2022 Early Hearing Detection & Intervention Virtual Conference

March 13 - 15, 2022

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5/21/2019 | 9:30 AM - 9:45 AM | WHAT ARE THE LONG-TERM EFFECTS OF HABITAT AUGMENTATION ON BIOTIC COMPOSITION OF STREAMS DRAINING LONGLEAF PINE FORESTS? | 150 G

WHAT ARE THE LONG-TERM EFFECTS OF HABITAT AUGMENTATION ON BIOTIC COMPOSITION OF STREAMS DRAINING LONGLEAF PINE FORESTS?

Low-gradient, sandy-bottom streams are typical of longleaf pine forests in the Coastal Plain of the Southeastern US. Contemporary and historical landscape disturbance in this area can alter hydrologic regimes, increase sedimentation and ultimately reduce habitat quality for associated organisms. In-stream coarse woody debris (CWD) additions are a common restoration approach for these systems; however, little research has examined long-term (>10y) effects of such restoration. In 2003, CWD was experimentally added as z-shaped debris dams to 4 streams within the Fort Benning Military Installation, GA (FBMI) and compared to 3 unrestored FBMI streams to evaluate benthic organic matter, macroinvertebrate, and fish response to restoration as CWD addition. Preliminary analyses of 2017 data suggest seasonal variability with benthic organic matter but no strong treatment effect. Further, there are no strong differences between restored and unrestored streams in terms of macroinvertebrate diversity or composition structure, however richness is slightly higher in restored streams, and fish abundance is significantly higher in restored (v. unrestored) streams. These results suggest CWD additions may be effective but there are strong site-specific responses and beneficial effects may require extended time frame to manifest.

Invertebrate
Fish
Monitoring

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Presenters/Authors

Daniel Isenberg (), Troy University, djisenberg94@gmail.com;