Study on the amendment of physicochemical properties of tidal flat soil by using sewage sludge DISTRIBUTION OF CHLOROPHYLL AND BENTHIC DIATOMS IN THE INTERTIDAL FLAT AROUND XIAMEN Toxicity risks to the closed tidal flat ecosysten of a PCBs waste savepoint at the coast of Zhejiang Benthic Diatoms from the Tidal Flat of Shanghai, China, during 2005 Summer Food supply in intertidal area for shorebirds during stopover at Chongming Dongtan, China Annual Dynamics of Nutritive Components in the Leaves of Hippophae rhamnoides subsp. sinensis Growing on the Tidal Flat of Yancheng Seasonal changes of potassium, calcium, and magnesium and their accumulation in different phenotype Suaeda salsa communities in a tidal flat of the Yellow River estuary Effect of rich organic matter on Paraprionospio pinnata (Polychaeta:Spionidae) on Futian tidal flat in Shenzhen Bay