Physical Sciences and Mathematics Commons^™

A Network Model For Primary Production Highlights Linkages Between Salmonid Populations And Autochthonous Resources, W. Carl Saunders, Nicolaas Bouwes, Peter Mchugh, Chris E. Jordan

Watershed Sciences Faculty Publications

Spatial variation in fish densities across river networks suggests that the influence of food and habitat resources on assemblages varies greatly throughout watersheds. Conceptual models predict that in situ primary production should vary with river characteristics, but the influence of autochthonous resource availability on the capacity for river reaches to support fish is poorly understood. We estimated primary production throughout the South Fork and Middle Fork of the John Day River, Oregon, by measuring diel cycles in dissolved oxygen (DO) during July 2013. Using these data, we (1) evaluated the extent to which juvenile salmonid abundance and resource limitation correlated …