2023 Early Hearing Detection & Intervention Conference

March 5-7, 2023 • Cincinnati, OH

6/05/2017 | 10:15 AM - 10:30 AM | Response of arid-river fishes to extreme hydrologic and wildfire disturbance | 302C

Response of arid-river fishes to extreme hydrologic and wildfire disturbance

The extent to which populations and communities of stream organisms are influenced by natural and anthropogenic disturbance is influences by magnitude of the disturbances, characteristics of the habitat, and traits of species occupying those habitats. Unfortunately, there are relatively few systems that are sampled intensively on both spatial and temporal scales to capture responses to extreme events. We use data from long-term monitoring spanning a range of disturbances including supraseasonal drought, wildfire and extreme flooding to characterize the resistance and resilience of the fish communities of the upper Gila River basin in New Mexico. The response of fish communities to regional disturbances was most variable in headwaters, which ranged from complete extirpation of all taxa to undetectable changes in community structure. Mainstem sites responded more linearly to disturbance magnitude. Although native species were more broadly affected by disturbance than nonnatives, their recovery was generally rapid. Our results suggest resistance of fishes to disturbance is highly dependent on spatial position within the stream network and resilience is influence by species traits.

C22 Disturbance
C15 Population Ecology
S31 Moving forward in flow ecology: identifying and testing key hypotheses

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Presenters/Authors

Keith Gido (), Kansas State University, kgido@ksu.edu;