Pseudo-nitzschia blooms occur from May to September along the English Channel/Atlantic French coast.
Irradiance and temperature play a major role on Pseudo-nitzschia blooms initiation in spring.
Intense Pseudo-nitzschia spp. blooms is a prerequisite for king scallop contamination by domoic acid.
ASP events tend to be more frequent in bays strongly influenced by riverine inputs and/or transitional upwelling.
Large-scale climatic events could stimulate toxic Pseudo-nitzschia blooms and toxicity.