2022 Early Hearing Detection & Intervention Virtual Conference

March 13 - 15, 2022

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5/22/2018 | 2:30 PM - 2:45 PM | LONG-TERM STREAM RESTORATION EFFECTS ON ECOSYSTEM FUNCTIONS IN COASTAL PLAIN STREAMS. | 330 B

LONG-TERM STREAM RESTORATION EFFECTS ON ECOSYSTEM FUNCTIONS IN COASTAL PLAIN STREAMS.

Instream restoration through coarse woody debris (CWD) addition is a low-cost and simple process that increases retention of organic matter, increases hydrologic complexity, and decreases water velocities. Few restoration projects evaluate efficacy after restoration, and even fewer look at long-term (decadal) responses. Here, we evaluate the long-term efficacy of initial stream restoration 14 years later. Four streams within Fort Benning Military Installation (FBMI), GA were restored with the addition of CWD dams in 2003 and evaluated 1-3y later. Following restoration, nutrient uptake and stream metabolism rates increased, whereas water quality metrics did not change, as compared to 3 unrestored streams. Beginning in spring 2017, we measured ammonium uptake, stream metabolism, and water-quality metrics in all 7 streams. Preliminary results suggest that ammonium uptake, stream metabolism, and water-quality metrics are within the ranges reported 1-3 y post-restoration. In spring and winter, ammonium uptake ranged from 0-0.082 mm/s. Gross primary production rates were low (<0.1 g O2/m2/d), and ecosystem respiration rates ranged from 0.25-198 gO2/m2/d. Data will be collected through fall 2018. Our year-long dataset will be one of the few that assess the long-term efficacy of restoration on stream ecosystem function.

Metabolism
Nutrients
Restoration

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Presenters/Authors

Sam Bickley (), Auburn University, slb0035@auburn.edu;