文章摘要
章守宇.海州湾人工鱼礁海域生态环境的变化[J].水产学报,2006,30(4):475~480
海州湾人工鱼礁海域生态环境的变化
Change of ecological environment of artificial reef waters in Haizhou Bay
投稿时间:2008-05-28  修订日期:2008-05-28
DOI:10.3724/SP.J.00001
中文关键词: 人工鱼礁  生态环境  海州湾
英文关键词: artificial reef  ecological environment  Haizhou Bay
基金项目:国家自然科学基金(30471332)
作者单位E-mail
章守宇 上海水产大学海洋学院 syzhang@shfu.edu.cn 
摘要点击次数: 1903
全文下载次数: 1953
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 habit at environment, and conserve fishery resources, the local government carried out a project of “Artificial Reef Construction in Haizhou Bay” from the beginning of 2002. 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 Haizhou 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 km2 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 and near 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 near waters in 2003-2004. The survey result reveals that the upwelling produced by the deployment of ARs will bring nutritive salt such as nitrogen to upper levels, with the nitrogen content in bed mud in artificial reef area dropping to 85.7% of that before ARs deployment, while in the control area the content remains the same during the same season; at the same time, nutritional level indexes in AR area increase after ARs deployment, with 28.1% and 15.9% larger than that of the control area in autumn and winter respectively, therefore the water quality in AR area changes from nitrogen restriction (with an average P∶N value of 7.4) before to phosphorus restriction (average P∶N value of 20.9) after ARs deployment. As to plankton, the similarity index decreases from highly similar 0.963 before ARs deployment to 0.863 after 3 months of ARs deployment and 0.685 after 7 months of ARs deployment in AR area and control area. Community structure as well as habitat environment have changed a lot; at the same time, the individual weight of zooplankton has increase obviously by 5 times larger in AR area than in reference area, this is very good for proliferation of fishery resources. In conclusion, the amendment benefits of artificial reefs on ecological environment in certain waters have been proved quantitatively.
HTML   查看全文   下载PDF阅读器
关闭

手机扫一扫看