Meizhou Bay,to the east of the Taiwan Strait,is situated in the middle of the Fujian Province Coast.To assess the environmental impact of construction projects in Meizhou Bay,16 sections in the intertidal zone and 50 sampling stations in the shallow sea of Meizhou Bay were taken to survey the benthos from May 2007 to May 2010,according to The Specification for Marine Monitoring(GB 17378.7-2007).Species diversity and ecological characteristics of polychaetes were studied from polychaete samples.The analysis showed that 177 species of polychaetes,belonging to 112 genera in 41 families,were identified in total,and the polychaete fauna of Meizhou Bay was found to have similar tropical and subtropical characteristics with that of the Taiwan Strait.In intertidal zone of Meizhou Bay,the number of species of polychaetes contributed to 31.65%~48.11% of the benthos at each section.The proportion of polychaete biomass to the total benthos biomass was 2.22%~40.86%.The proportion of inhabiting density of polychaete to the total benthos was 19.27%~76.81%.Meanwhile,in the shallow sea of Meizhou Bay,the proportions of polychaetes in the number of species,biomass,and inhabiting density of the benthos were 42.11%~73.47%,0.96%~92.99%,44.95%~87.72%,respectively.In this study,the role of polychaetes in the composition of species and abundance of benthos in the sampling area was analyzed.The ecological characteristics of polychaete-like diversity index were analyzed,providing ecological data on polychaetes for the ecological monitoring and environmental protection of Meizhou Bay.
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