NATURAL FLOW REGIMES, NONNATIVE FISHES, AND NATIVE FISH PERSISTENCE IN ARID-LAND RIVER SYSTEMS.

The article examines how natural flow regimes and presence of nonnative species impressed long-term stability of nature fish assemblages in arid-land river systems. The paper monitors fish assemblages at six different locations to characterize components that influenced the stability of native warmwater fish assemblages. It aims to test whether there were long-term directional changes in fish assemblage structure across the six locations, and to characterize the response of native and nonnative fishes to attributes of a natural flow regime.