Fig. 4
Effect of sediment type on the sulfur stable isotope (δ34S) in the belowground tissue of seagrass Thalassia hemprichii. Different letters on column indicate significant difference (P < 0.05). 1:0, the in-situ sediment without combining with coarse beach sand was added in the tank; 1:1, the combination of half in-situ sediment and half coarse beach sand was added in the tank; 1:2, the combination of 1/3 in-situ sediment and 2/3 coarse beach sand was added in the tank