太湖沉积物碳氮同位素组成特征与环境意义

20055Vol.25,No.2252MARINEGEOLOGY&QUATERNARYGEOLOGYMay,20051,1,2,1,2,1(1,210008;2,100039):13C15N,13C15N--,13C15N,TPTN,13C15N5013C15N,205090:;;:P597.2:A:025621492(2005)022002520613C,;15N,,,,[15],,[6],,,,,1(30563134N1195412036E)(1),2425km2,2112m,5114108m3,36500km2[5],,,;:(KZCX12SW212);(40273004):(1965),,,,,E2mail:[e-mail]:2004208220;:2005203208.,,[6],,,,,80%,,20%,[7]2200167,GPS,(1),22cm,,(4000rpm,20min),(TN)(TP);,TNTP13C15N,5%,24h,,150,2mg,,80015min,CO2;CO2,MAT2251CO213C,0105,PDB[8],Kjeldahl,NaOH,,,,,©1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.20051Fig.1SamplinglocationofLakeTaihuN2,MAT2251N215N,0105TNTP[9]33.12,24cm13C-2415-1913,13C,-2110-1913,-2415-221124cm13C,2,313C(R=019)2412cm,13C,(R=017)12cm,13C,2cm2cm,,13C,2,24cm15N4151512,,4151512,4159.215N13C,(R=015)2412cm,15N,12cm,15N,64cm,15N,;15N2cm,,3()1015(),2Fig.2Theverticaldistributionof13Cand15NvaluesfromsedimentofmajorlakeareasofLakeTaihu62'1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.2,:3.23.2.1TPTN,22cm810cmTPTN(R=0188),(R=015)(3)1618cm,TPTN;13C15NTPTN164cm,TPTN13C15N,(104cm)TPTN13C15N02cm,13C15N,TPTN3Fig.3Therelationshipamong13C,15NandTNandTPconcentrationsofsedimentinDapuLakearea3.2.2TPTN,TP46cm(4)TPTN(R=0196)108cm,TPTN,13C15NTPTN102cm,TN;TP,6cm,,2cm;13C15N,2cm02cm,13C15N,TPTN,TPTN4Fig.4Therelationshipamong13C,15NandTNandTPofsedimentinXiaomeikouLakearea3.2.3TPTN13C15N(R=015),(R=017),TPTN,(5)13C15NTPTN,108cm10cm,13C15NTPTN,;8cm,TPTN,2cm,TPTN8cm,13C15N,5Fig.5Therelationshipamong13C,15NandthecontentofTNandTPconcentrationsofsedimentinEastTaihuLakearea3.2.413C15NTPTN,108cm(6)10cm,16cmTP,13C15NTPTN72'1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.2005,;8cm,TPTN4cm,8cm,15N,4cm,13C10cm,TPTN,6Fig.6Therelationshipamong13C,15NandTNandTPconcentrationsofsedimentinMeiliangLakearea3.3[1012],,,[13],,[14]137Cs210Pb,810cm1950,23cm199013C15N,810cm13C15N,TPTNTPTN,,10cm,13C15N;,13C15NTPTN,TPTN,,13C15N8cm2cm,,13C15N,15N,,TPTNTPTN,,TPTN,23cm,TPTN,TPTN13C15N,13C15N,13C15N,13C15N,,13C15N,,13C15N,13C15N2050(108cm)901950,,,,,,90,,,13C15N,,-,13C15N4,13C,15NTPTN,15N,45013C15N,13C15N,20506082'1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.2,:,80,,90[15],,4,,;,13C15N,1950,,,,,,,2090,13C15N,13C15N13C15NTPTN,13C15NTPTN,15N,13CTPTN13C15N,TPTN,13C15NTPTN4,TPTN,,,TPTN(),,13C15N,,(References)[1]BrennerM,WhitmoreTJ,LasiMA,etal.Stableisotope(13Cand15N)signaturesofsedimentedorganicmatterasin2dicatorsofhistoricallaketrophicstate[J].J.Paleolim.,1999,22:205221.[2]TeranesLJ,BernasconiMS.Therecordofnitrateutilizationandproductivitylimitationprovidedby15Nvaluesinlakeor2ganicmatterAstudyofsedimenttrapandcoresedimentsfromBaldeggersee,Switzerland[J].Limnol.Oceanogr.,2000,45(4):801813.[3]SchelskeLC,HodellAD.Usingcarbonisotopesofbulksedi2mentaryorganicmattertoreconstructthehistoryofnutrientloadingandeutrophicationinLakeErie[J].Limnol.Ocean2ogr.,1995,40(5):918929.[4],.[J].,2003,23(5):557564.[WUJing2lu,WANGSu2min.Stableisotopictracingofhistoricalprogres2siveeutrophicationfromLakeChenghai,Yunnan,China[J].Quatern.Sci.,2003,23(5):557564.][5],,,.[J].,2000,20(2):309314.[WUYing,ZHANGJing,CAOJian2ping,etal.ThecharacterofcarbonisotopegeochemistryoftheChangjiangdrainagebasin[J].JournalofOceanUniversityofQingdao,2000,20(2):309314.][6],.[M].:,1998.56.[WANGSu2min,DOUHong2shen.MemoirsofLakesinChina[M].Beijing:SciencePress,1998.56.][7],.[M].:,1993.12.[SUNShun2cai,HUANGYi2ping.LakeTaihu[M].Beijing:ChinaOceanPress,1993.12.][8].[M].:,2000.558562.[LURu2kun.MethodsofSoilScienceandAgriculturalChemistryAnalysis[M].Beijing:ChinaAg2riculturalScienceandTechnologyPress,2000.558562.][9],.()[M].:,1990.[JINXiang2can,TUQing2ying.CriteriaofEvaluatingLakeEutrophication(2ndedition)[M].Beijing:ChinaEnvironmentalSciencePress,1990.][10]BernasconiMS,BarbieriA,SimonaM.CarbonandnitrogenisotopevariationsinsedimentingorganicmatterinLakeLua2gano[J].Limnol.Oceanogr.,1997,42(8):17551765.[11]MeyersAP.Organicgeochemicalproxiesofpaleoceanograph2ic,paleolimnologicandpaleoclimaticprocesses[J].Org.Geo2chem.,1997,27(5/6):213250.[12]HerczegLA,SmithKA,DightonCJ.A120yearrecordofchangesinnitrogenandcarboncyclinginLakeAlexandrina,SouthAustralia:C:N,13Cand15Ninsediments[J].Ap2pliedGeochemistry,2001,16:7384.[13],,,.[J].,2001,13(3):193203.[PUPei2min,WANGGuo2xiang,LIZheng2kui,etal.Degradationofhealthyaqua2ecosystemanditsremediation:theory,technologyandapplication[J].JournalofLakeSci2ences,2001,13(3):193203.][14],,,.[J].,2005,17(2):125135.[ZHUGuang2wei,QINBo2qiang,GAOGuang,etal.Accumulationcharacter2isticsofheavymetalsinthesedimentsofLakeTaihu,China[J].JournalofLakeSciences,2005,17(2):125135.][15],.[J].92'1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.2005,2001(2):815.[ZHANGYun2lin,QINBo2qiang.StudyontheevolvementofwaterenvironmentinTaihuLake[J].TransactionsofOceanologyandLimnology,2001(2):815.]ENVIRONMENTALSIGNIFICANCEANDSTABLEISOTOPESIGNATURESFROMSEDIMENTEDORGANICMATTERINLAKETAIHUWUJing2lu1,LINLin1,2,LIUJian2jun1,2,GAOGuang1(1NanjingInstituteofGeographyandLimnology,Chinese