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1、太湖微囊藻毒素时空分布特征及与环境因子的关系LakeSci.(湖泊科学),2011,23(4):513—519http:#www.jlakes.org.E—mail:jlakes@nighs.ac.cn@2011byJournalofLakeSciences太湖微囊藻毒素时空分布特征及与环境因子的关系王经结,杨佳,鲜殷呜,钱新,李正魁,耿金菊,孙成(南京大学环境学院污染控制与资源化研究国家重点实验室,南京210093)摘要:采用高效液相色谱法(HPLC)对太湖水体中溶解态微囊藻毒素(MC—LR;MC—RR)浓度进行检测,探讨微囊藻毒素浓度的时空变化
2、及其与氮,磷,总有机碳,蓝藻生物量以及温度等湖泊环境因子之间的关系.结果表明:微囊藻毒素表底层浓度基本一致;在一天之内的变化没有明显规律;冬季微囊藻毒素浓度较高;位于竺山湾和西部沿岸地区的两个点(N5和N1)的微囊藻毒素浓度在一年之中变动较大;MC.LR浓度一般大于MC—RR,但在8,9两月出现相反的结果.水中溶解性微囊藻毒素与各环境因子的相关性分析表明微囊藻毒素与总氮呈极显着正相关,与总磷无显着相关性.在蓝藻暴发期,MC—LR与总氮,总磷,ss,总有机碳,蓝藻生物量呈极显着正相关;MC—RR与所测的环境因子皆无显着相关性.关键词:微囊藻毒素;太湖
3、;环境因子;相关性CharacteristicofmicrocystindistributionsanditsrelationshipswithenvironmentalfactorsinLakeTaihuWANGJingjie,YANGJia,XIANQiming,QIANXin,LIZhengkui,GENGJinju&SUNCheng(StateKeyLaboratoryofPollutionControlandResourceReuse,SchooloftheEnvironment,NanjingUniversity,Nanjing
4、210093,P.R.China)Abstract:Inthispaper,thehighperformanceliquidchromatography(HPLC)wasusedtomonitorthespatialandtemporaldistil—butionofdissolvedMicroeystin—LRandMierocystin—RRinLakeTaihu,anditsrelationshipwithphysioehemiealfactorsofthelakewerealsodiscussed,Theresultsshowedthatt
5、heconcentrationsofmierocystin(MCs)werenotdifferentbetween8urfaeeandbottomwaterinaday,andthehiIghestconcentrationofmicrocystinsoccurredinwinter.ConcentrationsoftheMCschangedmuchduringoueyearinthesamplingsitesN5andN1whichlocatedinZhushanBayandthewesternpartofLakeTaihu,respective
6、ly.General—ly,theconcentrationoftheMC-LRwashigherthanMC—RRfortheyearinaveragewhiletheoppositeresultsappearedinindividualmonthofAugustandSeptember.CorrelationanalysisshowedthatMC—LRwassignificantlypositivecorrelatedwithTN,butdidnotshowcorrelationwithTP.Duringtheperiodofwaterblo
7、omofeyanobacteria,levelsoftheMC—LRweresignificantlypositiveCOITe—latedwithTP,TN,UV254,SS,totalorganiccarbonandbiomassofeyanobaeteria,whereasMC—RRwasnotsignificantcorrelatedwj}halltheenvironmentalfaetorsinthestatisticaltest.Keywords:Mierocystin;LakeTaihu;environmentalfactors;co
8、rrelation近年来,随着经济的迅猛发展,水体富营养化程度加剧,有害蓝藻水华发生日趋频繁,这引起国内外研究人员的普遍关
