海洋浮游植物与生物碳汇

311820119ACTAECOLOGICASINICAVol．31No．18Sep．2011http//．ecologica．cn2009CB421202201105021-034077609340676089403060252011-01-152011-06-27*[e-mail]．．201131185372-5378．SunJ．Marinephytoplanktonandbiologicalcarbonsink．ActaEcologicaSinica201131185372-5378．*300457、、、、、TEPCO2。TEP。MarinephytoplanktonandbiologicalcarbonsinkSUNJun*CollegeofMarineScienceandEngineeringTianjinUniversityofScienceandTechnologyTianjin300457ChinaAbstractInthispaperweexaminedkeyprocessesforevaluatingbiologicalcarbonsinkinrelationtomarinephytoplanktonintheChinaSea．Currentphytoplanktoncarbon-sink-relatedprocessesarediscussedincludingprimaryproductionphytoplanktonsinkingzooplanktonfecalpelletpackageeffectsthemarinefoodchainphytoplanktondissolvedorganiccarbonproductionandsubsequentbacterialrepackagingtransparentexopolymerparticlesTEPandchangesinphytoplanktonfunctionalgroupsunderprojectedrisingpCO2．MarineprimaryproductionandtheTEPaggregationwebarespecificallyexamined．KeyregionalstudyareasinChinasuchasthecentralYellowSeaandtheYangtzeRiverestuaryarealsodiscussedaswellassuggestionsforfuturebiologicalcarbonsinkstudiesinChinausingdiatomsakeystonefunctionalgroup．KeyWordsbiologicalcarbonsinkphytoplanktonfunctionalgrouptransparentexopolymerparticlesTEPoceanacidification0．2%50%。。CO2。CO2。312CO231。http//．ecologica．cn、、2。。BiogeniccarbonPOCParticulateorganiccarbonDOCDissolvedorganiccarbon。CO2CO2。。。POC。POC。①、②③DOC、EPSextracellularpolysaccharide———④———。1、、、、、TEPTransparentexopolymerparticlesCO2。1Fig．1PathwayofcarbonsinkrelatedtomarinephytoplanktonTEPtransparentexopolymerparticlesPOCparticulateorganiccarbonDOCdissolvedorganiccarbonRDOCrecalcitrantdissolvedorganiccarbon1CO2。6①reductivepentosephosphatecycleCalvin-BensonCycle-C33②reductivetricarboxylicacidcycle4③Areductiveacetyl-CoAcycle5④3-3-hydroxypropionatecycle6⑤3-/4-3-hydroxypropionate/4-hydroxybutyratecycle7⑥/4-dicarboxylate/4-hydroxybutyrate373518http//．ecologica．cncycle8。Elysiachlorotica7。C3-C49C4CO2CO210-11。NormalizedDifferenceVegetationIndex140gC·m－2·a－148．5GtC/a46．2%12。①10513②14。2、、。、。/、/。。。、CO2。v=2×g×ρ－ρ0×r2/9×ηvρρ0rηgvrρ。。。1516。。SiO2SiO2。。。SiO22．634g/cm3。30%17。CaCO32．7g/cm3POC。CaCO3CO2Ca2++2HCO－3#CaCO3+H2O+CO2$CO2。CO2=PIC/POC=CaCO3/Corg18-19。473531http//．ecologica．cn。。。199313CO220。。3。、、。DOCDOCtwilightzone。。、、、POC1%—100%。、、———。、。。。。。。。“”“”“”。。21。4。。。、/、。。/CO2。90%10%573518http//．ecologica．cn。10%22。/。。5、、、、CO2。DOCDOCCO2。①PDOCphotosyntheticdissolvedorganiccarbon23。PDOC②DOC③DOC④DOC⑤DOC⑥POC-CO224-25。DOCDOCRDOCRecalcitrantdissolvedorganiccarbon/“”26。DOC①CO2②。6TEPTEP。C∶N∶P。TEP、、、、、。TEP。CNRedfieldTEP。TEP27-28。7CO2TEP-。。“”CO2。、、。、673531http//．ecologica．cnCO2“”。CO2NCO229。CO2PSiCO2PSi29。CO2TEPTEPCO230。CO2NNH4Skeletonema、。CO2、。。、TEP。。References1DewarWKBinghamRJIversonRLNowacekDPStLaurentLCWiebePH．DoesthemarinebiospheremixtheoceanJournalofMarineResearch2006644541-561．2IPCC．IPCCFourthAssessmentReport-AR4-ClimateChange2007ThePhysicalScienceBasis．CambridgeCambridgeUniversityPress20071-996．3LefebvreSLawsonTFryerMZakhleniukOVLloydJCRainesCA．Increasedsedoheptulose-17-bisphosphataseactivityintransgenictobaccoplantsstimulatesphotosynthesisandgrowthfromanearlystageindevelopment．PlantPhysiology20051381451-460．4EvansMCBuchananBBArnonDI．Anewferredoxin-dependentcarbonreductioncycleinaphotosyntheticbacterium．ProceedingsoftheNationalAcademyofSciencesoftheUnitedStatesofAmerica1966554928-934．5RagsdaleSWPierceE．Acetogenesisandthewood-ljungdahlpathwayofCO2fixation．BiochimicaetBiophysicaActa20081784121873-1898．6HerterSFuchsGBacherAEisenreichW．AbicyclicautotrophicCO2fixationpathwayinChloroflexusaurantiacus．JournalofBiologicalChemistry20022772320277-202837BergIAKockelkornDBuckelWFuchsG．A3-hydroxypropionate/4-hydroxybutyrateautotrophiccarbondioxideassimilationpathwayinArchaea．Science200731858571782-1786．8HuberHGallenbergerMJahnUEylertEBergIAKockelkornDEisenreichWFuchsG．Adicarboxylate/4-hydroxybutyrateautotrophiccarbonassimilationcycleinthehyperthermophilicArchaeumIgnicoccushospitalis．ProceedingsoftheNationalAcademyofSciencesoftheUnitedStatesofAmerica2008105227851-7856．9Descolas-GrosCFontugneMR．Carbonfixationinmarinephytoplanktoncarboxylaseactivitiesandstablecarbon-isotoperatiosphysiologicalandpaleoclimatologicalaspects．MarineBiology19858711-6．10ReinfelderJRMilliganAJMorelFMM．TheroleoftheC4pathwayincarbonaccumulationandfixationinamarinediatom．PlantPhysiology200413542106-2111．11ReinfelderJRKraepielAMLMorelFMM．UnicellularC4photosynthesisinamarinediatom．Nature20004076807996-999．12FieldCBBehrenfeldMJRandersonJTFalkowskiP．Primaryproductionofthebiosphereintegratingterrestrialandoceaniccomponents．Science19982815374237-240．13MarbàNDuarteCMAgustíS．Allometricscalingofplantlifehistory．ProceedingsoftheNationalAcademyofSciencesoftheUnitedStatesofAmerica20071044015777-15780．773518http//．ecologica．cn14FalkowskiPG．Theocean'sinvisibleforest-Marinephytoplanktonplayacriticalroleinregulatingtheearth'sclimate．CouldtheyalsobeusedtocombatglobalwarmingScientificAmerican200228754-61．15RichardsonTLJacksonGA．S