2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/25/2021 | 8:30 AM - 10:30 AM | EFFECTS OF LITTORAL VEGETATION ON PHYTOPLANKTON NUTRIENT LIMITATION AND COMMUNITY STRUCTURE IN SOUTH FLORIDA URBAN STORMWATER PONDS | Virtual Platform
EFFECTS OF LITTORAL VEGETATION ON PHYTOPLANKTON NUTRIENT LIMITATION AND COMMUNITY STRUCTURE IN SOUTH FLORIDA URBAN STORMWATER PONDS
Urban stormwater wet ponds (SWPs) are common stormwater management systems that can experience algal blooms as a result of urban nutrient loadings. Traditional SWP designs often maintain turfgrass to the water’s edge, and do not allow for natural or ornamental vegetation in the littoral shelf. However, littoral vegetation may benefit urban ponds by reducing open-water nutrient (nitrogen (N), phosphorus (P)) availability and by providing habitat for phytoplankton consumers. Using in-situ bioassays, we quantified phytoplankton growth (biomass) and functional (N-fixation) responses to six nutrient treatments (control, NO3-, NH4+, PO43-, NO3-+PO43-, NH4++ PO43-) in SWPs with/without littoral vegetation. Phytoplankton biomass was quantified as chlorophyll-a concentrations and N-fixation rates assessed via membrane inlet mass spectrometry. We predict higher N limitation in vegetated ponds due to increased competition with macrophytic N uptake but that N+P combinations will support higher phytoplankton growth than N or P alone. Further, N treatments will exhibit lower N-fixation rates. This study can provide support for implementing biological management strategies that add aesthetic value, reduce nutrient runoff, and mitigate pond blooms harmful to public health.
- Nutrients
- Management
- Biological interactions
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Presenters/Authors
Audrey Goeckner
(), University of Florida, agoeckner@ufl.edu;
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Alexander Reisinger
(), University of Florida, reisingera@ufl.edu;
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Ashley Smyth
(), University of Florida, ashley.smyth@ufl.edu;
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Michelle Atkinson
(), UF IFAS Extension, michelleatkinson@ufl.edu;
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