岱山海域大型底栖动物多样性分析

Biodiversity of Macrobenthos of Sea Area in Daishan

文章利用2015年春季航次(5月)和夏季航次(8月)的大型底栖动物采泥调查资料,对岱山海域大型底栖动物的种类组成、丰度、生物量、优势种、多样性进行分析。主要研究结果如下:春季航次共采得大型底栖动物15种,夏季共采得大型底栖动物22种。类群涉及纽形动物、腔肠动物、环节动物多毛类、软体动物、节肢动物甲壳类、棘皮动物等。其中环节动物多毛类在两个航次中种数均为最高。岱山海域春季大型底栖动物优势种为:不倒翁虫、圆锯齿吻沙蚕、双鳃内卷齿蚕和金氏真蛇尾。夏季岱山海域大型底栖动物优势种类有:不倒翁虫、西方拟蛰虫和异足索沙蚕,其中不倒翁虫是两个调查季度月的共同优势种。岱山海域春季各站位平均丰度22ind./m^2,丰度范围为0~90ind./m^2。夏季各站位丰度范围0~165ind./m^2,平均38ind./m^2。春季各站位湿重生物量范围0~2.65g/m^2,平均0.81g/m^2。岱山海域夏季各站位湿重生物量范围0~16.25g/m^2,平均2.29g/m^2。岱山海域春季生物多样性指数(H′)在0~1.75,平均0.70;夏季生物多样性指数(H′)在0~1.75,平均0.67,季节间差异不明显。

Using the sampling data of Macrobenthos in spring（May）and summer（August）2015around the Daishan sea area,the species composition,abundance,biomass,dominant species,diversity were analyzed.The main results were listed as the follows.There were collected 15 species in Spring and 22 species in summer,which belong to Nemertean,Coelenterate,Annelid（Polychaetes）,molluscs,Arthropod,echinoderm and so on.Polychaetes were the species with highest quantities in two cruises.The dominant species of macrobenthos in spring at the Daishan sea area were Sternaspis scutata,Dentinephtys glabra,Aglaophamus dibranchis,and Ophiura kinbergi.The dominant species of macrobenthos in summer at the Daishan sea area were Sternaspisscuta ta,Amaeana occidentalis,and Lumbrineris heteropoda.sternaspis scutata were common dominantspecies in two cruises.The average abundance of all stations were 22 ind./m^2,abundance range were 0~90ind./m^2 in spring.The average abundance were 38 ind./m^2,abundance range were 0~165ind./m^2 in summer at Daishan sea area.The average biomass of all stations were 0.81g/m^2,biomass range were 0~2.65g/m^2 in spring.The average biomass were 2.29g/m^2,biomass range were 0~16.25g/m^2 in summer at Daishan sea area.The average biodiversity index value（H＇）of all stations were 0.70,range of biodiversity index value were 0~1.75 in spring.The average biodiversity index value（H＇）were 0.67,range of biodiversity index value were 0~1.75 in summer at Daishan sea area.There was no significant difference between seasons.