Trophic relationships in the Bohai ecosystem: preliminary investigation from δ~(13) C analysis Species Diversity and Eco-geographical Distribution of Dinoflagellate Cysts in the Bohai Sea, China Morphology, phylogenetic position and ecophysiology of Alexandrium ostenfeldii (Dinophyceae) from the Bohai Sea, China Comparative study on the changes of the Bohai Sea ecosystem structure based on Ecopath model between ten years Changes of phenolic acids in the soil of replanted apple orchards surrounding Bohai Gulf Biodiversity and neutral model analyses on nematode community in Bohai Sea, China Potential grain output and technology approaches in the plain around the Bohai Sea in Shandong Province A preliminary approach on mass-balance ecopath model of the Bohai Sea Feeding habit and seasonal variation of ingesting of left-eyed flounder in south Bohai Sea A preliminary study on the distribution characters of plant community in Bohai seashore plain Preliminary Comparative Researches on the Species Composition of Freeliving Marine Nematodes in Different Occasions in the Bohai Sea The netz-phytoplankton community of the central Bohai Sea and its adjacent waters in autumn, 1998 The netz-phytoplankton community of the Central Bohai Sea and its adjacent waters in spring 1999 The chlorophyll a concentration and estimating of primary productivity in the Bohai Sea in 1998~1999 Distribution of Synechococcus in the Bohai Sea in Autumn and Spring Pollution status of the Bohai Sea and control countermeasures