不同磷浓度下光强-温度对水华鱼腥藻-Ana-省略-aenaflos-aquae-
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2020-03-10 11:22:45
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J.LakeSci.(湖泊科学),2015,27(3):459-465http://www.jlakes.org.E-mail:jlakes@niglas.ac.cn2015byJournalofLakeSciences不同磷浓度下光强、温度对水华鱼腥藻(Anabaenaflos-aquae)生长的动力学*张萍1,2,3,李哲2,3**,王胜1,郭劲松2,3,肖艳2,3,刘静1,2,3(1:重庆大学城市建设与环境工程学院,重庆400045)(2:中国科学院重庆绿色智能技术研究院,重庆400714)(3:中国科学院水库水环境重点实验室,重庆400714)摘要:水华鱼腥藻是常见的有害水华藻种,但其在磷、光强、温度等生境要素协同作用下的生长动力学鲜见报道.本研究在Lehman模型、Steele模型基础上,设置8个PO3-4-P梯度:0、0.1、0.2、0.5、0.75、1.0、2.5、5.0μmol/L,4个温度水平:15、20、25和30℃和4个光强水平:1000、2000、3000和5000lx,采取单因素实验方法进行水华鱼腥藻室内纯培养.Monod模型表明水华鱼腥藻最适生长温度和光强条件分别是20℃和3000lx,最大比生长速率(μmax)和半饱和常数(KS)分别为0.447d-1和0.081μmolP/L;分别用Lehman模型和Steele模型模拟水华鱼腥藻μmax在不同磷浓度下对连续变化的温度和光强的响应,Lehman动力学模拟结果表明水华鱼腥藻的最适生长温度为21.22±0.98℃,μmax和KS分别为0.421±0.011d-1和0.055±0.009μmolP/L;Steele模型结果表明μmax和KS分别为0.461±0.010d-1和0.051±0.009μmolP/L,水华鱼腥藻最适生长光强Ik为2650.93±88.19lx.关键词:水华鱼腥藻;动力学模型;光强;温度;磷ModelingofAnabaenaflos-aquaegrowthkineticsoflightintensityandtemperaturewithindifferentlevelsofphosphorusconcentrationsZHANGPing1,2,3,LIZhe2,3,WANGSheng1,GUOJinsong2,3,XIAOYan2,3&LIUJing1,2,3(1:FacultyofUrbanConstructionandEnvironmentalEngineering,ChongqingUniversity,Chongqing400045,P.R.China)(2:ChongqingInstituteofGreenandIntelligentTechnology,ChineseAcademyofSciences,Chongqing400714,P.R.China)(3:KeyLabofReservoirWaterEnvironment,ChineseAcademyofSciences,Chongqing400714,P.R.China)Abstract:Anabaenaflos-aquaeisoneofthecommonharmfulcyanobacteriaspecies.However,itsgrowthkineticsco-impactedbyphosphateconcentration,lightintensityandtemperaturehaverarelybeenreported.Inthispaper,eightPO3-4-Pconcentrationgra-dients(0,0.1,0.2,0.5,0.75,1.0,2.5and5.0μmol/L),fourwatertemperatures(15,20,25and30℃)andfourlightintensities(1000,2000,3000and5000lx)wereselectedtocarryoutsinglefactorbatchexperiments.Amaximumspecificgrowthrate(μmax)wasusedtoindicatealgaespecificgrowthrateunderoptimalgrowthcondition.Half-saturationconstant(KS)couldbeappliedtodescribeaffinityofalgaetonutrients.RegressionresultsfromMonodmodelshowedthatAnabaenaflos-aquaereachedμmaxat20℃and3000lx.TheμmaxandKSwere0.447d-1and0.081μm
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