海州湾人工鱼礁大型底栖生物调查

Investigation on the macrobenthos of artificial reefs area in the Haizhou Gulf

海州湾人工鱼礁建设已经开展了4年,为了解海州湾人工鱼礁投放前后礁区大型底栖生物的变动情况,对礁区大型底栖生物资源进行了调查。结果表明:海州湾人工鱼礁海域共鉴定出大型底栖生物94种,其中软体动物、甲壳动物和鱼类是构成人工鱼礁大型底栖生物的主要类群,三者占总种类数的88.30%。投礁前人工鱼礁海域共调查发现大型底栖生物32种,投礁一年后增加到38种,投礁后第四年增加到44种。投礁前人工鱼礁海域大型底栖生物平均生物量和栖息密度分别为0.560 3 g/m2和0.207 5 ind/m2,投礁一年后平均生物量和栖息密度分别增加到1.127 g/m2和0.387 5 ind/m2,投礁后第二年和第四年的平均生物量和栖息密度也均高于投礁前。投礁前人工鱼礁海域大型底栖生物群落结构相对稳定,投礁后底栖生物群落系统出现扰动,鱼礁区的底栖生物群落系统处于一个暂时波动状态。

The artificial reef construction of Haizhou Gulf has been carried out for four years, in order to understand the variation of macrobenthos in the gulf aroung casting the reefs, the investigation on the macrobenthos＇ resources of the gulf has been put into effect. It came to the conclusion that a total of 94 kinds of macrobenthos have been identified, Mollusca, Crustacea and fish were the dominant groups, amounted to 88.3% of th total. There are 32 kinds of macrobenthos before casting the reefs, added up to 38 after casting the reefs for 1 year, to 44 after 4 years later. The average biomass and individual density was 0.560 3 g/m2 and O. 207 5 inds./m2 before casting the reefs, after casting the reefs for 1 year, the average biomass and individual density was respectively added to 1. 127 g/m2 and 0. 387 5 inds./m2. The average biomass and individual density of 2 and 4 years after casting the reefs were more than those of before the casting reefs.Commumity of macrobenthos on artificial reefs in the Haizhou Gulf were relatively stable before casting the reefs, but appeared some disturbance after casting the reefs and situated in the state of temporal fluctuation.