2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/26/2021 | 8:30 AM - 10:30 AM | NUTRIENT LIMITATION OF BENTHIC ALGAE VARIES WITH PROXIMATE LAND USE IN A RESTORED TALLGRASS PRAIRIE STREAM | Virtual Platform
NUTRIENT LIMITATION OF BENTHIC ALGAE VARIES WITH PROXIMATE LAND USE IN A RESTORED TALLGRASS PRAIRIE STREAM
Prairie streams in the Great Plains drain watersheds with mosaics of land use, but the impact of such spatially heterogeneous riparian vegetation on nearby streams remains underexplored. Glacier Creek, Nebraska, USA, drains two sub-watersheds with agriculture and restored prairie, where a previous study indicated higher rates of primary production even in low-light conditions within the agricultural sub-watershed, vs. higher heterotrophic respiration near the restored prairie. Here, we examined spatial heterogeneity of nitrogen (N) vs. phosphorus (P) limitation of benthic algae using nutrient diffusing substrata (NDS) placed within 3 50-m reaches of Glacier Creek with differing proximate land use: restored prairie, agriculture, and downstream of the confluence of these two reaches. Autotrophs were inhibited by N (ln-response ratio [lnRR] = -0.76] and P (lnRR = -0.15) in the agricultural reach, despite having lower average streamwater nutrient concentrations in this reach. Conversely, restored prairie and confluence reaches showed stronger P-limitation (lnRR = 0.37, 0.57) when compared to N (lnRR = -0.04, 0.44). These results provide important context to how nearby agricultural vs. restored prairie land use affects patterns of algal nutrient limitation in small grassland streams, particularly those that contain prairie restoration.
- Stream restoration
- Stream
- Land use
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Presenters/Authors
Jessica Rodino
(), University of Nebraska at Omaha, jessrodino@gmail.com;
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David Manning
(), University of Nebraska at Omaha, davidmanning@unomaha.edu;
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Andrew Miller
(), University of Nebraska at Omaha, andrewmiller@unomaha.edu;
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