Study on species diversity of macrobenthic fauna in the coastal waters of Qingdao

We surveyed the macrofauna diversity at 15 sampling stations in the coastal waters of Qingdao during 3 cruises from Jan.2007 to Oct.2007.In analyzing the data,the Shannon-Wiener index,species evenness and richness indices are used to study the distributional trends of community structure,the distributional trends of species assemblages,dominant species and abundance of macrobenthic fauna in the coastal waters of Qingdao.A total of 226 species macrobenthic were obtained,of which 119 of Polyehaeta,58 of Crustaeea,23 of Mollusca and 12 of Echinodermata.The dominant species are Callianassa japonica,Sigambra bassi etc.The number of species was about 2～52 per sample station.The lowest number,2 species,was found in S2.The maximum number,52 species,was found in S15.There was great difference of Shannon-Wiener index between each sample,the highest was 3.35,recorded in Oct.2007 from S12,the lowest was 0.33,recorded in Jan.2007 from S2.Margalef's richness index (D) demonstrated distinct seasonal variations:they were lower in January and higher in October.