Recurrent vernal presence of the toxic Alexandrium tamarense/Alexandrium fundyense (Dinoflagellata) species complex in Narragansett Bay, USA.

Highlights: [•] Alexandrium tamarense and Alexandrium fundyense from Narragansett Bay, RI, USA are identified via thecal plate morphology and molecular analysis. [•] A suite of toxins (C1/2, B1 (GTX-5), STX, GTX-2/3. Neo, and GTX-1/4) are identified in both A. tamarense (6.31fmolcell−1 STX equivalent) and A. fundyense (9.56fmolcell−1 STX equivalent) isolated from Narragansett Bay. [•] First report of regular appearance of the A. fundyense/A. tamarense species complex in Narragansett Bay. [Copyright &y& Elsevier]