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J.LakeSci.(湖泊科学),2014,26(5):691-697.jlakes.org.E-mail:jlakes@niglas.ac.cn2014byJournalofLakeSciencesδ13Cδ15N*梁越1,肖化云1,2**,刘小真1**,李文华1,熊戬113300472550002、、、、、.δ15N-NH+4-1.8‰±1.0‰δ15N-NO-3-0.5‰±1.7‰δ15N-NH+46.8‰±8.6‰δ15N-NH+413.5‰25.4‰δ15N-NO-3-2.9‰±4.2‰.、δ15N6.6‰±0.3‰、7.1‰±0.7‰δ13C-27.5‰±0.3‰δ13C3‰.C/N9.4±0.5C/N6.δ15N、δ13CC/Nδ15N3.6‰~8.3‰5.9‰±1.6‰δ13C-27.1‰~-24.7‰-26.0‰±1.0‰C/N2.6~10.86.2±2.7.2δ15Nδ15N.δ13Cδ15NIdentifyingprovenanceofinorganicnitrogenandorganicmatterindifferentecotypelakesusingδ13Candδ15NLIANGYue1XIAOHuayun12LIUXiaozhen1LIWenhua1&XIONGJian11KeyLaboratoryofPoyangLakeEnvironmentalandResourceUtilizationMinistryofEducationNanchangUniversityNanchang330047P.R.China2StateKeyLaboratoryofEnvironmentalGeochemistryInstituteofGeochemistryChineseAcademyofSciencesGuiyang550002P.R.ChinaAbstractInordertoinvestigatenitrogenprovenanceindifferentecotypelakesnaturalorurbansamplesofwatersurfacesedi-mentshydrophytesandzoobenthosinlakeswerecollectedandtheirisotopiccompositionsofcarbonandnitrogenweremeasured.Theresultsindicatedthatδ15N-NH+4andδ15N-NO-3inthewaterofLakeBanghuwere-1.8‰±1.0‰and-0.5‰±1.7‰respectivelywhichshowedthemajorinorganicnitrogenfromrainwaterandfarmingfertilizer.Theδ15N-NH+4inLakeXianghuwa-terwashigh6.8‰±8.6‰especiallyinfishwastewater13.5‰andsewageoutlet25.4‰whichshowedsewagein-put.Theδ15N-NO-3waspartiallynegative-2.9‰±4.2‰andshowedthatthenitratenitrogenwasnotmainlyfromanthropo-genicinput.Theδ15Noforganicmatterswasnotsignificantlydifferentfromthatofsurfacesedimentsandhydrophyte6.6‰±0.3‰and7.1‰±0.7‰respectivelyinLakeBanghusohydrophytewasthemajorsourceoforganicmatterforsediments.InLakeXianghutherewerewidedistributionsofδ15Nδ13CandorganicC/Ninintheorganicmattersofsedimentsδ15N3.6‰-8.3‰δ13C-27.1‰--24.7‰organicC/N2.6-10.8respectivelywhichimpliesthecomplexityofthesourcesofor-ganicmatterprovenanceintheurbanlakes.Keywordsδ13Cδ15NlakeinorganicnitrogenorganicmatterprovenanceLakeBanghuLakeXianghu***41263002、20123BBG70192GJJ13074.2013-11-122014-01-06.1974~E-maillyue987465@sina.com.E-mailxiaohuayun@vip.skleg.cnliuxiaozhen@ncu.edu.cn.692J.LakeSci.(湖泊科学),2014,26(5)N、P154%、53%、48%、41%、28%2.、、.《》GB/T38381988Ⅴ3.δ15N、、4-5.、δ13C、δ15NC/N、、6.——————2、、、、、2.11.1———80km2.、0.5~1.0m.2.4km24m、、.201110、Hyriopsiscumingii.1e1e7.1Fig.1SchematicofstudyareaandsamplingsitesinLakeBanghuandLakeXianghuGPS5L0.5m.10cm、5cm0~5cm31.4h4℃梁越等:δ13C和δ15N指示不同生态类型湖泊无机氮及有机质来源693.1.2TN、TP、NH+4-N、NO-3-N、HCO-3CODCr、、、、《》7.100.TOC2g5%HCl1h24h3000/min25min.TOC、TN、C/NTN、C/NVario-MacroGerman.NO-3-N、NH+4-N0.5m1.25L0.7μmMillpore450℃2h0~4℃NO-3、NH+4Dowex1-x8、Dowex50w-x82mol/LKCl10~15dNO-38CF-IRMSEuro3000Isoprineδ15NIAEA±0.3‰.、δ15N850℃2h2~3gCuO、1~2gCu850℃5hFinniganMAT252N2δ15NN2IAEA±0.2‰.TOC、δ13C850℃2h2~3gCuO850℃5hCO2FinniganMAT252δ13CPeeDeePDB±0.2‰.δ15Nδ13C=1000R/R-1R15N/14N13C/12C.SPSS19.0Sigmaplot10.0.22.1pH7.37~8.297.64±0.391.pH5.80~6.506.14±0.23.1990s、、9-10.CODCrCODCre1e7CODCr54.998155.040mg/L.HCO-3CO2、HCO-3.HCO-348.35~70.00mg/L64.00±14.59mg/Lb7HCO-390.25mg/LHCO-3112.89±54.12mg/Le1、e7HCO-3179.20、209.50mg/L.694J.LakeSci.(湖泊科学),2014,26(5)pHHCO-3/mg/LCODCr/mg/LNH+4-N/mg/LNO-3-N/mg/LTN/mg/LTP/mg/L7.664.0015.630.330.101.770.100.414.594.590.040.061.130.038.390.2522.200.370.223.510.147.348.358.810.270.061.040.066.1112.8943.674.340.7511.320.620.254.1246.921.990.374.540.986.5209.50155.049.121.2420.693.055.864.4613.062.940.377.110.19NH+4-N、NO-3-N、.NH+4-NNH+4-N0.33±0.04mg/LNH+4-N2.94~9.12mg/L14.34±1.99mg/LNH+4-N10e14.29mg/Le79.12mg/L.NH+4-NNH+4-N.NO-3-N、、、NH+4-N.NO-3-N0.06~0.22mg/L0.10±0.06mg/Lb7NO-3-N0.22mg/L.NO-3-N0.37~1.24mg/L0.75±0.37mg/Le1、e7NO-3-N0.47、0.37mg/LNH+4-N2、、NH+4NO-3NO-3.Quirós11400NH+4-N、NO-3-NNH+4-NNO-3-N.2.22.2.1、δ15N0‰δ15N2‰~8‰δ15N8‰~20‰δ15N-NH+4-30‰~0‰δ15N-NO-3-10‰~2‰15N/14N12-13.NH+4-N、NO-3-Nδ15N-NH+4tPNH+4-N=0.001、PNO-3-N=0.001、Pδ15N-NH+4=0.026δ15N-NO-3Pδ15N-NO-3=0.2042.NH+4-Nδ15N-NH+4δ15N-NH+4-3.5‰~0.6‰-1.8‰±1.0‰NO-3-Nδ15N-NO-3δ15N-NO-3-0.5‰±1.7‰δ15N.NH+4-Nδ15N-NH+40.4‰~25.4‰6.8‰±8.6‰e1e7δ15N-NH+413.5‰25.4‰14-15e1e7.NO-3-NNH+4-NNO-3-Nδ15N-NO-3-9.2‰~1.3‰-2.9‰±4.2‰2-8.2‰-9.2‰.NH+4-NNO-3-NNO-3.2.2.2、δ13C、δ15NC/Nδ13C、δ15NC/N16-17δ13C、δ15Nδ13C-28‰~-25‰δ15N0.2‰~4‰δ13C、δ15Nδ13C-23‰~-18‰δ15N4‰~10‰δ13C、δ15Nδ13C-27‰~-25‰δ15N1.4‰~3.3‰δ13C、δ15N.C3、C4C/NC/N7C/N20~301Tab.1PhysicalandchemicalparametersofwaterbodyinLakeBanghuandLakeXianghu梁越等:δ13C和δ15N指示不同生态类型湖泊无机氮及有机质来源6952NH+4-N、NO-3-Nδ15NFig.2ContentsofNH+4-NNO-3-Nanditsδ15NinwaterbodyofLakeBanghuandLakeXianghuC/N18-19..δ15NTN6.6‰±0.3‰δ13CTOC-25.1‰~-23.8‰-24.4‰±0.4‰C/N2.7~3.32.9±0.23.δ15N7.1‰±0.7‰0.5‰3、、δ13C、δ15NC/NFig.3δ13Cδ15NandorganicC/NofsurfacesedimenthydrophyteandcalmintheLakeBanghuandLakeXianghuδ15Nδ15N.δ13C-27.5‰±0.3‰δ13C3‰.C/N9.4±0.5C/N6CCO2N6N696J.LakeSci.(湖泊科学),2014,26(5)C/N...δ15N、δ13CC/Nδ15N、δ13CC/N3.δ15N3.6‰~8.3‰5.9‰±1.6‰δ13C-27.1‰~-24.7‰-26.0‰±1.0‰C/N2.6~10.86.2±2.7.e1、e7δ15N、δ13C、C/Nδ15N7.3‰、8.3‰δ13C-27.1‰、-24.7‰C/N>816.δ15N5‰C/N6~919δ15N、δ13CC/N3.δ15N、δ13CC/N.20.δ15N9.4‰~10.9‰9.9‰±0.8‰δ15N3.3‰~5.2‰4.0‰±1.0‰3.δ15Nδ15N、、δ15N、N21-22.32NN.δ15Nδ13C、δ15NC/N.41KlingHJMugiddeRHeckyRE.R
本文标题:13C和15N指示不同生态类型湖泊无机氮及有机质来源
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