Expansion of HAB problems in the US
These maps depict the HAB outbreaks known before (top) and after
(bottom) 1972. This is not meant to be an exhaustive compilation of all events,
but rather an indication of major or recurrent HAB episodes. In addition to the
toxic imapcts shown, harmful micro- and macroalgal species have caused whale and
other marine mammal mortalities, occasional anoxia, habitat destruction, and a
general decline in coastal aesthetics in many coastal areas during the last 20
years. Neurotoxic shellfish poisoning = NSP, paralytic shellfish poisoning = PSP,
and amnesic shellfish poisoning = ASP. From Anderson ,1995