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Author:
Publisher:
ISBN:
Category : Lakes
Languages : en
Pages :
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Book Description
Author:
Publisher:
ISBN:
Category : Lakes
Languages : en
Pages :
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Book Description
Author: Andre-Marcel Baril
Publisher:
ISBN:
Category :
Languages : en
Pages : 101
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Book Description
The loss of spawning habitat has been identified as a limiting factor for population growth of lake sturgeon, Acipenser fulvescens, a species that is endangered or threatened throughout its range. Hence, the restoration of spawning habitat has become a common practice, with at least 17 projects completed in the last 20 years. One project on the Ouareau River in Quebec entailed the installation of three artificial spawning reefs and two sills to address a landslide, headward erosion and dam activity. Our study adopted an adaptive management framework that incorporated 3D hydrodynamic modeling and a habitat suitability index to assess the performance of the sills and the success of the restoration project. We first compiled data from 48 sites across the range of the species to produce univariate habitat suitability indices to describe the spawning niche. Peak suitability occurred at depth-averaged velocities of 0.6 m·s-1, depths of 0.55 – 0.85 m in small rivers (100 m3·s-1 annual average discharge) and 0.75 – 5.25 m in large rivers (100 m3·s-1), over cobble substrates (64 – 256 mm) and water temperatures of 13.8 – 14.3 °C. To assess the quantity of suitable habitat, univariate habitat suitability results were compiled into a multivariate suitability index using a fuzzy weighted linear combination, and applied to the 3D hydrodynamic model of the Ouareau spawning area. Our model indicated an abundance of suitable habitat and that the artificial spawning sites were placed in poor locations (velocity at sites > spawning requirements). By simulating river conditions prior to sill construction using the 3D hydrodynamic model, we found that the sills only have a minimal effect on the site, including no significant effect on the water surface longitudinal profile or depth averaged current velocity. Using the adaptive management framework, we identified flaws in the restoration project, related to the pre-assessment process, restoration design and evaluation, and hypothesis development. These results fill a knowledge gap by quantifying the reproductive niche of lake sturgeon, and identifying the need for multi-disciplinary insight in habitat restoration projects.
Author: G. Dennis Cooke
Publisher: Elsevier
ISBN: 1483163253
Category : Technology & Engineering
Languages : en
Pages : 401
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Book Description
Lake and Reservoir Restoration deals with the eutrophication process and the methods to protect, restore, and manage lakes and reservoirs. The most common in-lake techniques or procedures, plus nutrient diversion, are reviewed with regard to their scientific basis, methods of application, known effectiveness, feasibility, drawbacks, and costs. Areas for further research and development are also highlighted. This book is comprised of 16 chapters organized into four sections. After an introduction to the theory of the problem and the restoration technique, the discussion turns to the various restoration methods such as those used for physical and chemical control of nutrients. Diversion and advanced waste treatment, hypolimnetic withdrawal, and dilution and flushing are considered along with phosphorus precipitation and inactivation, sediment oxidation, sediment removal, and hypolimnetic aeration. Case studies and success stories are presented and the costs and potential negative impacts of the methods are examined. The following chapters focus on methods to control plant biomass, including artificial circulation, water-level drawdown, harvesting, biological control, and surface and sediment covers. A chapter on liming acidified lakes concludes this text. This monograph will be useful to professional limnologists and engineers, on-site lake or reservoir managers, and those who are interested in learning about the problems and management of lakes and reservoirs.
Author: Patrick O'Sullivan
Publisher: John Wiley & Sons
ISBN: 1405141107
Category : Technology & Engineering
Languages : en
Pages : 568
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Book Description
Continuing concern about water supply and quality, ecosystem sustainability and restoration demands that the modern approach to the management of lakes and reservoirs should be based on a sound understanding of the application of the scientific and ecological principles that underlie freshwater processes. The Lakes Handbook provides an up-to-date overview of the application of ecologically sound approaches, methods and tools using experience gained around the world for an understanding of lakes and their management. Volume one of the Handbook addresses the physical and biological aspects of lakes pertinent to lake management, emphasising those aspects particularly relevant to large, still bodies of water. Volume two then considers lake management, with particular emphasis on sustainability, restoration and rehabilitation. This handbook will be invaluable to ecologists, environmental scientists, physical geographers and hydrologists involved in limnological research, as well as advanced undergraduate and graduate students looking for authoritative reviews of the key areas of limnological study.
Author:
Publisher:
ISBN: 9780660081793
Category :
Languages : en
Pages : 1
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Book Description
Author: United States. Environmental Protection Agency. Office of Water Planning and Standards
Publisher:
ISBN:
Category : Lake ecology
Languages : en
Pages : 268
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Book Description
Author: James Andrew Crossman
Publisher:
ISBN:
Category : Fish stocking
Languages : en
Pages : 388
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Book Description
Author: Vadim J. Birstein
Publisher: Springer Science & Business Media
ISBN: 0792345177
Category : Nature
Languages : en
Pages : 444
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Book Description
This volume presents a synthesis of basic biological and conservation data for more than 30 species of sturgeons (Acipenseridae), paddlefishes (Polyodontidae) and their fossil allies in the order Acipenseriformes. Since the Jurassic, the four families of sturgeon-like fish have been restricted to the Holarctic, where until very recently they flourished in most major river systems. Today, however, virtually all species of sturgeons and paddlefishes face difficult conservation issues. Papers in the first section of this volume examine paleontology, systematics, evolution and basic biology of Acipenseriformes. The second section of this volume details current conservation status for most of the world's living species of Acipenseriformes. These papers mark the first attempt to make such a global review of recent data from across the northern hemisphere. The emerging picture is discouraging, for negative anthropogenic impacts range from overfishing to water pollution, to dams and water diversion projects, and all species are threatened to some degree. The third section of the volume considers specific human impacts and responses to conservation issues. These include: the Aral Sea ecological disaster and its impact on native sturgeons; a review of methods for restoring sturgeon populations; the use of molecular techniques in developing conservation strategies; the extreme sensitivity of sturgeons and paddlefishes to overfishing; and the history of a recently convicted caviar poaching ring. The volume's summary reviews the status of all extant species and notes future directions for research on behavior, ecology and population biology that could lead to better co-ordinated international conservation efforts.
Author: United States. Congress. House. Committee on Science
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 104
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Book Description
Author: Ben McClanahan
Publisher: North Star Editions, Inc.
ISBN: 1644933071
Category : Juvenile Nonfiction
Languages : en
Pages : 32
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Book Description
Explores the richness of the Great Lakes, how humans have damaged it, and efforts being taken to restore it. Clear text, vibrant photos, and helpful infographics make this book an accessible and engaging read.
