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Monitoring shows improving salinities and mixed local trends across the Indian River Lagoon
Summary
Regional monitoring reports presented April–May 2026 show salinity recovery after an April rain pulse, generally healthy dissolved-oxygen readings and mixed site-level nutrient signals; specialists flagged a sharp, localized drop in Caulerpa (a macroalga) tied to slug predation and called for continued monitoring.
Chair Hurd convened the management board meeting where St. Johns River Water Management District scientist Lorraine Simpson and South Florida Water Management District scientist Melanie Parker presented the latest monitoring through April 2026.
Simpson, presenting Northern and Central lagoon data, said a heavy April rain pulse raised district average rainfall to about 4 inches for the month and produced coincident drops in salinity at some nearshore sites, notably a Vero Beach station located just south of State Road 60 near the Main Relief Canal. Continuous stations show dissolved-oxygen concentrations remain above hypoxic thresholds for now; Simpson cautioned that rising temperatures…
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