Caribbean-Florida Water Science Center
Greater Everglades carbon and mercury flux assessments - Everglades National Park and Big Cypress National Preserve
Project Chief: Edwardo Patino
Figure 1. Map of the study area
USGS CFWSC employees collecting water samples used to develop surrogate models for carbon and mercury concentrations at S-12D monitoring station along Tamiami Trail.
Continuous and long-term hydrologic data collected throughout the Everglades ecosystem is essential to the development of restoration strategies and for the evaluation of restoration results. Carbon and mercury are two constituents of interest for Everglades restoration. Even though both carbon and mercury have been extensively studied in the Florida Everglades, there are no long-term (years) records of continuous (daily) concentrations of these constituents. When used as proxies, long-term continuous (time-series) sensor data can be used to estimate carbon and mercury concentrations, helping describe short and long-term variability. Continuous data on carbon concentrations, coupled with concurrent discharge records, can help describe the lateral carbon flux, which when linked to atmospheric carbon flux information, can be used to calculate the carbon budget for selected watersheds within the greater Everglades
The objectives of this study are to
Data from sensors that measure the fluorescence of dissolved organic matter (FDOM) have been used by Bergamaschi and others (2012) in the coastal Everglades to estimate both dissolved organic carbon (DOC) and mercury concentrations. Laboratory results and sensor data collected for this study will be used in the development of empirical models for estimating DOC, particulate organic carbon (POC), dissolved inorganic carbon (DIC), particulate inorganic carbon (PIC), and total and methyl mercury (dissolved and particulate) concentrations at selected locations within the Greater Everglades.
Collection of continuous sensor data
Collection of synoptic samples
Empirical model development
Bergamaschi, B.A., Krabbenhoft, D.P., Aiken, G.R., Patino, Eduardo, Rumbold, D.G., and Orem, W.H., 2012, Tidally driven export of dissolved organic carbon, total mercury, and methylmercury from a mangrove-dominated estuary: Environmental Science and Technology, v. 46, no. 3, p. 1371-1378. https://ca.water.usgs.gov/pubs/BergamaschiEtAl2011.pdf