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Johnson et al . . 1986). Elliott (1986) assessed the effects 

 of an experimental removal of all woody debris in 

 Starrigavin Creek near Sitka. He found an 80 % reduction in 

 the Dolly Varden population a year after debris removal 

 demonstrating the importance of large woody debris to stream 

 structure and habitat. Bryant (1980) documented the 

 extensive changes in the stream channel of Maybeso Creek 

 caused by timber harvest operations and the effects on woody 

 debris accumulations. Forest management activities (roading 

 and timber harvest) directly alter debris loading by 

 addition or removal of material and by indirectly increasing 

 debris torrents and removing standing streamside trees 

 (Swanston and Swanson, 1976) . Many other studies since the 

 mid-1950' s have shown significant changes in fish habitat. 

 A detailed bibliography and copies of specific studies can 

 be supplied upon request. 



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