Seawater carbonate chemistry and oyster growth and shell properties within a year monitoring at two distinct depths in Coliumo Bay

In a year-long study, Pacific oysters (Magallana gigas) were monitored at two depths (1.5m, 6.5m) in a Coliumo Bay affected by coastal upwelling. Surface waters exhibited warmer, well-oxygenated conditions and higher chlorophyll-a concentrations, while at depth greater hypoxia and acidification events occur, especially during upwelling.