庙子湖岛人工藻礁修复示范区内外海域夏季大型底栖生物群落结构

Macrobenthos community structure in the artificial algal reef restoration zone and its adjacent areas of Miaozihu Island, East China in summer

2012年9月在庙子湖岛选择人工藻礁修复示范区及附近海域作为样地,开展了人工藻礁修复示范区内外大型底栖生物群落结构的潜水调查,分析了大型底栖群落的种类组成、空间分布和生物多样性。共发现大型底栖海藻14种,大型底栖动物70种,在所有种类中,暖温性种类占绝对优势,优势种为瓦氏马尾藻、铜藻、带偏顶蛤和厚壳贻贝。在水平和垂直空间尺度上,示范区内外海域间的种类组成无明显差异,而整个海域种类组成随水深的变化差异显著,种类随水深增加而减少,并随水深变化划分为A、B两群落。受潮流和波浪的影响,示范区内外海域的生物数量分布差异显著。示范区的丰富度指数为12.25、多样性指数5.726、均匀度指数0.928。大型底栖生物群落处于稳定状态。

Selecting the artificial algal reef restoration zone and its adjacent areas of Miaozihu Is- land as the sampling plots, a scuba diving investigation was conducted on the macrobenthos com- munities at three water depths in September 2012, with the species composition, spatial distribu- tion, and biodiversity of the communities analyzed. A total of 14 macro-benthic algal species and 70 macro-benthic faunal species were recorded, among which, warm-temperature species were overwhelmingly dominant, including Sargassum vachellianum, S. horneri, Modiolus comptus, and Mytilus coruscus. The species composition of the macrobenthos communities in the artificial algal reef restoration zone and its adjacent areas was similar, but could be divided into two differ- ent groups at different water depths. Under the effects of tidal current and wave, there was a sig- nificant difference in the quantities of macrobenthos between the restoration zone and its adjacent areas. The richness index, diversity index, and evenness index of the macrobenthos in the resto- ration zone were 12.25, 5. 726 and 0. 928, respectively. The abundance/biomass curves sugges- ted that the macrobenthos communities in the artificial algal reef restoration zone and its adjacent areas were relatively stable.