Research on Survival Conditions of Bellamya sp.in Different Aquatic Vegetation Habitats in Taihu Area  

太湖地区不同水生植被生境下环棱螺的生存状况研究(英文)

作　　者：何连帅[1] 谢斐[2] 张卉[2] 沈忱[1] 王磊[2] 刘茂松[1] 

机构地区：[1]南京大学生命科学学院,江苏南京210093 [2]江苏省林业科学研究院,江苏南京211153

出　　处：《Agricultural Science & Technology》2012年第3期497-501,共5页农业科学与技术（英文版）

基　　金：Supported by Special Project for Scientific Research of Forestry Commonweal Industry of National Forestry Bureau(200904001)~~

摘　　要：[Objective] The paper was to investigate the survival conditions of Bel- lamya sp. in different aquatic vegetation habitats in Taihu area, so as to provide suitable evaluation indexes for environmental monitoring in the area. [Method] Equal density of Bellamya sp. was placed in 3 aquatic vegetation habitats （emerged plant area, submerged plant area and non-plant area） in ecological engineering construc- tion area near the west of Wangyuhe in Taihu, the survival rate, SOD activity, MDA content and P450 enzyme activity of Bellamya sp. during outbreak and non-outbreak stage of cyanobacteria were determined, and the correlation between these indexes and ammonia nitrogen content of lake water was also analyzed. [Result] During the outbreak stage of cyanobacteria, the survival rates of Bellamya sp. in emerged plant area, submerged plant area and non-plant area were 0%, 55.2% and 89.3%, re- spectively, SOD activity first decreased and then increased, the change trend of MDA content was opposite with SOD change trend, P450 enzyme activity continu- ously decreased. During non-outbreak stage of cyanobacteria, the survival rates of Bellamya sp. in 3 habitats were 90.6% ,98.8 and 99.5%, respectively, SOD activity first decreased and then increased, MDA content first increased and then decreased, the changes of P450 enzyme activity were not regular. SOD activity of Bellamya sp. during 2 phases had significantly negative correlation with ammonia nitrogen content of lake water, MDA content had significantly positive correlation with ammonia nitro- gen content of lake water only during non-outbreak stage of cyanobacteria, P450 enzyme activity has no significant correlation with ammonia nitrogen content. This in- dicated that when Bellamya sp. was used to evaluate the impact of aquatic vegeta- tion on benthic animals, P450 enzyme activity was not the suitable indicator. [Conclusion] SOD activity in muscle tissue of Bellamya sp. could be used as the indica- tor for evaluation of habitat, MDA could be used as indicator for dete[目的]研究太湖地区不同水生植被生境下环棱螺的生存状况,为该地区环境监测提供合适的评价指标。[方法]在太湖虞望河西附近生态建设工程区的挺水植物区、沉水植物区和无植物裸底区3种水生植被生境中放养等密度的环棱螺,测定环棱螺在蓝藻爆发阶段和非蓝藻爆发阶段的存活率、超氧化物歧化酶活性、丙二醛含量和P450酶浓度,并分析所测指标与湖水氨氮含量的相关性。[结果]在蓝藻爆发阶段,挺水植物区、沉水植物区和无植物裸底区环棱螺的存活率分别为0%、55.2%和89.3%,SOD活性表现为先降后升,MDA与SOD变化趋势相反,P450酶则不断下降;在非蓝藻爆发阶段,3种生境环棱螺的存活率分别为90.6%、98.8和99.5%,SOD活性先降后升,MDA则为先升后降,P450酶的变化没有规律。2个阶段中环棱螺SOD活性与湖水氨氮含量均显著负相关,MDA只在非蓝藻爆发期与氨氮含量显著正相关,P450酶与氨氮含量无显著相关关系,这表明用环棱螺评价水生植被对底栖动物的影响时,P450酶活性并不是合适的指标。[结论]该研究结果表明太湖地区的环棱螺体内SOD活性可以作为评价生境的指标,MDA可作为非蓝藻爆发阶段检测氨氮含量的指示物,但P450酶不能作为该地区3种生境环境污染早期诊断与预警的指标。

关 键 词：Taihu Bellamya sp. SOD MDA P450 enzyme Ammonia nitrogen 

分 类 号：X174[环境科学与工程—环境科学]