福建连江县东南部海域贝类生产区域类别划分方法初探

本文根据2009年4、6和8月,连江县东南部海域贝类生产区海水、表层底泥和养殖贝类体中有毒有害物质的生态环境调查资料,采用贝类生产区域海水、底质和养殖贝类构成的贝类养殖生态环境质量的综合指数,对连江县东南部海域46个贝类生产区域进行类别划分。结果表明:连江县东南部海域46个贝类生产区均为二类区,其中2a类区14个、2b类区24个、2c类区8个,总面积3 008 hm2。2c类区主要分布于闽江口滩涂水域的缢蛏生产区,这与连江县贝类生产区的生态环境现状调查结果较为吻合。研究还将采用贝类养殖生态环境质量综合指数对贝类生产区域类别划分的结果,与农业部指定的用贝类体中大肠杆菌数量的单一指标划分贝类生产区域的类别进行比较。结果表明,用大肠杆菌数量单一指标划分的贝类生产区,除了后才里湾部分贻贝生产区属于二类区外,其余均属于一类区,与采用贝类养殖区生态环境综合指数划型的结果有一定的差别。

Preliminary study on the classification method of shellfish-culture areas in Lianjiang southeast sea area,Fujian

According to the data of environmental survey on harmful substances in seawater,surface sediments and cultured organisms from shellfish-culture areas of Lianjiang southeast sea area in April,June and August in 2009,ecological environment quality of shellfish-culture areas was classified by the shellfish culture ecological environment quality synthesis assessment index method.The results showed that all the 46 areas with the area of 3 008 hm2 belonged to the second class.There were 14 areas belonged to 2a class,24 areas belonged to 2b class and 8 areas belonged to 2c class,which corresponded with the investigation on the state of eco-environment in shellfish-culture areas of Lianjiang.The classification of shellfish-culture area was compared with the synthesis assessment index method and the single parameter assessment method of escherichia coli quality,the results indicated that all the areas belonged to the first class except the mytilus edulis culture area belonged to the second class in the Houcaili Bay by the single parameter assessment method of escherichia coli quality.These results had certain disparites with the classification by the synthesis assessment index method.