Relationships between Channel Characteristics, Woody Debris, and Fish Habitat in Northwestern Washington Streams
- 1 March 1997
- journal article
- Published by Oxford University Press (OUP) in Transactions of the American Fisheries Society
- Vol. 126 (2) , 217-229
- https://doi.org/10.1577/1548-8659(1997)126<0217:rbccwd>2.3.co;2
Abstract
Relationships between large woody debris (LWD) and pool area or pool spacing varied with channel slope and channel width for streams in second-growth forests in northwest Washington. Pool spacing (expressed as the number of channel widths between pools) decreased as number of woody debris increased in both moderate-slope (0.02 < slope < 0.05) and low-slope (0.001 < slope ≤ 0.02) channels, but the relationship was stronger in moderate-slope channels. Percent pool was also more strongly correlated with woody debris volume in moderate-slope channels than in low-slope channels. Multiple-regression analyses showed that pool spacing and percent pool were correlated with an interaction term between LWD abundance and channel slope, suggesting that the influence of LWD on pool formation changes with channel slope. Analysis of pool-forming mechanisms indicated that low-slope channels are less sensitive to LWD abundance because pools are formed by mechanisms other than LWD when LWD abundance is low. Size of...Keywords
This publication has 0 references indexed in Scilit: