2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
6/08/2017 | 12:15 PM - 12:30 PM | PHASED RECOVERY OF MACROINVERTEBRATES FOLLOWING CHANNEL RECONFIGURATION RESTORATION | 302A
PHASED RECOVERY OF MACROINVERTEBRATES FOLLOWING CHANNEL RECONFIGURATION RESTORATION
Our understanding of ecological responses to stream restoration involving channel reconfiguration is incomplete. While the goal of many restoration projects is to recover natural macroinvertebrate communities, studies document that channel reconfiguration acts as a disturbance. We proposed that different responses result, in part, from restoration initiating ecosystem development within benthic and riparian zones, which manifests as phased recovery of macroinvertebrate communities. Such temporal variation complicates assessment of restoration success. We compared habitat, canopy cover, periphyton, and macroinvertebrate communities to reference conditions at three sites across three predicted recovery phases- <2, 2 – 15, and >15 years since implementation. Sites showed no significant difference in habitat condition from restored to reference. Sites in the second phase displayed reduced canopy cover (4.6% vs. 67.3%) and greater algal standing crops (73.4 vs. 26.9 mg/m2 as chlorophyll a). Macroinvertebrate communities at reduced canopy sites are characterized by increased percentage of chironomidae and decreased taxa richness, shredder abundance, and biotic index scores. Our results suggest that ecosystem development occurs following restoration and that desired macroinvertebrate response will likely not occur until associated recovery processes stabilize.
- C16 Restoration Ecology
- C03 Invertebrates
- S26 Biological Success Criteria for Stream Restoration Project Monitoring: Are We Still Searching for Unicorns?
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Presenters/Authors
Jacob Dyste
(), University of Montana, Systems Ecology, jdyste@gmail.com;
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Marc Peipoch
(), Stroud Water Research Center, mpeipoch@stroudcenter.org;
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H. Maurice Valett
(), University of Montana, Division of Biological Sciences, maury.valett@umontana.edu;
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