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Study links flow metrics to salmon recruitment in Scott River but finds other factors are also important
Summary
An empirical analysis of the Scott River found that appropriately selected functional flow metrics explained roughly 40% of variation in coho smolt per female and about 60% of Chinook juvenile abundance in the tested models, but authors cautioned that other environmental and oceanic factors also influence recruitment.
A study presented to the work group by Claire Koba used empirical modeling to examine how much variation in salmon recruitment in the Scott River can be explained by functional flow metrics.
Claire Koba, a postdoctoral researcher, said the team used lasso regression and multivariate adaptive regression splines (MARS) to link flow predictors from the Fort Jones gauge to ecological observations (juvenile counts and related metrics). For selected model structures the team reported it…
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