This study investigated the association between the nature of parent-caregiver relationships and child behavior and examined the parent-caregiver relationship as a social support. A total of 120 parents of 2-year-olds who used child care at least 20 hours a week were randomly selected. Participants were asked to complete a survey that included a…

This article defines some troublesome facts about the use of energy, organizes the major issues, reviews some alternative sources of energy, provides ideas for classroom use, and lists references and materials on the subject. (RC)

The effect that pesticides can have on natural ecosystems is discussed. Specific examples are drawn from microbial ecosystems in estuarine regions. (DT)

This booklet presents a unified perspective of natural and human systems. The problems of contemporary civilization are analyzed in terms of the interrelationships among energy, food, evolution, population, community, interactions, and balance. The authors' philosophy emphasizes that all life depends on the balance between natural systems and…

A panel of 37 experts predicted trends in the use of newsprint by the year 2000. The panelists agreed that as a result of increasing education, worldwide demand for newsprint will continue to increase, with consumption exceeding 35 million short tons a year in 2000, compared with 10 million in 1950 and 22 million in 1970. The type of paper desired…

Evidence of high population density's serious inhibiting effects on the reproductive, aggressive, withdrawal and sexual behavior of various animals, motivated a study of human pathology in overcrowded areas. Ecological relationships in Chicago and their impact on human behavior were assessed. The number of persons per acre, Standardized Mortality…

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)