2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/24/2018 | 9:45 AM - 10:00 AM | INTERMITTENT STREAMS MAKE SIGNIFICANT CONTRIBUTIONS TO BIODIVERSITY IN DRYLAND RIVERS OF THE SOUTHWESTERN UNITED STATES | 310 B
INTERMITTENT STREAMS MAKE SIGNIFICANT CONTRIBUTIONS TO BIODIVERSITY IN DRYLAND RIVERS OF THE SOUTHWESTERN UNITED STATES
Dryland rivers are among the most threatened freshwater ecosystems by virtue of significant alterations to the hydrologic regime and rapidly changing climate leading to decreasing flow connectivity. Native fishes of dryland rivers face a dual threat from decreasing flow connectivity and negative interactions with nonnative species, affecting species distributions and biodiversity patterns in the Southwestern United States. With long-term monitoring data in the Verde and Little Colorado Rivers (Arizona), we used a hierarchical investigative structure within a metacommunity framework to examine local and species contributions to beta diversity from intermittent and perennial sites. We examine whether (1) intermittent sites make significant local contributions to beta diversity (LCBD), and (2) which major life history strategies or species origins (native and nonnative) affect species contributions to beta diversity (SCBD) among intermittent and perennial streams. Following expectations, intermittent sites had significant LCBD compared to perennial sites. Intermittent sites were more likely to have native species and species with the opportunistic life history strategy indicating that intermittent streams are ecologically unique. Maintaining periodic flow connectivity of intermittent streams within river networks will be important for the conservation of threatened and endangered Southwestern fishes.
- Connectivity
- Climate Change
- Intermittent
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Presenters/Authors
Jane Rogosch
(), University of Washington, jfencl@uw.edu;
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Julian Olden
(), University of Washington, olden@uw.edu;
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