感潮河段沉積物細菌數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：環境科學指導教師：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