Journal of Aquatic Ecosystem Health
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Towards an ecological assessment of watercourses
Journal of Aquatic Ecosystem Health - Tập 2 - Trang 29-38 - 1993
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
An ecological risk assessment paradigm using the Spatially Integrated model for Phosphorus Loading and Erosion (SIMPLE)
Journal of Aquatic Ecosystem Health - Tập 3 - Trang 287-294 - 1994
Ecological risk assessments provide a probabilitistic approach to analyzing and predicting ecosystem responses to stress. We are evaluating the relationship between nonpoint source (NPS) phosphorus loading and the trophic status of the aquatic ecosystem. We are using SIMPLE (the Spatially Integrated Model for Phosphorus Loading and Erosion) to identify probable phosphorus sources in a watershed, s...... hiện toàn bộ
Ecosystem health as measured from the molecular to the community level of organization, with reference to sediment bioassessment
Journal of Aquatic Ecosystem Health - Tập 1 - Trang 319-328 - 1992
The current recognition that chemical measurements are uncertain indicators of biological consequences of pollution has shifted the emphasis away from assessing environmental chemistry alone toward the inclusion of measurements of the health of organisms. Effects of pollutants begin with the individual, have subsequent repercussions on population level processes, and ramifications for community st...... hiện toàn bộ
Provisional contents for part 2 of Stress in Marine Communities
Journal of Aquatic Ecosystem Health - Tập 7 - Trang 111-112 - 2000
Some new diatoms from Blakeney Point (Norfolk)
Journal of Aquatic Ecosystem Health - Tập 7 - Trang 88-102 - 1955
Automated biomonitors — first line of defense
Journal of Aquatic Ecosystem Health - Tập 3 - Trang 87-92 - 1994
Automated biomonitors operate on a real-time basis and utilize living organisms as the sensors. Traditionally, chemical monitors have been used to assess water quality. However, biological monitors respond to a greater number of toxic conditions. An overview of the various automated biomonitors, assessed by the types of biological sensors employed, is presented. The sensors used include bacteria, ...... hiện toàn bộ
Towards defining aquatic ecosystem health for the Great Lakes
Journal of Aquatic Ecosystem Health - Tập 1 - Trang 97-107 - 1992
The Canada — U.S. Great Lakes Water Quality Agreement defines Areas of Concern as geographic areas that fail to meet the general or specific objectives of the Great Lakes Water Quality Agreement where such failure has caused or is likely to cause impairment of beneficial use or the area's ability to support aquatic life. Impairment of beneficial use is defined by the Agreement as a change in the p...... hiện toàn bộ
Suitability of habitat for spawning lake trout
Journal of Aquatic Ecosystem Health - Tập 5 - Trang 153-175 - 1996
We provide further insight into the reproductive ecology and spawning requirements of lake trout. New comparative information about substrate characteristics, sediment transport, quality of interstitial water at spawning substrates, and the role of temperature in site selection and time of spawning is given for lakes Simcoe and Manitou (Ontario) and Seneca Lake (New York). Spawning lake trout comm...... hiện toàn bộ
Projecting population-level response of purple sea urchins to lead contamination for an estuarine ecological risk assessment
Journal of Aquatic Ecosystem Health - Tập 7 - Trang 177-185 - 2000
As part of an ecological risk assessment casestudy at the Portsmouth Naval Shipyard (PNS), Kittery,Maine, USA, the population level effects of leadexposure to purple sea urchin, Arbaciapunctulata, were investigated using a stage-classifiedmatrix population model. The model divided the lifehistory of A. punctulata into five classes,incorporating both, the developmental stages of thisspecies and the...... hiện toàn bộ
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