Từ chối khấu ở Tây Bắc Thái Bình Dương cổ phiếu cá hồi (PNW) Có Been Kết hợp với sử dụng đất gây thiệt hại môi trường sống nước ngọt (Nehlsen et al., 1991). Nguồn lực đáng kể được hướng Là Hướng tới sự phục hồi của môi trường sống dòng trong các nỗ lực để duy trì và / hoặc khôi phục lại cổ phiếu cá hồi hoang dã trong PNW, nhưng vẫn là không có khuôn khổ khoa học phổ biến hướng dẫn các ưu tiên của môi trường sống của cá hồi ở đâu và cách bảo. | CHAPTER 14 Watershed-Based Evaluation of Salmon Habitat Ross S. Lunetta Brian L. Cosentino David R. Montgomery Eric M. Beamer and Timothy J. Beechie INTRODUCTION Dramatic declines in Pacific Northwest PNW salmon stocks have been associated with landuse induced freshwater habitat losses Nehlsen et al. 1991 . Substantial resources are being directed toward the restoration of stream habitats in efforts to maintain and or restore wild salmon stocks in the PNW yet there is no common scientific framework for guiding the prioritization of where and how salmon habitat preservation and restoration activities should occur. GIS-based analysis can provide a systematic tool for targeting restoration opportunities by rapidly characterizing potential salmon habitat over large geographic regions and by providing baseline data for development of habitat restoration strategies. When integrated data on stream channels riparian habitat and watershed characteristics provide a powerful tool for the development of watershed restoration and management strategies Delong and Brusven 1991 . Previous efforts to prioritize salmon habitat preservation and restoration opportunities on state and federal lands in Oregon Bradbury et al. 1995 and Washington Oman and Palensky 1995 have met with some success but problems associated with data availability over large geographic regions have limited applications. The objectives of this study were to a develop a rapid cost-effective and objective analytical tool to support prioritization of specific subbasins and watersheds for salmon habitat preservation and restoration opportunities b investigate the correspondence between forest seral stage and large woody debris LWD recruitment and associated pool-riffle stream bed morphologies c illustrate the creation of integrated baseline data to support watershed analyses and the development of preservation and restoration strategies and d explore the use of such data to facilitate the communication of scientific
