Summer

Winter

POM size fraction

Phytoplankton type

Mean δ13C ± SD (‰)

Mean δ15N ± SD (‰)

Mean δ13C ± SD (‰)

Mean δ15N ± SD (‰)

20 - 63 μm POM

Blooming phytoplankton 20 - 63 μm

−19.03 ± 0.87 (n = 22)

6.83 ± 0.63 (n = 22)

No bloom

No bloom

Non - blooming phytoplankton 20 - 63 μm

−21.41 ± 1.48 (n = 10)

5.59 ± 1.21 (n = 10)

−22.07 ± 1.37 (n = 19)

6.27 ± 0.97 (n = 19)

0.7 - 20 μm POM

Blooming phytoplankton 0.7 - 20 μm

−21.49 ± 0.67 (n = 22)

6.66 ± 1.29 (n = 22)

No bloom

No bloom

Non - blooming phytoplankton 0.7 - 20 μm

−22.37 ± 1.10 (n = 10)

6.34 ± 1.03 (n = 10)

−23.84 ± 0.68 (n = 20)

6.87 ± 0.91 (n = 20)

Oceanic Total POM (>0.7 µm)

Oceanic phytoplankton (37, 48 and 118 km offshore-used for summer and winter)

−25.50 ± 1.38

(n = 3)

3.83 ± 1.66

(n = 3)