SalutationJournal of Aquatic Ecosystem Health - Tập 1 - Trang vi-vi - 1992
Recovery in complex ecosystemsJournal of Aquatic Ecosystem Health - Tập 6 - Trang 181-187 - 1998
Robert V. O‘Neill
Current ecosystem theory has a deceptively simple representation of recovery. In actual practice,recovery is affected by the frequency and extent of disturbances and by the spatial heterogeneity of the ecological system. Environmental changes may pass through thresholds causing recovery to a different plant and animal community. The sheer complexity of the system combined with unanticipated synerg...... hiện toàn bộ
Acid rain — perspectives on lake recoveryJournal of Aquatic Ecosystem Health - Tập 6 - Trang 207-216 - 1998
Wendel (Bill) Keller, John M. Gunn, Norman D. Yan
During the 1970‘s and 1980‘s, the acidification of surface waters by atmospherically deposited sulphur became a major international concern. Large sulphur emission control programs were implemented in Europe and North America with the expectation that many affected aquatic ecosystems would recover. Because of a variety of factors, these positive expectations have been slow to be realized. Only lim...... hiện toàn bộ
ObjectivesJournal of Aquatic Ecosystem Health - - 1993
Integrating effects of contaminants across levels of biological organization: an overviewJournal of Aquatic Ecosystem Health - Tập 7 - Trang 113-116 - 2000
William H. Clements
Effects of contaminants may occur at all levels oforganization, from molecular to ecosystem-levelresponses. While biochemical and physiologicalalterations in organisms may occur rapidly and areoften stressor-specific, the ecological relevance ofthese suborganismal indicators is uncertain.Alterations in populations and communities havegreater ecological relevance, but a firm mechanisticunderstandin...... hiện toàn bộ
Towards an ecological assessment of watercoursesJournal of Aquatic Ecosystem Health - Tập 2 - Trang 29-38 - 1993
A. Schneiders, E. Verhaert, G. D. Blust, C. Wils, L. Bervoets, R. F. Verheyen
Due to a fast decline in the ecological quality of watercourses combined with the threat of human functions, policy makers started to legislate water quality objectives for watercourses and to set up water purification programs. The description of universal quality objectives is too limited as a frame of reference and a policy only based on water quality cannot guarantee the goals of river restora...... hiện toàn bộ