感潮河段沉積物細菌數(shù)量的垂向分布特性及其影響因素.pdf

1、中山大學碩士學位論文感潮河段沉積物細菌數(shù)量的垂向分布特性及其影響因素姓名：范獻方申請學位級別：碩士專業(yè)：環(huán)境科學指導教師：吳群河20090606DepthdistributionofbacterialabundanceinsedimentinGuangzhouReachofthePearlRiverMajorlWaterpollution&AquaticEnvironmentManagementName：FanXianfangSuper

2、visor：AssociateProfWuQunheAbstractInthepaper3core—samplesitesinGuangzhouReachofthePearlRiverwereselectedasresearchdistrictBacterialabundanceatdifferentdeeplevelsofsedimentWasexaminedbyDAPImethodDepthdistributionofbacteri

3、alabundanceanditsinflucingfactorswereanalyzedwiththesoftwareofSPSS160forwindowsConclusionsweresummarizedasfollows：(1)BacterialabundancechangedtardilywithdeptIl，andtheminimumof157108cells(gdryweight)’1at300milldeeplevelWa

4、sjust2timeslessthanthatatsurface，whichmeantawidelybiochemicalactiveregionabout0to300rnnlintidalriversedimentTheeffectofDAPIdistainedWasdistinct，withtheminimumof029，whichproveditWasnecessarytoprocessDAPIdistained(2)Nitrog

5、encontent，carboncontentanddissolvedoxygen(DO)inthesedimentweredominatingfactorsaffectinghorizontaldistributionofbacterialabundance，whileN03NcontentandNIhNcontentinthesedimentwererestrictingfactorsNitrogencontent，carbonco

6、ntentanddissolvedoxygen(DO)inthesedimentweredominatingfactorsaffectingveaicaldistributionofbacterialabundance，whileDOWasrestrictingfactorThe“A’’layerhadgreateffectsonthewholesedimentcoreComparedwith2008，claycontentinthes

7、edimentincreased，whilenutrientsaltinthesedimentdecreasedin2009Grainstructureinthesedimentchangedmostgreatlyofa11Andgrainstructureinthesedimenthadgreateffectsonthedepthdistributionofbacterialabundanteandnutrientinthesedim