Marine Pollution Bulletin, Journal Year: 2025, Volume and Issue: 214, P. 117798 - 117798

Published: March 15, 2025

Estuaries are dynamic environments that provide vital habitat to ecologically and commercially important bivalves. In some cases, freshwater tributaries can introduce cyanobacteria associated cyanotoxins into estuaries may subsequently accumulate in estuarine Temporarily open/closed (TOCEs), which only experience tidal input for limited periods of time, be particularly vulnerable the accumulation bivalves as they subject without flushing lower salinities cyanobacterial blooms. This study quantified levels microcystin collected a time series over five-year period (2017-2021) from Mecox Bay, TOCE on Long Island, NY, USA, hosts productive oyster fishery is downstream body microcystin-producing During study, was detected all monitored including Eastern oysters (Crassostrea virginica), blue mussels (Mytilus edulis), soft-shell clams (Mya arenaria), with exceeding those other species frequently 10 ng g-1, California regulatory action level tissue. While were capable depurating 60-90 % after four-to-six weeks during summer, loads often peaked cooler months water column had seasonally declined, suggesting toxin depuration slowed at colder temperatures. Multiple linear regression models established time-integrated measurements pelagic concentrations locations, temperature (inverse correlation), salinity highly significant (r2 = 0.71; p < 0.001) predictive power content oysters. These findings demonstrate bivalves, oysters, TOCEs located blooms contamination, especially fall when temperature-dependent rates likely slow.

Language: Английский