2023 Early Hearing Detection & Intervention Conference

March 5-7, 2023 • Cincinnati, OH

5/23/2019 | 11:15 AM - 11:30 AM | FLOW-ECOLOGY RELATIONSHIPS ACROSS THE GREAT PLAINS | 250 CF

FLOW-ECOLOGY RELATIONSHIPS ACROSS THE GREAT PLAINS

Streamflow is a “master variable” that largely governs stream ecological processes. The upper Red River basin is a variable, extreme environment, where periods of both excessive rainfall and drought are common, whereas the lower basin is much more humid. The basin transitions five states; thus, management interests also vary across the landscape. Of particular interest in the upper basin is the ecology of Prairie Chub Machrybopsis australis, a vulnerable pelagic-broadcast spawning cyprinid endemic to the Red River basin. As expected, we found detection probability was higher in the dry season, while the species was actually less likely to occur. Further, the importance of flow metrics, particularly the variability in the timing of high flow events, also differed across wet and dry seasons where the response was much more pronounced in the wet season. The lower basin, however, was much more difficult to model due to missing data, and the lack of gear reporting. Examining discharge requirements for Prairie Chub and other species of concern can inform management regulations on water use that may have broader implications beyond the Red River Basin.

Hydrology
Landscape
Watershed

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Presenters/Authors

Shannon Brewer (), U.S. Geological Survey, shannon.brewer@okstate.edu;