2023 Early Hearing Detection & Intervention Conference

March 5-7, 2023 • Cincinnati, OH

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5/26/2021 | 8:30 AM - 10:30 AM | Big Water, Big Nutrients. The tale of legacy Phosphorus in Lake Okeechobee | Virtual Platform

Big Water, Big Nutrients. The tale of legacy Phosphorus in Lake Okeechobee

Lake Okeechobee provides essential ecosystem services that are threatened by current and historic excessive inputs of phosphorus (P), influencing endo- and exogenic processes leading to fish-kills, hypoxic events, algal blooms, and degraded aquatic habitat. Over the last decade and a half, nutrient loading to the lake has significantly increased. Utilizing the long-term ambient monitoring network, this study evaluated water column total nitrogen (TN), total P (TP), and chlorophyll-a (Chl-a)and identified significantly declining trends in TN and Chl-a, and increasing trends in TP. Additionally, over the last 30 years, data from four spatially explicit lake sediment surveys indicate sediment N and P concentrations vary spatially and temporally. The nutrient balance of Lake Okeechobee and the understanding of endo and exogenic drivers of nutrient mobilization are important to aid in the restoration of the Lake and the Greater Everglades. As restoration activities progress, it is expected that nutrient inputs to the lake will decline. However, given the volume of N and P stored in the lake's sediments, internal loading could result in delayed improvements to nutrient concentrations within the Lake.

Biogeochemistry
Restoration
Anthropogenic

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Presenters/Authors

Paul Julian (), Whitney Laboratory for Marine Bioscience - University of Florida, pjulian@ufl.edu;