| effects of flow regimes altered by dams on survival, population declines, and range-wide losses of california river-breeding frogs. | widespread alteration of natural hydrologic patterns by large dams combined with peak demands for power and water delivery during summer months have resulted in frequent aseasonal flow pulses in rivers of western north america. native species in these ecosystems have evolved with predictable annual flood-drought cycles; thus, their likelihood of persistence may decrease in response to disruption of the seasonal synchrony between stable low-flow conditions and reproduction. we evaluated whether a ... | 2012 | 22594596 |