Author: Garry J. Scrimgeour
Publisher: The Study
ISBN:
Category : Nature
Languages : en
Pages : 64
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Book Description
Understanding the effects of nutrients on the aquatic environment will be critical for managing industrial and municipal effluent discharges in northern Alberta rivers. One objective of this study was to identify spatial patterns of nutrient limitation in the Wapiti-Smoky and Athabasca river systems, which receive a diversity of effluent discharges including municipal sewage, agricultural runoff, and effluent from oil sands and pulp mills. Investigators conducted two experiments to accomplish this goal: identification of the interactive effects of both nutrient enrichment and grazing by aquatic insects (herbivory) on algal biomass, using nutrient diffusing substrata (NDS) downstream of the Hinton combined effluent; and using NDS to quantify large-scale patterns in algal biomass and nutrient limitation upstream and downstream of the major effluent and tributary input sources along the three rivers. NDS placed at 33 sites aided in the identification of river reaches having no nutrient limitation and those having some form of nutrient limitation.
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: 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: Robert B. More
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 120
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Book Description
An important component of the Northern River Basins Study was the original data resulting from the collection and analysis of environmental samples. Samples were collected, stored, and analysed by a number of different agencies, and an inventory of samples obtained by the Study and results data were compiled into a single electronic database to ensure future ease of access to the original data. This report describes the data contained in the database, the methods used to compile the database, the media and the nature of the samples, the collection site, and the data collected. Information is provided on which analyses were conducted on samples as well as the values of various parameters measured for the samples. All the files and the data fields that comprise the database are described in the users' guide in the report appendix.
Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 1738
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Book Description
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: 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:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 530
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Book Description
Author: Northern River Basins Study (Canada)
Publisher:
ISBN: 9780662234388
Category : Aquatic ecology
Languages : en
Pages : 55
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Book Description
Author: W.J. Frazier
Publisher: Springer Science & Business Media
ISBN: 1461317959
Category : Science
Languages : en
Pages : 735
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Book Description
An early reviewer of this book stated that he had difficulty assessing its marketability because it "falls between the cracks" of geological literature. We have designed this book to meet a need of modem geology: namely, a single source providing both detailed and synoptic stratigraphy of the various regions of North America, through geological time. Shortly after beginning work on such a book, we realized why it had not yet been written: it required six years of effort, assimilation of an incredible amount of information, and two years' additional work to cut the volume down to publishable size. Further, by the time the final chapter was written, the fIrst few were already out of date. Nevertheless, the book lies in front of you. It is intended to serve several purposes. As a textbook, it will serve the following courses: • Regional stratigraphy • Sedimentary tectonics • Regional tectonics • Advanced historical geology • Survey-level paleontology Obviously, not all portions of the book are relevant to all of the above courses. We assume the reader will retain this book after the particular course is done, and will use it as a reference book. Hopefully, others will obtain the book solely for reference purposes. We believe it will be especially useful for the working geologist or academic geologist seeking generalized and some moderately detailed information about a region or geological time interval which is unfamiliar.
