海州湾大竹蛏资源保护区海水环境质量评价

根据2008-2013年夏季对海州湾大竹蛏国家级水产种质资源保护区表层海水营养盐、重金属以及相关环境因子的连续调查数据,运用综合质量指数法对该海域海水水质状况进行了综合评价,并运用潜在富营养化评价法和主成分分析法从不同方面分析了该海域的海水环境质量。结果显示,近6年海州湾调查海域海水环境质量均符合国家一类海水水质标准,属于尚清洁等级。根据营养化评价模式,2008年海州湾调查海域营养水平属磷限制潜在性富营养,2012年属贫营养。海水的N/P均大于Redfield值,表明调查海域受到磷限制。通过主成分分析,COD、As、DIN、Cu和Cd具有较高的正载荷,主要是有机污染、营养盐和重金属。海州湾调查海域核心区海水环境更易于受到污染,应当引起重视。

Environmental Quality Evaluation of Solen grandis Resources Protection Area in Haizhou Bay

Marine pollution and over-fishing have made China＇s offshore aquatic germ plasm resources suffering from damage in varying degrees, which have attenuated the ecological environment quality. However, the studies on the environmental quality evaluation of the national germ plasm resources protection areas are limited. In this study, we evaluated the water environment quality of the surface waters in Solen grandis germ plasm resource protection area of Haizhou Bay from 2008 to 2013. The comprehensive quality index, potential eutrophication assessment method and principal component analysis （PCA） were used to evaluate the water environment quality. Based on eutrophication evaluation model, the nutrients levels of the survey area were phosphorus limiting potential eutrophication in 2008 and poor nutrient in 2012. N/P values were higher than the Redfield ratio. According to the principal component analysis, COD, As, DIN, Cu and Cd had a higher positive load, demonstrating that organic pollution, nutrient and heavy metals were the dominant pollutants. These results suggest that the sea water environment quality in Haizhou Bay was classified as the first class sea water quality standard, and reached the clean level.