2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
6/06/2017 | 2:45 PM - 3:00 PM | INTRODUCED FISHES IN RIVERS OF THE US GREAT BASIN | 302B
INTRODUCED FISHES IN RIVERS OF THE US GREAT BASIN
Stability of Great Basin river fish assemblages have been challenged by nearly two centuries of anthropogenic impacts. Overfishing, introduced species, and changing climate have shaped the current assemblage of fishes. We surveyed fishes of the Carson, Humboldt, and Bear River watersheds in Nevada, Idaho, and Utah. Our approach was to use multivariate ordinations to visualize fish assemblages with and without invasives, and by functional process zone. We created species distribution models for five fish species native to the Great Basin under two future climate scenarios and for two time periods. Valley shape had a distinct effect on lowland fish assemblages but not on upland assemblages. Climate models varied among species with ranges of Tahoe Sucker and Speckled Dace expanding under future conditions while those of Mountain Sucker and Paiute Sculpin contracted. Understanding how the surrounding landscape and climate influence river fauna is useful in predicting invasion potential and for mitigating effects of established invasive species and protecting natives.
- C26 Invasive Species
- C20 Climate Change
- S29 Macrosystem Ecology of Aquatic Systems
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Presenters/Authors
Robert Shields
(), Ball State University, rcshields@bsu.edu;
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Mark Pyron
(), Ball State University, mpyron@bsu.edu;
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Mario Minder
(), Ball State University, mmminder@bsu.edu;
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