2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/26/2021 | 8:30 AM - 10:30 AM | FROM PERENNIAL TO EPHEMERAL: HYDROLOGIC GRADIENTS IN DESERT STREAMS STRUCTURE AQUATIC INVERTEBRATE COMMUNITIES ACROSS THE AMERICAN SOUTHWEST | Virtual Platform
FROM PERENNIAL TO EPHEMERAL: HYDROLOGIC GRADIENTS IN DESERT STREAMS STRUCTURE AQUATIC INVERTEBRATE COMMUNITIES ACROSS THE AMERICAN SOUTHWEST
Intermittent streams and rivers are hallmarks of arid-land and desert ecosystems. Within these
systems, there is often a gradient of hydrology, from perennial to ephemeral reaches, linked to
seasonality, which may vary across ecoregions. The goal of this study was to untangle the effects
of basin-wide hydrology and seasonality on aquatic insect communities. In three major desert
ecoregions that differ in rainfall patterns (Sonoran, Chihuahuan, and Mojave Deserts) we
intensively sampled aquatic invertebrates in all habitats (perennial, intermittent, and ephemeral)
in two replicate stream networks in two seasons (Spring, Fall) across two years (51 sample sites
). We deployed electrical resistance sensors to directly quantify reach-scale hydrology year-
round. Preliminary results show drainages with a majority of intermittent sites (>50%) have a
larger Chao community dissimilarity than drainages that were fully perennial. Understanding how changes in hydrology impact aquatic invertebrate communities provide insight to how
stream ecosystems will respond to future climate changes.
- Connectivity
- Dry rivers
- Stream
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Presenters/Authors
Angelika Kurthen
(), Oregon State University, kurthena@oregonstate.edu;
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Tiffany Schriever
(), Western Michigan University, tiffany.schriever@wmich.edu;
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Richard VanDriesche
(), Oregon State University, Richard - FW Van Driesche
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Dave Lytle
(), Oregon State University, lytleda@oregonstate.edu;
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