Abstract: The community structure and species diversity of macrobenthos in two national aquatic germplasm reserves of South Yellow Sea were studied based on the trawling macrobenthos of three seasons from August 2019 to April 2020. A total of 78 macrofauna species were identified, including 30 species of crustaceans, 25 species of fishes, 12 species of mollusks, 10 species of echinoderms and 1 species of polychaete. There was no seasonal variation in dominant species in the Reserve of Chinese Shrimp. Crustaceans were the dominant species in the Reserve of Silver Pomfret. Species diversity index differed between the two reserves only in summer (P<0.05). Ourresults provide basic data for the biodiversity research of reserves and technical support for the protection and sustainable utilization of fishery resources.

Key words: Haizhou Bay, Lvsi fishing ground, trawling macrobenthos, community composition, species diversity.