Return to the River: Restoring Salmon Back to the Columbia RiverRichard N. Williams Elsevier, 21 нояб. 2005 г. - Всего страниц: 720 Return to the River will describe a new ecosystem-based approach to the restoration of salmon and steelhead populations in the Columbia River, once one of the most productive river basins for anadromous salmonids on the west coast of North America. The approach of this work has broad applicability to all recovery efforts throughout the northern hemisphere and general applicability to fisheries and aquatic restoration efforts throughout the world. The Pacific Northwest is now embroiled in a major public policy debate over the management and restoration of Pacific salmon. The outcome of the debate has the potential to affect major segments of the region's economy - river transportation, hydroelectric production, irrigated agriculture, urban growth, commercial and sport fisheries, etc. This debate, centered as it is on the salmon in all the rivers, has created a huge demand for information. The book will be a powerful addition to that debate.
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... habitat in the upper Columbia River. Because of the lack of access to habitat above Grand Coulee, fish passage facilities were deemed unnecessary at Chief Joseph Dam, located not far below Grand Coulee. Similarly, Hells Canyon Dam ...
... habitat 1 availability and habitat quality. Specific Assumptions—Solutions to the Problem of Salmon Depletion Level of Proof 1s. Water velocity can be enhanced either by augmenting flows from 1 upstream reservoirs or by reducing the ...
... habitats with a high degree of connectivity among habitat patches. Habitat variation in space and time creates a template for development of diverse life histories and complexes of locally adapted populations that may be genetically and ...
... Habitat Variability and Complexity Conservation Principle 2 Sustained salmonid productivity requires a network of complex and interconnected habitats, which are created, altered, and maintained by natural physical processes in ...
... habitats are essential for sustaining salmonid productivity. Habitats must be both suitable for survival and reproduction and accessible to organisms. Habitat connectivity provides the opportunity for species to reach habitats critical ...
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Return to the River: Restoring Salmon to the Columbia River Richard Nicholas Williams Недоступно для просмотра - 2006 |