日照市养殖海域秋季底栖动物的群落特征分析

Community Features of Macrobenthos in Autumn in Rizhao Sea Area of Shandong Province

通过对9月日照市海域大型底栖生物的采样调查,对其种类组成、类群的分布、生物量及多样性等进行了分析,结果表明该海域大型底栖生物调查共发现底栖生物35种,以多毛类、甲壳类动物和软体动物出现的种类最多,约占总种类数量的91%。栖息密度以多毛类最高,2个站点生物量差异较大,多样性指数和均匀度都较高,相差不大。

The characteristics of species composition, quantity distribution and biodiverslty of maerobenthos in the sea area of Rizhao in September were analyzed. The results indicated that there were totally 35 species in the 2 investigated sites. Species of filose, mollusk and crustacean were the richest, and comprised about 91% of all species. The average biomass was very differently in 2 sites, respectively. The filose contributed to the biggest density, respectively. The Shannon-Wiener diversity index （H）and the evenness （J）were at a high level.