Impacts of Contaminants and Nutrients in Bleached Kraft Mill Effluent on Benthic Insect and Periphyton Communities PDF Download
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Author: Joseph M. Culp
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 94
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Book Description
Discusses results from artificial stream experiments in relation to the effects of effluent stressors and nutrient enrichment on benthic algal and invertebrate communities; also compares results from autumn 1993 and 1994 to document between-year variability in the relationships between effluent additions, and effects on primary and secondary producers. Results from spring 1994 are contrasted with those from autumn 1993 and 1994 to assess the importance of seasonal changes in moderating the nutrient-contaminant effects on benthic food web interactions. The artificial stream experiments were designed to decouple the effects on the riverine food web of the potentially confounding effects of nutrients and contaminants within effluent. By comparing the effects of nutrient and effluent treatments on different trophic components of the food web, the study was able to provide a mechanistic understanding of the stimulatory and/or inhihbitory effects of pulp mill effluents on the benthic food webs of the Athabasca River.
Author: Joseph M. Culp
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 94
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Book Description
Discusses results from artificial stream experiments in relation to the effects of effluent stressors and nutrient enrichment on benthic algal and invertebrate communities; also compares results from autumn 1993 and 1994 to document between-year variability in the relationships between effluent additions, and effects on primary and secondary producers. Results from spring 1994 are contrasted with those from autumn 1993 and 1994 to assess the importance of seasonal changes in moderating the nutrient-contaminant effects on benthic food web interactions. The artificial stream experiments were designed to decouple the effects on the riverine food web of the potentially confounding effects of nutrients and contaminants within effluent. By comparing the effects of nutrient and effluent treatments on different trophic components of the food web, the study was able to provide a mechanistic understanding of the stimulatory and/or inhihbitory effects of pulp mill effluents on the benthic food webs of the Athabasca River.
Author: Mark R. Servos
Publisher: CRC Press
ISBN: 1000725138
Category : Science
Languages : en
Pages : 724
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Book Description
In recent years, there have been emerging concerns regarding the fate and effects of pulp and paper mill effluents on the environment. Countries throughout the world are focusing attention on the implementation of regulatory and monitoring programs. In response, industry has begun to implement a variety of process and treatment technologies designed to minimize or eliminate the potential impacts. Environmental Fate and Effects of Pulp and Paper Mill Effluents explores the most active and critical current research and experimentation from around the world. This comprehensive overview examines the identity and origin of chemicals in pulp mill effluents, environmental fate of chemicals from pulp and paper mills, bioaccumulation of substances from pulp mills to fish and wildlife, field and laboratory studies of biochemical and whole organism responses associated with pulp and paper effluents, integrated monitoring and future research, and policy directions of this rapidly evolving field. Written by prominent scientists from around the world with contributions from industry, government, and academia, this important new book provides a balanced global perspective of the recent scientific findings and the challenges being faced in the immediate future.
Author: S. M. Swanson
Publisher: IWA Publishing
ISBN: 1843397072
Category : Science
Languages : en
Pages : 145
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Book Description
There is a pressing need for developing and testing a general set of theories in order to provide a confident basis for prediction of multiple stressor effects. Confident prediction is central to confident decision making in water pollution control. Consequently, WERF commissioned this study which has as its goal to provide a study design based on good science that helps establish a general, conceptual approach to multiple stressors. The objectives of the study are to develop a flexible and scientifically defensible conceptual model of the environmental effects of multiple stressors on river and stream ecosystems; develop a study design to test the conceptual model of multiple stressor effects; and, document the process used to arrive at the conceptual model. The multiple stressor conceptual model includes two main components: (1) a diagram that portrays the main features of the study team's understanding of how multiple stressors would interact and the nature of the effects; and (2) a series of three testable risk hypotheses. These two components follow the guidance provided by the U.S. EPA for ecological risk assessment. The proposed conceptual model encompasses the following key assumptions: interactions between the stressor and the ecosystem are dependant upon the existing baseline conditions; for each stressor/baseline combination there will theoretically be a functional and a structural response; effects on habitat are caused by structural or functional responses to stressors; and effects on habitat can cause structural or functional responses.
Author: Richard Bruce Lowell
Publisher: The Study
ISBN:
Category : Science
Languages : en
Pages : 40
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Book Description
Summarises research conducted to determine how the impacts of effluents produced by pulp mills and sewage plants in northern Alberta interact to potentially produce a variety of effects on downstream aquatic biota. The investigators carried out experiments in artificial streams using pulp mill and sewage effluent from a kraft mill on the Athabasca River near Hinton, Alberta. Using a 2x2 factorial design, mayflies were exposed to either low or high levels of effluent concentration, levels typical of what benthic invertebrates are likely to experience in some benthic microhabitats downstream of Hinton during the winter. Results of the two-week experiment are presented, including degree of mayfly survival for each of the effluent treatments.
Author:
Publisher:
ISBN:
Category : Aquatic sciences
Languages : en
Pages : 1272
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Book Description
Author: Mark S. J. Ouellett
Publisher:
ISBN:
Category : Aquatic ecology
Languages : en
Pages : 74
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Book Description
Lists Northern River Basins Study technical reports by issue number, subject, and geographic area studied. Subject areas used to classify the reports are: hydrology/hydraulics, nutrients/dissolved oxygen, contaminants, food chain, drinking water, other uses, traditional knowledge, and synthesis and modelling. Ten geographic divisions are used: three each for the Athabasca and Peace Rivers, and one each of the Wapiti/Smoky rivers, Peace-Athabasca Delta, Lake Athabasca, and Rivière des Rochers/Slave River.
Author: Northern River Basins Study (Canada)
Publisher:
ISBN:
Category : Athabasca River Watershed (Alta.)
Languages : en
Pages : 292
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Book Description
Report to the federal ministers of Environment and Indian & Northern Affairs, Alberta's Minister of Environmental Protection, and NWT's Minister of Renewable Resources. Summarises the main scientific findings of the Northern River Basins Study, which was established to examine the relationship between industrial, municipal, agricultural, and other development and the Peace, Athabasca, and Slave River basins. Reviews the characteristics of the northern river basins and their peoples, the organisation of the Study, and major findings in the areas of environmental overview, use of aquatic resources, traditional knowledge, flow regulation, fish distribution and habitat, nutrients, dissolved oxygen, contaminants, drinking water, ecosystem health, modelling, human health, and cumulative effects. Recommendations by the Study Board, First Nations, and scientific advisors regarding such issues as basin management, monitoring, research, public participation, and a successor organisation are then presented. Also includes a summary of opinions, suggestions, and recommendations expressed at 17 community workshops held throughout the northern river basins area.
Author: Patricia A. Chambers
Publisher: Canadian Government Publishing
ISBN:
Category : Nature
Languages : en
Pages : 132
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Book Description
Synthesises results from research and monitoring studies undertaken to characterise nutrient loading from all point and diffuse sources in northern Alberta river basins. Also evaluates the impacts of nutrient loading on river chemistry, assesses the response of riverine biota to nutrient loading from pulp mill and municipal effluents, quantifies nutrient responses of benthic biota, and investigates interactions between nutrients and contaminants in pulp mill effluents on food webs. The findings are used to assess the state of aquatic ecosystem health and to develop scientific and management recommendations for the northern river basins.
Author:
Publisher:
ISBN:
Category : Environmental chemistry
Languages : en
Pages : 812
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Book Description
Author:
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 2312
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Book Description
