Station number

Average concentrations (µg/g) dry weight

Winter

Spring

Summer

Autumn

1

1.04

0.84

1.54

1.05

2

0.55

0.41

0.74

0.55

3

0.25

0.20

0.33

0.25

Mean

0.61

0.48

0.87

0.61

±SD

0.1

0.07

0.18

0.11