2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/21/2019 | 11:45 AM - 12:00 PM | NUTRIENT DYNAMICS IN AN URBAN FOREST FRAGMENT. | 151 ABC
NUTRIENT DYNAMICS IN AN URBAN FOREST FRAGMENT.
Abrupt transitions in riparian land use are a common feature of modern watersheds. In fragmented landscapes, forest remnants have the potential to ameliorate environmental conditions. Quantifying the temporal and spatial dynamics that modulate the biogeochemical reactivity in such transitions is key to estimate the potential of nutrient sequestration and retention of these remnants. In this study we examined the effects of flow regimes (hydrological opportunity) and temperature (biogeochemical reactivity) in the nutrient retention potential of a forest fragment within an urbanized catchment. The dataset is derived from a 3 year long weekly monitoring of nutrients in the Duke experimental forest. Along 1200 meters, NH4, NO3 and DOC were measured weekly in 7 sites along a 3-year period. We found higher input of nutrients summer days due to rainfall, as well as higher reactivity, with strong indication of nitrification. In general, the forested section was a net exporter export of both C and N. Export rates were lower in warmer temperatures for both total N and C. Export ratios of C and N were coupled in a 7.8 ratio and indicating strong biological modulation in nutrient export along the reach.
- Fragmentation
- Nutrients
- Aquatic-terrestrial Linkage
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Presenters/Authors
Rafael Feijó de Lima
(), University of Montana, rafael.feijo@mso.umt.edu;
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Emily Bernhardt
(), Duke University, ebernhar@duke.edu;
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Steven Thomas
(), School of Natural Resources, University of Nebraska-Lincoln, Lincoln, sthomas5@unl.edu;
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