and decreased water quality. Tolerance Tolerance to anthropogenic alterations: low, moderate1, high Local extinction is due to changes in water quality (dissolved oxygen, temperature) associated with changing discharge. Colonization Locomotion morphology2 cruiser: streamlined fishes that are generally found swimming in the water column, hugger: fishes that are generally in contact with the stream bottom, other1 The effect of discharge on colonization is related to fish swimming ability as indexed by morphology. Body size Adult body size (total length): small ≤100 mm, medium1 > 100mm and < 200 mm, large >200 mm The effect of discharge on colonization is related to fish swimming ability as indexed by body size. Spawning duration Number of months devoted to spawning in a given year Colonization is primarily due to spawning migration so the effect of discharge on colonization is related to spawning duration. Reproduction Spawning behavior complex spawning: species that build and guard nests, Complex spawners devote greater physiological resources to spawning activities (e.g., nest building) and are more vulnerable to variable flows broadcast spawning: species that broadcast eggs into the water column or over substrate during spawning, other1 Spawning duration Number of months devoted to spawning in a given year Species with protracted spawning durations have greater spawning opportunities and are less influenced by discharge during the spawning period (spring). Locomotion morphology2 cruiser: streamlined fishes that are generally found swimming in the water column, hugger: fishes that are generally in contact with the stream bottom, other1. Young-of-year fishes are vulnerable to changing discharge conditions during juvenile rearing period (summer). 1Category used as baseline in binary coding. 2Terminology is from Goldstein and Meador (2004) and hugger is combined hugger and creeper morphology of Goldstein and Meador (2004).
morphology) (Link, unconfined, median discharge, median discharge*link, median discharge* unconfined, median discharge* body size),  (Link, dlink, 10-day high discharge, unconfined, spring, 10-day high discharge*link, 10-day high discharge* body size), R(Unconfined, summer discharge SD, summer discharge SD* locomotion morphology) 38 3181.9 1.89 0.102 ( Link, unconfined, 10-day low discharge, 10-day low discharge*link, 10-day low discharge* unconfined, 10-day low discharge* tolerance),  (Link, dlink, 10-day high discharge, unconfined, spring, 10-day high discharge*link, 10-day high discharge, locomotion morphology), R(Unconfined, summer discharge SD, summer discharge SD* locomotion morphology) 38 3183.1 3.06 0.057 ( Link, unconfined, median discharge, median discharge*link, median discharge* unconfined, median discharge* body size),  (Link, dlink, 10-day high discharge, unconfined, spring, 10-day high discharge*link, 10-day high discharge, locomotion morphology), R(Unconfined, summer discharge SD, summer discharge SD* locomotion morphology) 38 3183.1 3.13 0.055 (Link, unconfined, median discharge, median discharge*link, median discharge* unconfined, median discharge*tolerance), (Link, dlink, 10-day high discharge, unconfined, spring, 10-day high discharge*link, 10-day high discharge* body size), 38 3183.7 3.71 0.041