2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/26/2021 | 8:30 AM - 10:30 AM | ADDING LEAF DETRITUS MODIFIES ECOSYSTEM PROCESSES DURING RESTORATION OF AGRICULTURAL STREAMS | Virtual Platform
ADDING LEAF DETRITUS MODIFIES ECOSYSTEM PROCESSES DURING RESTORATION OF AGRICULTURAL STREAMS
Riparian management in agricultural landscapes can reduce sediment and nutrient inputs and restore forested vegetation and associated leaf detritus and shading to streams. While fencing and bank stabilization might improve water and habitat quality quickly, riparian reforestation requires several years for vegetation to become established and grow. Augmenting detritus in agricultural streams could be an effective, low-cost addition to riparian management to accelerate ecological recovery of biological communities and ecosystem processes. We added leaf detritus, in amounts equal to forested streams, in a single pulse to an agricultural stream undergoing channel and riparian management to jump-start recovery of detritus processing and improve retention of nutrients. Leaf breakdown was faster in agricultural stream reaches with active riparian and channel management than in a non-restored agricultural reach, but it remained slower than a forested reference stream and was not enhanced by detritus addition in the restored agricultural stream. However, addition of leaf detritus increased phosphorus uptake, reducing uptake lengths by 50% compared to pre-addition and to restored reaches of the same agricultural stream without added detritus. Uptake lengths remained more than 4x longer in the detritus-enhanced agricultural reach than the forested stream.
- Ecosystem functioning
- Decomposition
- Nutrient cycling
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Presenters/Authors
Matthew McTammany
(), Bucknell University, mmctamma@bucknell.edu;
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Jordan Isaacs
(), Bucknell University, jmi004@bucknell.edu;
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Rebecca Kelly
(), Bucknell University, rfk012@bucknell.edu;
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