Fig. 2 Concentrations of BMAA in phytoplankton and
zooplankton. The unit of BMAA concentration is μg g-1dry weight of biological samples collected from Jiaozhou Bay in (a)
January, (b) March, (c) June, and (d) September, respectively. LOD means
the concentration was lower than limit of detection, and ND means no
BMAA was detected in samples.