Record Display for the EPA National Library CatalogRECORD NUMBER: 8 OF 18
|Main Title||Overview of Case Studies on Recovery of Aquatic Systems from Disturbance.|
|Author||Niemi, G. J. ; DeVore, P. ; Detenbeck, N. ; Taylor, D. ; Lima, A. ;|
|CORP Author||Environmental Research Lab.-Duluth, MN. ;Minnesota Univ.-Duluth. Natural Resources Research Inst. ;Washington Univ., Seattle. Center for Streamside Studies.|
|Additional Subjects||Aquatic ecosystems ; Environmental impact assessments ; Recovery ; Water pollution effects ; Case studies ; Freshwater ; Site surveys ; Long term effects ; Quality assurance ; Biological effects ; Chemical compounds ; Flooding ; Dredging ; Drought ; Lumbering ; Reprints ;|
An extensive review of the published literature identified more than 150 case studies in which some aspect of resilience in freshwater systems was reported. Approximately 79% of systems studied were lotic and the remainder lentic. Most of the stressor types were chemical with DDT (N = 29) and rotenone (N = 15) the most common. The most common nonchemical stressors were logging activity (N = 16), flooding (N = 8), dredging (N = 3), and drought (N = 7). Based on these criteria, all systems in these studies seem to be resilient to most disturbances with most recovery times being less than three years. Exceptions included when (1) the disturbance resulted in physical alteration of the existing habitat, (2) residual pollutants remained in the system, or (3) the system was isolated and recolonization was suppressed.