|
Primary food source
|
Upper estuarine zone
|
Middle estuarine zone
|
Lower estuarine zone
|
|---|
|
δ13C
|
δ15N
|
δ13C
|
δ15N
|
δ13C
|
δ15N
|
|---|
|
Sediment POM
|
− 23.9 ± 0.7 (3)
|
6.8 ± 0.2 (3)
|
− 23.3 ± 0.5 (3)
|
6.9 ± 0.2 (3)
|
− 22.9 ± 0.7 (3)
|
6.4 ± 0.3 (3)
|
|
Periphyton
|
− 23.4 ± 0.3 (3)
|
5.4 ± 0.4 (3)
|
− 22.75 (2)
|
6.2 (2)
|
− 19.9 (2)
|
6.9 (2)
|
|
Microphytobenthos
|
− 20.6 (1)
|
3.7 (1)
|
− 20.5 (1)
|
3.6 (1)
|
− 20.2 (1)
|
4.0 (1)
|
|
Filamentous green algae
|
–
|
–
|
− 22.0 (2)
|
6.0 (2)
|
− 21.6 ± 1.4 (4)
|
6.1 ± 0.3 (4)
|
|
Macro-algae (Sargassum sp.)
|
–
|
–
|
–
|
–
|
− 16.8 (2)
|
3.0 (2)
|
|
Sea grass
|
–
|
–
|
–
|
–
|
− 13.7 ± 1.0 (3)
|
4.0 ± 0.2 (3)
|
|
C4 grasses
|
− 12.9 ± 0.3 (5)
|
5.2 ± 1.2 (5)
|
–
|
–
|
–
|
–
|
|
C3 Mangrove plant
|
–
|
–
|
− 28.4 ± 1.2 (8)
|
5.4 ± 1.8 (8)
|
− 28.7 ± 0.8 (7)
|
3.9 ± 1.9 (7)
|
|
C3 plant
|
− 28.1 ± 1.3 (5)
|
6.5 ± 2.5 (5)
|
− 27.9 (1)
|
5.71 (1)
|
–
|
–
|
- Sample size = n for each autotrophic group is indicated in brackets. When n < 3 standard deviation values are not given
- δ13C Carbon isotope ratio, δ15N nitrogen stable isotope ratio, sPOM surface sediment particulate organic matter
