Discusses various possible ways by which isolated populations might differentiate into species. The interactions between ecological factors and genes with respect to evolution and the role of genetic polymorphisms and other genetics variation are also discussed. (HM)

Discusses the relationship of adaptation to natural selection. Since natural selection does not always lead to adaptation, defining adaptation is sometimes a difficult task. (MA)

There are numerous bird species that will nest only in dead or dying trees. Current forestry practices include clearing forests of these snags, or dead trees. This practice is driving many species out of the forests. An illustrated example of bird succession in and on a tree is given. (MA)

Discussed is the biological succession of a lake beach to a hardwood climax forest. The narrative is illustrated with numerous full color photographs. (MA)

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 experiment explored the applicability of naturalistic methods of ecological psychology to the study of teacher behavior. Some differences were found between teachers who had been identified as effective or ineffective. The ecological methodology is thought to be a fruitful one for the study of teacher effectiveness. (Author/JKS)

Disputed is the contention of P. Brooks and A. Baumeister (EC 092 551) that most mental retardation research is unsound due to insufficient attention to ecological factors. (BB)

Franklin County, Ohio, is utilizing new techniques in a program of natural area management, which can be used in any metropolitan park area. (SK)

Reviews the early development of the ecological psychology program at Michigan State University and describes the changes it has undergone, the traumas it has endured, and considers its present state of mental, physical, and fiscal health. (Author/AM)

This paper provides psychological and sociological substance to Kurt Lewin's conceptions of topological territories. (Author/AM)

Examines progress made on environmental issues of international concern since the Stockholm Action Plan was formulated in 1972. Focuses on the activities of the United Nations Environment Program which will soon begin its Earthwatch program and International Referral System. (JR)

Article tells how a visit to a game refuge inspired students to create songs about their experience. (GB)

The chairman of the President's Council on Environmental Quality outlines the administration's environmental program. (MF)