2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/20/2019 | 2:15 PM - 2:30 PM | BIOTIC RESPONSES TO BEAVER DAM ANALOG INSTALLATION IN A LOW-GRADIENT, INCISED STREAM | 150 G
BIOTIC RESPONSES TO BEAVER DAM ANALOG INSTALLATION IN A LOW-GRADIENT, INCISED STREAM
Beaver dam analogs (BDA) are used as a tool to restore degraded and incised streams. Biotic response of these structures are not fully understood, and post-treatment monitoring efforts are lacking. Biotic responses to physical habitat restoration are useful metrics of success for process-based stream restoration projects. We explore how community structure and the secondary production of macroinvertebrates are impacted due to changes in discharge, morphology, temperature, and sediment deposition from the instillation of BDAs in a low-gradient, low-order stream. We compared the production and functional-feeding groups of macroinvertebrates between naturally occurring beaver mediated, BDA, and reference riffle sites. Functional-feeding groups found at BDA sites were dissimilar to the reference sites, and shifted towards predator and collector-gatherer taxon found within the naturally occurring beaver mediated sites. Summer production estimates were highest for BDA sites, and lowest for the beaver mediated sites. This contradicts previous studies that showed beaver mediated sites to have higher levels of secondary production when compared to riffle sites on the same stream. These preliminary results highlight the need for post-treatment monitoring of restoration projects in order to ensure accurate biological responses to changes in ecosystem processes.
- Secondary Production
- Invertebrate
- Hydrology
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Presenters/Authors
Holden Reinert
(), Montana State University, jholdenreinert@gmail.com;
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Lindsey Albertson
(), Montana State University , lindsey.albertson@montana.edu;
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