on endangered species of wildlife, such as the red wolf, brown pelican, manatee, great white heron and woodstork. (BT)

Presents mathematical models appropriate to describing and analyzing competitive interactions in an ecological system. (MA)

Briefly surveys recent trends and developments in sedimentology. Includes Clastic sedimentary petrology, petrology of argillaceous rocks, terrigenous depositional environments, and chemical sedimentology. (MA)

Describes major desert aquatic habitats, including descriptions of environmental conditions characteristic of these areas and the adaptations of desert aquatic organisms to them. (CS)

Describes a systems approach from an ecological perspective for teaching the idea of a species and the notion that being a successful species involves being able to overcome certain general problems that must be solved by all species. (PR)

Describes a simple way to demonstrate the principles involved in a drinking water plant. This demonstration developed for a general public lecture can be used in chemistry and biology courses for an ecological and environmental emphasis. (HM)

A description of ecosystem science is presented along with some suggestions for its institutionalization and some projections on its future. Also the future of ecosystems and the possible impact of that future on biology and ecology teaching is discussed. (MR)