中文摘要：

根据2003—2004年对海州湾人工鱼礁海域进行4个航次的调查结果，运用对比方法，分析了该海域的水质、底泥和浮游生物等在人工鱼礁投放前后的变化。结果表明，人工鱼礁投放所产生的上升流将沉积于底泥的氮营养盐携带至上层，使得鱼礁区的海水特性由氮限制转变为磷限制；鱼礁区与对照区点的浮游植物组成相似度由投礁前极高的0．963下降到投礁后3个月的0．863和7个月后的0．685，群落结构发生了较大变化；同时，鱼礁区的浮游动物个体增重率明显，达到了对照区的5倍之多，十分有利于渔业资源的增殖，人工鱼礁对于海域生态环境的改善作用得到了确认。

英文摘要：

Haizhou Bay, an open bay in the west coast of Yellow Sea, is of an area of 900 km^2, with hundreds of species （such as fish, shrimp, crab etc. ） colonizing in the waters. As one of the 8 greatest fishing grounds in history, Haizhou Bay had even seen the maximum fishery catches of 50 000 t during the period of 1980s. However, due to the over-fishing and destruction of spawning grounds and other habitats, fishery resources in Haizhou Bay have been declining from 1990s, with traditional economic species, such as hairtail, snapper sea bream, large yellow croaker, small yellow croaker as well as slender shad etc, not forming their regular fishing seasons. In order to improve fish habitat environment, and conserve fishery resources, the local government carded out a project of ＂Artificial Reef Construction in Halzhou Bay＂ from the beginning of 2（D2. As the first phase of the project, different types of concrete artificial reefs and vessel-reefs with a total volume of 13 000 cubic meters were deployed in the middle part of Halzhou Bay （ 119°28＇ - 119°29＇14＂E, 34°55＇ - 34°57＇ N） during the middle term of July, 2003, resulting in a fishing ground of about 10 km^2 area. So far, most studies on the habitat improvement function of artificial reefs have been qualitative, and very few quantitative researches have been reported. How to establish a certain quantitative relationship between building size of ARs and improvement degree of habitat is not only needed in evaluating artificial reef construction quantitatively, but also is one of the basic theories to decide scientifically the building size of artificial reefs in certain waters. As a trial of quantitative study on ecological benefits of artificial reefs, the variations of water quality, bottom mud as well as plankton etc was discussed. Between artificial reef area andnear waters before and after the deployment of artificial reefs in comparative ways, according to the results of 4 surveys carried out in Haizhou Bay artificial reef area and nea