白洋淀地区污染状况的生物毒性评价

Assessment of the pollution state by toxic bioassay of water samples from Baiyangdian catchment

从１９９２年１０月到１９９４年４月先后几次对白洋淀集水区，包括淀区及排污河道等十几个样点进行了水样采集和多指标生物毒性检验。选用的生物组合包括：荧光发光菌（Ｐｈｏｔｏｂａｃｔｅｒｉｕｍｐｈｏｓｐｈｏｒｕｍ）、斜生栅藻（Ｓｃｅｎｅｄｅｓｍｕｓｏｂｌｉｑｎｕｓ）和大型（Ｄａｐｈｉｎｉａｍａｇｎａ），罗非鱼（Ｔｉｌａｐｉａｍｏｓｓａｍｂｉｃａ）鱼肝细胞毒性检验，结果表明大部分样品对光合藻有明显刺激生长的作用。污水库沿线和安新县排污渠水样对浮游动物有毒性作用。府河沿线的水样仅对鱼肝细胞有毒性作用，对发光菌无明显抑制。这些潜在的生物毒性效应是否会影响白洋淀淀区的水生生态系统，需进一步深入研究。

Water samples were collected from Baiyangdian catchment from 1992 to 1994 and their toxicity was assessed by a battery of bioassay. including photobacterium phosphoreum,Scenedesmus obliqnus, Daphinia magna acute and chronic toxicity bioassay, and Tilapia mossambica hapetocyte bioassay. The results showed that biological effects could be observed in this area. In most of the samples, nutritional effect could be observed in alga assay,which should be caused by pollution of nitrogen and phosphorus from Baoding city.Both acute and chronic toxicities could be observed at some sampling points in zooplankton assay.Along Fuhe river, toxic effects could only be detected by fish hapetocyte toxicity bioassay. No obvious effect could be found in photobacterium assay.