Fig. 1
a Design of the sampling device used in the present study. b Dissolved oxygen profiles at different layers of sediments. AEZ aerobic zone, HYZ hypoxic zone, ANZ-1 up-anoxic zone, ANZ-2 sub-anoxic zone
Fig. 1 | AMB Express
a Design of the sampling device used in the present study. b Dissolved oxygen profiles at different layers of sediments. AEZ aerobic zone, HYZ hypoxic zone, ANZ-1 up-anoxic zone, ANZ-2 sub-anoxic zone