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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... rearing areas lost to inundation by the dams and habitat degradation in the tributaries. In the Columbia and Snake rivers, the salmon's migration route was replaced by elaborate systems to collect and transport juvenile fish around the ...
... rearing habitat in the mainstem river and tributaries (Chapter 8). The era of Columbia River dam construction began with completion of Rock Island Dam in 1933. This was followed by Bonneville Dam in 1938 and Grand Coulee Dam in 1941 ...
... rearing habitat supported by the fish and wildlife programs of the NPCC and BPA. Restoration involved rebuilding the riparian corridor and stream channel through active restoration, willow plantings, and removal of cattle grazing ...
... rearing, migration, maintenance of food webs, and predator avoidance. Ocean conditions, which are variable, are important in determining the overall patterns of productivity of salmon populations. Healey and Prince (1995) summarize a ...
... rearing, and a corridor for migration of adults and juveniles (Schlosser 1991). Leaves and wood debris eroded from the riparian zone into the channel energize the riverine food web, provide cover for fishes and refugia from floods, and ...
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Return to the River: Restoring Salmon to the Columbia River Richard Nicholas Williams Недоступно для просмотра - 2006 |