环境因子对大亚湾人工鱼礁上附着生物分布的影响

通过对深圳大亚湾人工鱼礁区7个月(2008-04～2008-10)挂板实验,同时监测相应的环境因子指标.以附着生物丰度数据进行了除趋势对应分析(DCA),并根据附着生物丰度数据和7个环境因子进行了典范对应分析(CCA).共鉴定出附着生物54种,物种鉴定结果表明实验试板上的常见种有华美盘管虫 (Hydroides elegans)、三角藤壶( Balanus trigonus)、细肋肌蛤(Musculus mirandus)等.DCA种类排序图可明显地看出每种附着生物都有自己的分布中心和分布区域;CCA分析结果表明深度、透明度、溶解氧是影响附着生物群落变化的最主要环境因子,其次是盐度和温度.CCA排序图较好地反映了人工鱼礁上附着生物分布与各环境因子的相互关系.

Canonical correspondence analysis between attaching organisms and environmental factors on artificial reef in the Daya Bay

Studies of panel experiment for attaching organisms were carried out in the Daya Bay,ShenZhen from April to October in 2008, and related environmental factors were tested. Detrended Correspondence Analysis(DCA) was performed based on the data of desity of attaching organisms, and the Canonical correspondence analysis (CCA) between the data of environmental factors and the density of attaching organisms was performed simultaneously. There were totally fifty\|four species identified. Results showed that the most common genera were Hydroides elegans, Balanus trigonus and Musculus mirandus. The results of DCA indicated that each attaching organism had its own distribution region; the results of CCA indicated that followed by temperature and salinity, depth, transparence and dissolved oxygen were the dominate factors in the distribution of attaching organisms,and CCA taxis fairly reflected the correlation between the distribution of attaching organisms and environmental factors.