"Sediment Dispersion in Salmon Spawning Streams: The Influence of Floods and Salmon Redd Construction".

The article presents the authors response to the comments made by John M. Faustini to their research paper " "Sediment Dispersion in Salmon Spawning Streams: The Influence of Floods and Salmon Redd Construction. " According to the authors, the question of enhanced mobility is complex, and the relative influences of roughness elements and bed structure have not been well quantified. On the face of it, Faustini's observation is correct: the data as presented do not provide a particularly strong case for increased mobility of gravels. Their observations of vertical mixing of the bed suggest that salmon bioturbation likely improves the condition of spawning beds for future spawning. Faustini points out that this conclusion is not tenable based on the evidence presented, and is counter to Montgomery conclusion that surface coarsening and reduced mobility improves the chances of embryo survival. Faustini's suggestion of weighting the work done by spawning salmon by the percentage of clasts transported would seem to be a useful modification to their approach.