Salinity

Total nitrogen (g/kg)

9

1.646 ± 0.042 ^f

12

1.264 ± 0.037^e

15

0.958 ± 0.020^d

18

0.737 ± 0.023 ^c

21

0.508 ± 0.018 ^a

24

0.495 ± 0.013 ^a

27

0.527 ± 0.017 ^a

30

0.635 ± 0.016^b

33

0.653 ± 0.025^b