2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/25/2021 | 2:00 PM - 3:30 PM | INCREASING WATER TEMPERATURES CONTRIBUTE TO POPULATION DECLINES OF MANAGED TROUT POPULATIONS IN THE BLACK HILLS, SOUTH DAKOTA | Virtual Platform
INCREASING WATER TEMPERATURES CONTRIBUTE TO POPULATION DECLINES OF MANAGED TROUT POPULATIONS IN THE BLACK HILLS, SOUTH DAKOTA
Climate change and ubiquitous anthropogenic modification and management of river systems has degraded the quality of fisheries of interest to conservation and recreation. To understand population dynamics and address an apparent decline in sport fish in the Black Hills of South Dakota, we evaluated 30 years of fish monitoring data, and 1 year of daily ecosystem metabolism data. We linked monitoring data to management strategies, habitat restoration and improvement projects, and natural variability of environmental conditions. Abundance of trout decreased at lower stream flows and higher water temperatures. Lower trophic levels contributed less to the food web with decreasing light availability as moderated by topography and tree cover. In the Black Hills, elevated water temperatures and lack of thermal refuge, particularly during periods of low flow, contribute to population declines of trout.
- Monitoring
- Management
- Restoration
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Presenters/Authors
Kurt Chowanski
(), South Dakota School of Mines, kurt.chowanski@sdsmt.edu;
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Lisa Kunza
(), South Dakota School of Mines and Technology, lisa.kunza@sdsmt.edu;
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Michaela Halvorson
(), South Dakota School of Mines, michaela.halvorson@mines.sdsmt.edu;
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