1674-5566201602-0207-102015-04-162015-06-042012ZX07101-007S30701ZF12061990—。E-mail18817775085@163.comE-mailljchen@shou.edu.cn11211.2013062.2131612013720146、3。、、。511422。Brachionusangularis、Polyarthratrigla、Keratellavalga、PolyarthradolichopteraFilinialongiseta。CCAT、CODMn、DO、TNTP。P<0.05、P<0.01。428±96ind/L<939±220ind/L<1216±330ind/L0.364±0.100mg/L<0.991±0.316mg/L<1.589±0.328mg/L。。X171A、1-2。3、45-7、、。8、910、。、。、。11.13、。0.57km13.50km。1.1.10.50km2、、、1.2m。253cm0.71mm。1267~1667/hm245~83g867~1267/hm2167~250g。1.1.220137201461。12。9S1-S93S1、S2、S3、S4、S5、S6S7、S8、S91。1。1Fig.1DistributionofsamplingsitesinLakeGehu1Tab.1CoordinatesofsamplingsitesinLakeGehusiteNES131°33'32.5″119°47'39.2″S231°33'26.1″119°47'49.7″S331°33'19.4″119°47'59.9″S431°33'12.9″119°47'40.1″S531°33'10.2″119°47'52.1″S631°33'19.7″119°47'29.6″S731°40'0.7″119°51'13.4″S831°40'55.7″119°50'3.7″S931°40'16.8″119°48'52.8″1.211《》2m5L0.5m10L。1L15mL。24h50mL4%。12。DSD。T、DOpHYSI600QS。1LaChl.a13。14、KOSTE15-16。11。1.31.3.1Shannon-WienerH'17H'=-∑Ni/NlnNi/N1NiiN。Pielou1975JJ=H'/lnS2H'Shannon-WienerS。Margalef1968DD=S-1/lnN3NS。YY=Ni/N×fi4NiiNfii。Y>0.0218-19。Jaccard1901Sj=c/a+b-c5abcSj0.00~0.25Sj0.25~0.50Sj0.50~0.75Sj0.75~1.0020。1.3.2SPSS19.0one-wayANOVAPearson。Canoco4.5canonicalcorrespondenceanalysisCCA。802222.12。T、DOaChl.aP=0.0150.0190.013<0.05ORPTNP=0.0120.029<0.05T、DNO3-NP=0.00100.001<0.01Chl.a、ORPCODMnP=00.0010.007<0.01DO、Chl.aCODMnP=0.00500.008<0.01pHP=0.034<0.05SD、DNO3-NP=000.001<0.01TP=0.034<0.05。23Tab.2Theannualaveragephysicochemicalindexesof3regionsinLakeGehuphysicochemicalindexinsideoutsidedredgingareapH7.98±0.178.23±0.047.87±0.22T/℃19.22±0.1119.67±0.1320.04±0.23DO/mg/L9.31±0.089.82±0.319.13±0.10SD/m0.25±0.010.27±0.010.34±0.01D/m1.50±0.061.53±0.022.40±0.19ORPmv174.4±6.76151.73±9.26138.10±7.33TN/mg/L2.40±0.092.25±0.042.34±0.05TP/mg/L0.34±0.120.30±0.050.19±0.04NO3-N/mg/L0.70±0.020.68±0.050.89±0.05NH4-N/mg/L0.50±0.030.43±0.010.53±0.13CODMn/mg/L5.46±0.545.43±0.434.16±0.11aChl.a/μg/L39.5±3.147.5±0.822.4±3.82.238443930。1033.3%3。3>>>。Brachionusangularis、Polyarthratrigla、KeratellavalgaP.dolichoptera0.11、0.10、0.08、0.08。、、、Filinialongiseta0.12、0.11、0.10、0.07、0.07。、、0.16、0.11、0.10、0.08。3Jaccard0.750.710.66。、29、3532-β24.1%、28.6%28.1%。324.1%β-325.0%。9022533CCATab.3Thepollutionindicatorsin3regionsofLakeGehuandthecodesofspeciesinCCAcodespeciesinsideoutsidedredgingareapollutionindicatinglevelSynchaetidae1Polyarthradolichoptera+++2P.trigla+++β-α3P.euryptera+++οSynchaetapectinata+++ο4Ploesomahudsoni+ο-βTrichocercidae5Trichocercapusilla+++β6T.elongata+++ο7T.capucina+++οTrichocercidae8Diurellasulcata++9D.tenuior+++10D.stylata++β-αBrachionidaeAnuraeopsisfissa+ο-β11Keratellavalga+++ο-β12K.quadrata+++ο-β13K.cochlearis+++ο-β14K.ticinensis+++Notholcalabis+βArgonotholcafoliacea+15Brachionusdiversicornis+++ο16B.calyciflorus+++β-αB.forficula++βB.falcatus+β17B.angularis+++β-α18B.caudatus+++B.bennini++B.budapestiensis+β19B.plicatilis+++β20B.urceus+++β-αB.quadridentatus+β-αEuchlanidaeEuchlanisparva++E.dilatata+++α-βE.triquetra+EpiphanidaeEpiphanesclavulatus+ο-βHexarthridae21Hexarthramira+++βTestudinellidaePompholyxsulcata++βFiliniidae22Filinialongiseta+++α23F.passa+++β-αF.cornuta+++οF.major++β24F.minuta+Philodinidae25Philodinaerythrophthalma++βP.megalotrocha+0122·3·codespeciesinsideoutsidedredgingareapollutionindicatinglevelRotarianeptunia+++αLecanidaeMonostylabulla+++ο-βM.dosterocerca++βLecaneungulata+++ο-βAsplanchnidae26Asplanchnapriodonta+++ο-β27A.girodi+++ο-βA.brightwelli++ο-βGastropodidae28Chromogasterovalis+++Conochilidae29Conochilusunicornis+++ο2.32428±96ind/L<939±220ind/L<1216±330ind/L。3F=8.619P=0.017<0.05P=0.038<0.05P=0.040<0.05P=0.006<0.01。23Fig.2Annualvariationofdensityofrotifersin3regionsofLakeGehu30.364±0.100mg/L<0.991±0.316mg/L<1.589±0.328mg/L。3F=15.483P=0.004<0.01P=0.029<0.05P=0.035<0.05P=0.001<0.01。33Fig.3Annualvariationofbiomassofrotifersin3regionsofLakeGehu2.434。Shannon-WienerH'1.65±0.151.64±0.101.53±0.46。PielouJF=16.177P=0.004<0.01P=0.018<0.05P=0.018<0.05。MargalefDF=6.132P=0.035<0.05P=0.025<0.05P=0.021<0.05。2.5>0.002>0.1529。DetrendedcorrespondenceanalysisDCA44.132>4CCACanonicalcorrespondenceanalysis。1122543Tab.4Monthaverageofdiversityindexesofrotifersin3regionsofLakeGehutimeinsideoutsidedredgingarea201307H'1.11±0.161.03±0.151.80±0.19J0.87±0.160.48±0.060.90±0.06D0.32±0.040.80±0.060.72±0.08201308H'1.62±0.221.85±0.101.57±0.23J0.80±0.050.78±0.030.84±0.14D1.00±0.631.02±0.090.71±0.26201309H'1.82±0.322.01±0.191.03±0.35J0.89±0.050.88±0.080.97±0.05D0.80±0.211.06±0.280.29±0.14201310H'1.61±0.242.20±0.101.69±0.08J0.97±0.010.83±0.040.85±0.13D0.59±0.141.38±0.030.76±0.21201311H'1.46±0.071.02±0.091.99±0.26J0.91±0.050.76±0.140.85±0.04D0.53±0.010.43±0.091.07±0.36201401H'1.82±0.182.28±0.161.92±0.16J0.94±0.030.92±0.160.83±0.03D0.73±0.121.26±0.161.01±0.15201402H'1.85±0.301.98±0.361.67±0.33J0.96±0.040.93±0.050.75±0.15D0.75±0.260.88±0.240.88±0.14201403H'1.70±0.301.48±0.391.83±0.10J0.86±0.060.76±0.090.80±0.02D0.71±0.160.69±0.240.83±0.10201404H'1.22±0.161.62±0.061.58±0.08J0.95±0.010.90±0.030.80±0.07D0.70±0.0