Fig. 3 Concentrations of BMAA in animal samples of mollusks and crustaceans. The unit of BMAA concentration is μg g^-1wet weight of anamials collected from Jiaozhou Bay during four seasons. Boxplots summarizing the concentration of BMAA distributions (total soluble form) in bivalve and gastropod mollusks and crustaceans. Boxes and whiskers cover 50% and 1.5 times the interquartile range of the data respectively.