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Evaluation Preliminaire De Levolution A Long Terme De La Qualite De Lecosysteme Du Fjord Du Saguenay
Download Evaluation Preliminaire De Levolution A Long Terme De La Qualite De Lecosysteme Du Fjord Du Saguenay full books in PDF, epub, and Kindle. Read online Evaluation Preliminaire De Levolution A Long Terme De La Qualite De Lecosysteme Du Fjord Du Saguenay ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Évaluation préliminaire de l'évolution à long terme de la qualité de l'écosystème du Fjord du Saguenay by : Parcs Canada
Download or read book Évaluation préliminaire de l'évolution à long terme de la qualité de l'écosystème du Fjord du Saguenay written by Parcs Canada and published by . This book was released on 1987 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Chemical Contaminants in Canadian Aquatic Ecosystems by : D. M. Whittle
Download or read book Chemical Contaminants in Canadian Aquatic Ecosystems written by D. M. Whittle and published by Canadian Government Publishing. This book was released on 1998 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report focuses on those chemicals that persist in the Canadian environment and that are accumulated by aquatic organisms. It summarizes scientific information collected previously, with emphasis on Canadian research findings published in the last decade. The first part of the report introduces the general features of aquatic ecosystems and provides basic information on the fate and effects of chemical contaminants. The second part reviews contaminant related issues for the following geographic areas: Atlantic marine ecosystems including the St. Lawrence, Bay of Fundy, and general north-west Atlantic; freshwater ecosystems including the Great Lakes and inland waters; the Arctic marine ecosystem; and Pacific aquatic ecosystems including the British Columbia coastal ecosystem, the open coast, and some of the major rivers. All chapters discuss the major contaminant issues, important oceanographic or limnological features, biological resources, and sources of contaminants as well as contaminant trends, distribution, and effects. Current and emerging chemical contaminant issues and associated research topics are summarized at the end of each chapter. The third part is an overall assessment of current knowledge of chemical contaminants and their effects on fish and fish habitat, and identifies major current and emerging contaminant issues confronting Canada's fish and fish habitat.
Book Synopsis Reconstitution paléolimnologique de l'évolution de l'état trophique de deux lacs de la région minière de Fermont (Québec subarctique, Canada) by : Olivier Jacques
Download or read book Reconstitution paléolimnologique de l'évolution de l'état trophique de deux lacs de la région minière de Fermont (Québec subarctique, Canada) written by Olivier Jacques and published by . This book was released on 2018 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'apparition récurrente d'importantes efflorescences de cyanobactéries à la surface des eaux des lacs Sans Nom et Carheil (Fermont, Québec subarctique) au cours des dernières années a soulevé des inquiétudes concernant leur état de santé étant donné que ce phénomène témoigne normalement d'un processus avancé d'eutrophisation. Des démarches ont été entreprises en vue de favoriser leur rétablissement. Cependant, peu d'informations étaient disponibles concernant l'évolution de leur condition limnologique jusqu'à aujourd'hui, ce qui limitait notre compréhension de la problématique qui les affectait. Le projet de recherche visait à combler ce manque de connaissances à l'aide d'une approche paléolimnologique. Les résultats démontrent que les lacs Sans Nom et Carheil sont demeurés dans un état relativement stable pendant des milliers d'années jusqu'à ce que débute approximativement l'ère industrielle (~ 1850 AD) et que des changements prennent progressivement place dans leur condition. Les modifications dans les assemblages de diatomées (algues microscopiques; classe Bacillariophyceae) préservés dans les sédiments associés à cette période reflètent vraisemblablement des changements climatiques régionaux. La dégradation de l'état de santé des lacs n'est cependant évidente qu'à partir des années 1970 concordant avec l'établissement de la ville de Fermont et le début des rejets d'eaux usées dans le bassin versant. L'augmentation de l'abondance relative de taxons de diatomées typiques des milieux enrichis (e.g., Aulacoseira subarctica) et la disparition presque totale d'espèces indicatrices de bonnes conditions écologiques (e.g., Discostella stelligera) coïncident avec d'autres changements au niveau d'indicateurs géochimiques (e.g., ratios carbone/azote) et témoignent de l'augmentation de la productivité primaire des eaux. Le niveau de détérioration des lacs demeure toutefois modéré, ce qui laisse entrevoir de bonnes perspectives de rétablissement. Les conclusions présentées dans cette étude pourront être utilisées par les autorités locales afin d'orienter leurs prises de décision face à la gestion de la qualité de l'eau des lacs Sans Nom et Carheil.
Author :Serge Hébert Publisher :[Sainte-Foy, Québec] : Ministère de l'environnement et de la faune ISBN 13 :9782550098836 Total Pages :58 pages Book Rating :4.0/5 (988 download)
Book Synopsis Qualité des eaux du Saguenay-Lac-Saint-Jean by : Serge Hébert
Download or read book Qualité des eaux du Saguenay-Lac-Saint-Jean written by Serge Hébert and published by [Sainte-Foy, Québec] : Ministère de l'environnement et de la faune. This book was released on 1995 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Canada. Department of Fisheries and Oceans Publisher :Peches Et Oceans Direction Generale Des Communications = Fisheries and Oceans Communications Dir ISBN 13 : Total Pages :376 pages Book Rating :4.:/5 (31 download)
Book Synopsis Le Golfe Du Saint-Laurent--petit Océan Ou Grand Estuaire? by : Canada. Department of Fisheries and Oceans
Download or read book Le Golfe Du Saint-Laurent--petit Océan Ou Grand Estuaire? written by Canada. Department of Fisheries and Oceans and published by Peches Et Oceans Direction Generale Des Communications = Fisheries and Oceans Communications Dir. This book was released on 1991 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of a workshop, the scientific reviews and the contributed papers presented at the symposium. The document presents a brief historical summary of marine research in the Gulf; reports the discussions, conclusions and recommendations of the different working groups on oceanography (physics, biology, chemistry and sedimentology) and on the fishery (fish and invertebrates); then presents the discussions of each multidisciplinary working group, centered around how the St. Lawrence system may be used as a natural laboratory which will contribute to the solution of major long-term problems of conservation of natural resources and of the quality of the environment.
Book Synopsis Nitrogen Cycling in Coastal Marine Environments by : T. Henry Blackburn
Download or read book Nitrogen Cycling in Coastal Marine Environments written by T. Henry Blackburn and published by . This book was released on 1988-03-21 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitrogen discharge to the coastal environment has been increasing, posing the threat of accelerated eutrofication. Considerable research has been conducted in recent years to examine the impact of the nitrogen loading in coastal ecosystems. Based on proceedings from a SCOPE symposium held at the University of Aarhus in July of 1985, this volume covers a variety of up-to-date developments in research on nitrogen cycling in coastal marine environments. Topics include the role of nitrogen in algal productivity, regeneration of nutrients in the water column and the sediments, and the flow of nitrogen in coastal ecosystems.
Book Synopsis The Last Billion Years by : Atlantic Geoscience Society
Download or read book The Last Billion Years written by Atlantic Geoscience Society and published by Nimbus Publishing (CN). This book was released on 2001 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is about the history of the rocks and fossils of the Maritime Provinces of Canada (New Brunswick, Nova Scotia and PEI) over the last billion years. The book is beautifully illustrated in full colour, with original paintings of ancient vistas, over 150 photographs, and crisp explanatory diagrams and sketches.
Book Synopsis Production of Juvenile Atlantic Salmon, Salmo Salar, in Natural Waters by : National Research Council Canada
Download or read book Production of Juvenile Atlantic Salmon, Salmo Salar, in Natural Waters written by National Research Council Canada and published by NRC Research Press. This book was released on 1993 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: Up-to-date information, knowledge and research in progress in scientific fields related to natural production of juvenile Atlantic salmon and some other ecologically similar fluvial salmonids is contained in the 25 papers and 12 abstracts contained in this publication, which were prepared for an international symposium held in St. John's, Newfoundland. Studies relate to stream ecology, invertebrates and predators, habitat improvement, competitive effects, behaviour and dispersal, habitat and production of juvenile salmon, population dynamics and relationships of juvenile salmon estimates to smolt yields. A list of participants at the conference is also provided.
Book Synopsis The Gulf Ecosystem by : Nuzrat Yar Khan
Download or read book The Gulf Ecosystem written by Nuzrat Yar Khan and published by . This book was released on 2002 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt:
