湖北金沙河水库浮游植物群落结构及其与水环境因子的关系

J．LakeSci．2015275902-910DOI10．18307/2015．05172015byJournalofLakeSciences*＊＊43007020132014．89421651．39%．Synedraacus0．195Phor-midiumtenus0．180Ｒaphidiopsissinensia0．171Cyclotellastellig-era0．220Dinobryoncylindricum0．234Achanthidumcatenatum0．910、、、．Shannon-WienerPielouMargalef．Pearson、．、、、、．CommunitystructuresofphytoplanktonandtheirrelationshipswithenvironmentalfactorsintheJinshaheＲeservoirHubeiProvinceZHANGYunMAXufaGUOFeifeiLIJianzhu＆XIONGBangxiCollegeofFisheriesHuazhongAgriculturalUniversityWuhan430070P．Ｒ．ChinaAbstractInordertoevaluatethewaterqualityofdrinkingwaterresourceinthemiddlereachesoftheChangjiangＲiverphyto-planktoncommunitystructuresandtheirdiversitieswereinvestigatedseasonallyfromAugust2013toApril2014intheJinshaheＲeservoirHubeiProvince．Meanwhilemultivariatestatisticswasusedtoanalyzetherelationshipsbetweenphytoplanktonassem-blagesandenvironmentalvariables．Theresultsshowedthatthereweretotalof216speciesofphytoplanktonbelongingto8phylaand94genera．Chlorophytawhichmadeupof51．39%ofthetotalnumbersofthespecieswasthedominantgroupfollowedbyBacillariophytaandCyanophyta．Dominantspeciesvariedindifferentseasons．InsummertheecologicaldominanceofSynedraacuswasthehighest0．195andinautumnPhormidiumtenus0．180andＲaphidiopsissinensia0．171hadthehighestecologicaldominance．InwinterCyclotellastelligera0．220andDinobryoncylindricum0．234hadthehighestecologicaldominanceandAchanthidumcatenatumwastheabsolutedominantspecieswithitsecologicaldominanceof0．910．IngeneralCyanophytaBacillariophytaandChlorophytaweredominantgroupsinsummerandCyanophytaBacillariophytaChlorophytaandCryptophytaweredominantgroupsinautumn．BacillariophytaandChrysophytaweredominantgroupsinwinterandBacillariophy-tawastheabsolutedominantgroupinspring．BiodiversityindicesshowedthatphytoplanktonhadhighervaluesoftheShannon-WienerdiversityandthePieloudiversityinautumnbutthelowestvaluesinspringbecausetheabsolutedominantspeciesappearedinspringotherthaninautumn．InadditionthehighestvalueofMargalefdiversityoccurredinautumnbecauseofitslargernumber＊＊＊201303056．2014-08-042014-12-18．1989～[e-mail][e-mail]dtoanalyzetherelationshipsbetweenthedominantspeciesineachseasonandtheenvi-ronmentalfactorsfilteredbyPearsoncorrelationanalysis．Theresultsshowedthatphosphatetotalphosphorusandwatertempera-turewerethemainenvironmentalfactorsthathaveinfluencedphytoplanktonassemblages．Thereservoirhadworsewaterqualityinsummerandautumnthaninspringandwinterwhichimpactedonthevariationsofdominantgroupsofphytoplanktonindifferentseasonsandhadworsewaterqualityinspringandsummerthaninautumnandwinterwhichimpactedonthecellabundanceandbiodiversityindices．KeywordsJinshaheＲeserviorphytoplanktoncommunitystructuresenvironmentalfactorsredundancyanalyses1．2．3．、、、4．5．．、．6．、7．、、、pH．．8．、、、9-12．、．31°17'～31°23'N114°32'～114°35'E1．787×108m3108km212．53m．、、“”．Ⅱ、、、、13．、14-16．．11．181S1S6．S5、S7S2、、S4、S3S8、、．20138、201310、2014120144．20144S5、S6．904J．LakeSci．20152751．21Fig．1DistributionofsamplingsitesintheJinshaheＲeservoir《》1725#“∞”125ml4%18．5L1L15ml48h30ml．0．1ml10×40．250～1002±15%．109μm3=1mg．．19N=niAAc·VsV[]a1Ncells/LAmm2Acmm2Vs1LmlVamlni．DO、WTpHHACHHQ40d．TNNH+4-N420nmNO－3-N410nmNO－2-NN-1-TP0．45μmPO3－4-PCODMn0．45μmaChl．a20．1．31．3．1YY=niN·fi2niifiiN．Y≥0．0221．Shannon-WienerH'H'=－∑Si=1Pi·log2Pi3MargalefDD=S－1/log2N4PielouJJ=H'/log2S5SPii．1．3．2detrendedcorrespon-905denceanalysisDCA43CANOCO4．5redundancyanalysisＲDA22．11Pear-sonP＜0．057NH+4-N、NO－3-N、PO3－4-P、TN、TP、CODMnDOY≥0．02Monte-CarloP＜0．05．lgx+111．Origin8．0CANODＲAW4．5．22．11Tab．1NumberofphytoplanktonspeciesintheJinshaheＲeservoir23217155980505420262423721674424433313340101118159951112．1．189421611151．39%3516．20%3315．28%2310．65%、、5、4、412．31%、1．85%、1．85%0．46%．＞＞＞1．2．1．2．、Synedraacus0．195、Phormidiumtenus0．180Ｒaphidiopsissinensia0．171Cyclotellastelligera0．220Dinobryoncylindricum0．234Achanthidumcatenatum0．910．2．1．37．99×105～360．20×105cells/L111．32×105cells/L410．7906～7．5478mg/L4．2728mg/L81．827．58×105cells/L859．18%823．56%13．14%1014．01×105cells/L1045．91%19．80%、17．57%13．73%13．15×105cells/L139．40%27．70%26．64%4346．36×105cells/L496．16%．48475．21%86．98%10131．16%57．21%2．8S6101S5S74S73．2．1．4H'4．160．80D3．802．08J0．670．142．2．25．8～33．2℃pH7．20～8．69DO7．45～10．28mg/LNH+4-N906J．LakeSci．20152752Fig．2TheseasonalvariationsofabundanceandbiomassofdominatephytaintheJinshaheＲeservoir3Fig．3TheabundanceandbiomassofphytoplanktonatdifferentsamplingsitesintheJinshaheＲeservoir9072Tab．2DiversityofphytoplanktonintheJinshaheＲeservoirH'3．31±0．564．16±0．453．57±0．270．80±0．12D2．63±0．353．80±0．542．08±0．382．08±0．42J0．57±0．090．65±0．070．67±0．650．14±0．020．0173～0．6763mg/LNO－2-N0～0．0057mg/LNO－3-N0．0421～0．2968mg/LTN0．2167～0．9543mg/LPO3－4-P0．0003～0．0222mg/LTP0．0040～0．0350mg/LCODMn0．6231～2．0625mg/LChl．a0．0035～0．0197mg/L3．2．3ＲDA1288．8%PO3－4-PDOPO3－4-PP＜0．0110．94341PO3－4-P．DOOscillatoriaagardhiiPO3－4-PChlorococcumhumicola、Microcystisflos-aquae4．3Tab．3AverageofaquaticenvironmentalfactorsintheJinshaheＲeservoirNH+4-N/mg/L0．1743±0．04310．5039±0．11350．0660±0．04160．3384±0．1087NO－2-N/mg/L0．0