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Spatiotemporal variations of benthic macrofaunal community in the Xiamen Amphioxus Nature Reserve, eastern South China Sea

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Acta Oceanologica Sinica 2020年第6期39卷 10-18页

作者： Yiyong Rao Lizhe Cai Wenjun Li Xinwei Chen Deyuan Yang College of the Environment and Ecology Xiamen UniversityXiamen 361102China Key Laboratory of the Coastal and Wetland Ecosystems(Xiamen University) Ministry of EducationXiamen 361102China

In order to realize the spatiotemporal variations of benthic macrofaunal communities at the"Amphioxus Sand"habitat,six surveys including four seasons and three consecutive summers(i.e.,2014,2015 and 2016)were conducted in two core sites,i.e.,Huangcuo(HC)and Nanxian-Shibaxian(NX),in the Xiamen Amphioxus Nature Reserve in China.A total of 155 species of macrofauna were recorded,therein,polychaetes were dominant in terms of species number and *** spatiotemporal variations of macrofaunal communities were *** density of polychaetes and the biomass of molluscs in the HC site were higher than those in the NX *** were more diverse and abundant in the cold seasons(winter and spring)than that in the warm seasons(summer and autumn).The annual variations of macrofaunal communities may be attributed to the changes in sediment texture among the three years of the *** variations in macrofaunal communities were mainly related to the proportion of polychaetes within the *** addition,the density of amphioxus(include Branchiostoma japonicum and ***)was negatively correlated to that of polychaetes,bivalves,and *** was less likely to be found in the sediments with higher silt and clay *** biotic indices including Margaref’s richness index(d),Peilou’s evenness index(J′),Shannon-Wiener diversity index(H′),AMBI and M-AMBI were calculated in the present *** seems suitable in assessing benthic health at the"Amphioxus Sand"habitat,and a potential risk of ecological health in Xiamen Amphioxus Nature Reserve should be aware.

关键词： spatiotemporal variation Amphioxus Sand benthic macrofaunal community Branchiostoma biotic index

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