Seasonal and intratidal distribution of Dinophysis spp. in a Chilean fjord

▶ Seasonal variability in D. acuminata is influenced mainly by the saline stratication. ▶ Diel variability is influenced by the tidal effect and vertical density gradients. ▶ Decreases in shear instabilities increases in D. acuminata concentrations. ▶ Higher concentrations of D. acuminata were observed around the pycnocline.