The diversity of benthic macrofauna on mud flat in Dongzhaigang Mangrove Rserve, Hainan
海南东寨港红树林滩涂大型底栖动物多样性的初步研究

This paper reported the results of investigation on benthic macrofauna on mud flat in Dongzhaigang Mangrove Reserve, Hainan. Sixty eight species of benthic macrofauna, belonging to six Phyla, 34 families were found. The dominant species were Cerithidea cingulata , Batillaria cumingi, Cyclotellina remies and Potamocorbula rubromuscula of Mollusca. The mean biomass of benthic macrofaunu in summer and in winter was 133.0 g/m 2 and 63.0 g/m 2, respectively. The mean densities were 106.4 ind./m 2 in summer and 103.5 ind./m 2 in winter. The species diversity indexes of benthic macrofaunu in summer and in winter were 1. 841 and 0.380, respectively. The species evenness indexes were 0.514 and 0.113, respectively. The biomass diversity indexes of benthic macrofaunu were 1.994 in summer and and 1.751 in winter. The biomass evenness indexes were 0.556 and 0.520, respectively. The biomass, density, species diversity index and biomass diversity index of benthic macrofauna varied with season and substrate. All these values were greater in summer than in winter, greater in sand mud substrate than in mud substrate.