2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/22/2018 | 2:15 PM - 2:30 PM | LONGITUDINAL DRIFT RECOVERY PATTERNS DOWNSTREAM OF LARGE DAMS | 310 A
LONGITUDINAL DRIFT RECOVERY PATTERNS DOWNSTREAM OF LARGE DAMS
Large dams impose a suite of physical, chemical, and hydrological changes on river ecosystems, particularly in the tailwater reaches that exist within the first several kilometers downstream of these dams. Nonetheless, surprisingly little is known about how tailwater invertebrate communities on the large rivers downstream of such dams may vary throughout these tailwater reaches. Rivers downstream of dams are thought to behave much like headwater streams in the sense of having no source of upstream colonists, for instance, but such relationships are rarely quantified. In this presentation, we will focus on patterns of invertebrate drift within the first ~15 miles downstream of dams. Using a spatially-extensive, repeat dataset spanning eight tailwaters throughout the Colorado River Basin in the western US, we will explore longitudinal recovery patterns with respect to individual taxa and functional groups, as well as the overall invertebrate community. These results will elucidate the extent to which invertebrate communities are affected by dams, and the rate at which this influence may dissipate moving downstream.
- Invertebrate
- Multi-stressors
- Anthropogenic
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Presenters/Authors
Jeffrey Muehlbauer
(), USGS Grand Canyon Monitoring and Research Center, jmuehlbauer@usgs.gov;
ASHA DISCLOSURE:
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Ted Kennedy
(), USGS Southwest Biological Science Center, Grand Canyon Monitoring and Research Center, tkennedy@usgs.gov;
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Nonfinancial -