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简介：Afterthesingle-strainabilitiesoforganic-pollutant-degradingbacteriainbioremediationofsedimentenvironmentofshrimpculturearedetermined,themultistraindegradingeffectofthecompositionsofdifferentstrainsismeasured.Theresultsindicatethatthemulti-strainsgroupshavehigherdegradingabilitythanthesingle-straingroups.Three-straingroupsarebetterthantwo-straingroups,andfourstraingroupsarebetterthanthree-straingroupsandfive-straingroups,thegroupscomposedofstrainsLt7222,Lt7511,Fc6308andGy7018hasthebestdegradingeffect,theCODMnremovalrateis73.2%in66h,andgetsto82.7%in114h,30%higherthanthatofthebestsingle-straingroup;GroupsofLt7222,Lt7511,Lt7451andGy7018arethesecond,whoseCODMnremovalrateis82.1%in114h,Itissuggestedthatmulti-speciesbacteriabeusedasfunctionalbacteriainbiorernediationofmaricultureenvironment.

简介：Thebottomsedimentsamplesweregatheredduringislandinvestigationin1994andintheperiodofcarryingoutthenaturalsciencefundprojectofFujianin1999.Thecomposition,distributionandassemblagecharacteristicsofheavymineralswhichgranularitydistributesfrom0.063to0.125mminthesedimentfromJiulongRiverestuaryarestudiedinthepaper.Theresultsshowthatthereare49kindsofheavymineralsandtheaveragecontentofthemis9.38%.Thedominantandcharacteristicmineralsaremagnetite,hematite,epidote,ilmenite,limonite,hornblende,zircon,andalusite,biotiteandsoon.4mineralassemblagezones(Ⅰ.ThewatercoursegatewayofJiulongRivermineralzone,Ⅱ.ThenorthernestuaryofJiulongRivermineralzone,Ⅲ.Thesouthernestuarymineralzone,Ⅳ.TheeasternestuaryofJiulongRivermineralzone),canbedividedbasedontheheavymineralcontentsandthedistributioncharacteristics,whichnotonlyrelatestothemattersourcesbutalsoiscontrolledbyhydrodynamicconditionandthesedimentaryenvironmentintheJiulongRiverestuary.

简介：Xiangshanbayisanarrowsemi-closedbayandsituatedonthenorthwesterncoastoftheEastChinaSea.Overpastdecades,ithasbecometoamajorbaywithintensivehumanactivities,denseurbanizedarea,andpoorwaterquality.Theaimofthispaperwastorevealtheecologicalstatusthroughtheelucidationofthespeciescomposition,abundance,biomassanddiversityofmacrobenthosinthisbay.SixintertidalsectionsweresurveyedfromJanuary2007toNovember2008quarterly.SectionsTG,HDandXHarelocatedinthethreeinnerbays,sectionsQJandWSarelocatednearthethermalpowerplants,andsectionXXislocatedattheouterpartofXiangshanBay.Greatvariationsinmacrobenthoscommunitywereindentified,andthespeciescompositionofthecommunityinthepresentstudyshowedthedominanceintheorderofmolluscs(bivalvesandgastropods),crustaceansandothers,andonlyfewPolychaetawererecorded.Onlythreedominantspecies,Littorinabrevicula,Ilyplaxtansuiensis,andCerithideacingulatawerecollectedinallthesections,andatotalof19dominantspecieswererecordedonlyinonesection.Two-wayANOVAanalysesofabundanceindicatedthatthereweresignificantdifferencesamongsectionsorseasons.Shannon-Wienerdiversityindex(H’)haditsmaximum(2.45)insectionQJ,andminimum(1.76)insectionTG.Multipleirregulark-dominanceplotsclearlyshowedthatthestudyareawaspollutedandthemacrobenthoscommunitywasunderstress.WeconcludethatthemacrobenthosofXiangshanBayhavebeendisturbedbyhumanactivities,especiallyattheinteriorbay.

简介：TheGCanalysisoffattyacidoffourspeciesofmarinemicroalgaeculturedatdifferenttemperatureshowsthatthetemperaturehasdistincteffectsonthecompositionandunsaturateddegreeoffattyacidofmicroalgae.ThepercentagesofTPUFAinTFAandthenumberofmeandouble-bondoffattyacidsotIsochrysisgalbana,DunaliellasalinaandPhaeodactylumtricornutumdecreasewiththeascendingtemperature,whilethoseofTMUFAandTSFAincreaseundertheconditionsofthepresentexperiment.ThecontentofTPUFAandthenumberofmeandouble-bondsofChlorellasp.firstdecreaseandthenincrease,withtheminimumoccurringat20℃.

简介：Heavymineralswithasizerangeof0.125～0.250mminthesurficialsedimentofMinjiangEstuaryarestudied.Thirty-fourheavymineralshavebeenidentified,withanaveragecontentof1.92%.Majormineralsincludemagnetite,epidote,hematite,hornblende,ilmenite,andzirconmica.Thesetypesarethesameasthoseinthe0.063～0.125mmrange;however,theaveragecontentislower,whichrevealsthattheheavymineralsinMinjiangEstuaryaremainlyenrichedinthevery-finesandfraction.Accordingtothecontentanddistributioncharacteristicsofthemajorheavyminerals,MinjiangEstuarycanbedividedinto4mineralassemblagezones.Ineachzonetheassemblageofheavymineralsisgreatlyaffectedbythehydrodynamicconditionandthesedimentaryenvironment.HeavymineraltypesalsoshowthatdetritalmattersinMinjiangEstuaryareoriginatedfromtheweatheringanderosionofthebedrockintheMinjiangRiverdrainagearea.

简介：Thispaperreportssiliconandoxygenisotopesof20kindsofigneousrocksandtheirmajorelementsfromtheeasternManusBasin.Combiningsiliconandoxygenisotopicdatafromotherstudies,wesupposethatbothδ30Siandδ18OvaluesincreasewiththeincreasingofSiO2content.Itmeansthatthefractionationofsiliconandoxygenisotopesareaffectedbythesilicacontent.ThepositivecorrelationbetweenCaO/Al2O3ratiosandMgOandthatbetweenSi/AlandSiO2contentindicatethatclinopyroxeneisthepredominantmineralphaseinoursamples.Wesupposethatthefractionationofsiliconandoxygenisotopesareinfluencedbymineralfractionalcrystallization.Probably,itisduetotheirdifferentsiliconandoxygenbridges.Inthisstudy,theδ30Simeanvalue=-0.17‰±0.17‰andδ18Omeanvalue=+6.07‰±0.57‰arehigherthannormalδ30Siandδ18Ovaluesofmantle,andweproposethattheseigneousrocksintheeasternManusBasinareaffectedbyhydrothermalalteration.

简介：BasedontrawlsurveysintheBeringSeaandChukchiSeaduringthe2010ChineseNationalArcticResearchExpedition,fishbiodiversitycharacteristics,suchasfishcomposition,dominantspecies,biodiversity,andfaunalcharacteristicswereconducted.WealsodiscussedtheresponsesoffishestothequickchangesinArcticclimate.Theresultsshowedthatatotalof41speciesin14familieswererecordedinthesewaters.ThedominantspecieswereHippoglossoidesrobustus,Boreogadussaida,Myoxocephalusscorpius,Lumpenusfabricii,andArtediellusscaber.Therewere35coldwaterspecies,accountingfor85.37%,andsixcoldtemperatespecies,occupying14.63%.Thehabitattypesoffishcouldbegroupedasfollows:35speciesofdemersalfishes,fivebenthopelagicfishes,andonepelagicfish.TheShannon–Wienerdiversityindex(H)(rangebetween0and2.18,1.21onaverage)wasnothigh,anddescendedfromsouthtonorth.ClimatechangehascausedsomefishestoshiftalongtheirlatitudinalandlongitudinaldistributionaroundtheArcticandSubarcticareas,andthiscouldleadtothedeclineofArcticfisheryresources.

简介：AninvivofluorescencediscriminationtechniqueforphytoplanktonpopulationwasdevelopedbyusingWaveletpackettransform,clusteranalysisandnon-negativeleastsquares.Thetechniquewasusedtoanalyzewatersamplesfromdifferentsearegions.Forsimulativemixtures,whendominantspeciesaccountfor60%,70%,80%,90%atthedivisionlevel,thecorrectdiscriminationratios(CDRs)are83.0%,99.1%,99.7%and99.9%withtherelativecontentsof58.5%,68.4%,77.7%and86.3%,respectively;whenthealgaedominanceare60%,70%,80%,90%,100%atthegenuslevel,theCDRsare86.1%,94.9%,95.2%,96.8%and96.7%,respectively.Forlaboratorymixtures,theCDRsare88.1%and78.4%atthedivisionandgenuslevel,respectively.Forfieldsamples,theCDRswere91.7%and80%atthedivisionandgenuslevel,respectively(mesocosmexperiments),andtheCDRswere100%and66.7%atthedivisionandgenuslevel,respectively(JiaozhouBay).ThefluorometrictechniquewasusedtoestimatethephytoplanktoncommunitycompositionandrelativeabundanceofdifferentclassesfortheApril2010cruiseintheYellowSeawiththeresultsagreeingwiththoseinpublishedpapersbyotherauthors.

简介：Thecomposition,assemblageanddistributioncharacteristicsofheavymineralsfrom63to125μmgrainsizesinsurfacesedimentfromtheXinghuaBay(17stations)arestudied.Themattersourceofsiltandtherelationshipbetweenheavymineralsandsedimentaryenvironmentarealsodiscussed.Theresultsshowthatthereare37kindsofheavymineralsandtheaveragecontentofthemis12.08%,whichexceeds6%comparedwiththeMeizhouBay(5.67%).Thedominantmineralsaremagnetite,hornblende,epidote,ilmenite,hematite,limonite,zirconandsoon.MineralkindsrevealthatthesourcesofsiltinthisbayarethefluvialinputanderodedproductsofbedrockincircumjacentlandandislandsoftheXinghuaBay.However,themattersourcefromoutsidethisbayisless.FourmineralassemblagezonescanbedividedbasedonheavymineralcontentsanddistributioncharacteristicsintheXinghuaBay,whicharenotonlyinfluencedbymattersource,butalsocontrolledbyhydrodynamicconditionandsedimentaryenvironmentintheXinghuaBay.

简介：TheJiaozhouBayischaracterizedbyheavyeutrophicationthatisassociatedwithintensiveanthropogenicactivities.FourcoresedimentsfromtheJiaozhouBayareanalyzedusingbulktechnologies,includingsedimentarytotalorganiccarbon(TOC),totalnitrogen(TN),thestablecarbon(δ~(13)C)andnitrogen(δ~(15)N)isotopiccompositiontoobtainthecomprehensiveunderstandingofthesourceandcompositionofsedimentaryorganicmatterandfurthershedlightontheenvironmentalchangesoftheJiaozhouBayonacentennialtimescale.ResultssuggestthattheTOCandTNconcentrationsincreaseintheuppercore,havingindicatedaprobableeutrophicationprocesssincethe1920sintheinnerbayandthe2000sinthebaymouth.TheTOCandTNconcentrationsoutsidethebayhavealsochangedsince1916owingtothevariationofterrigenousinput.ConsideringTOC/TNratio,δ~(13)Candδ~(15)N,itcanbeconcludedthereisamixtureofterrigenousandmarineorganicmattersourcesinthestudyarea.Asimpletwoend-member(terrigenousandmarine)mixingmodelusingδ~(13)Cindicatsthat45%–79%ofTOCintheJiaozhouBayisfromthemarinesource.TheenvironmentalchangesoftheJiaozhouBayarerecordedbygeochemicalproxies,whichareinfluencedbytheintensiveanthropogenicactivities(e.g.,extensiveuseoffertilizers,anddischargeofsewage)andclimatechanges(e.g.,rainfall).

简介：GracilariatenuistipitatavarliuiZhangetXiaiscultivatedattwodifferentsalinities(21,33)inthelaboratoryfor4weeks.Thedailygrowthrateisdetermined.Thetotalagaryieldandfractionalagarcompositionareanalyzed.Resultsshowthatalgaegrowfasterinlowsalinity.Thetotalagaryieldishigherunderhighsalinityconditionsthanunderlowsalinityconditions.Amongtheeightfractionsextracted,theyieldsofcoldwaterextractand40%ethanolextractareaboutthehighest.Inlowsalinitiestheyieldsofautoclavedextractand60%ethanolextractarehigher,whiletheyieldofcoldwaterextractislowerrelativetohighsalinities.

简介：从在Zhujiang河(ZR)里进行的三巡航的数据，广东(CWGD)的沿海的水和在2003和2004期间的北华南海(NSCS)为估计颜料作文的相对重要性并且在修改浮游植物的特定的吸收系数包装效果被检验。三个调查区域与统治ZR和CWGD水的大房间和统治NSCS区域的小房间在他们的浮游植物社区广泛地不同。在颜料有的尺寸结构和附件的变化很在叶绿素上完成浮游植物的一特定的吸收系数。尺寸索引分别地在440and675nm占了特定的吸收系数的大约42%变化和33%。用多重回归分析途径，为每件样品的颜料集中是计算的。除叶绿素以外的附件颜料主要穿蓝色衣服的contributetoabsorption吸收-到-为大约44%，43%和53%的光谱和他们在为ZR，CWGD和NSCS的440nm的全部的浮游植物吸收的一般水准上的吸收报道的绿区域区域。在附件颜料之中，光合的类胡萝卜素(著名PSC)在ZR和CWGD水里起一个主导的作用，当在NSCS象PSC一样的非光合的类胡萝卜素(著名PPC)有重要贡献时。因为在海藻的人口的尺寸结构和附件颜料的变化在学习区域贡献了特定的吸收系数的可变性，这些因素可以在未来简历明确地被考虑—导出叶绿素的光算法集中更精确地。

简介：从Changjiang河(长江)河口，Hangzhou海湾，和他们的邻近的水的表面沉积为他们的谷物尺寸分发，器官的碳(OC)集中，和稳定的碳同位素作文被分析(13C)。把分析基于这，大约36件表面沉积样品从各种各样的环境被选择并且分开了成沙(>0.250公里，0.1250.250公里，0.0630.125公里)并且淤泥(0.0250.063公里)由湿筛的分别方法的部分，并且推进进淤泥--(0.0040.025公里)并且泥土大小(<0.004公里)由离心的分别的部分。六个谷物尺寸范畴的沉积为他们的OC和13探索谷物的C内容在学习区域缩放沉积OC的作文和运输路径。从对粗糙的部分好，分别地，OC内容是1.18%，0.51%，0.46%，0.42%，0.99%，和0.48%当时13Cwas21.64,22.03,22.52,22.46,22.36，and22.28分别地。在每个尺寸范畴，OC贡献分别地是42.96%，26.06%，9.82%，5.75%，7.09%，和8.33%。在泥土和好淤泥部分的OC内容(<0.025公里)是大约69.02%。高OC集中主要被发现在近海在Changjiang河河口的东北，在在Changjiang河和Hangzhou海湾的更低的河口的现代沉积，并且在气旋的埃迪的现代沉积现代沉积到济州岛的西南。与13体积沉积的C显示在Changjiang河河口的陆上的器官的材料是搬运朝海的方向并且经由二条小径驱散现代沉积到气旋的埃迪到济州岛的西南：一个人是Changjiang河的结果冲淡的水(CDW)北方江苏沿海的水流和黄海沿海的水流驾驶的向东北的延长分支，当另一个是CDW的结果时台湾温暖的水流驾驶的向南方的延长分支。

简介：Harmfulalgalblooms(HABs)haveledtoextensiveecologicalandenvironmentalissuesandhugeeconomiclosses.VariousHABcontroltechniqueshavebeendeveloped,andbiologicalmethodshavebeenpaidmoreattention.Algicidalbacteriaisageneraldesignationforbacteriawhichinhibitalgalgrowthinadirectorindirectmanner,andkillordamagethealgalcells.AmetabolitewhichisstronglytoxictothedinoflagellateAlexandriumtamarensewasproducedbystrainDH46ofthealga-lysingbacteriumAlteromonassp.Thecultureconditionswereoptimizedusingasingle-factortestmethod.Factorsincludingcarbonsource,nitrogensource,temperature,initialpHvalue,rotationalspeedandsalinitywerestudied.Theresultsshowedthatthecultivationofthebacteriaat28℃and180rmin-1withinitialpH7and30saltcontcentrationfavoredboththecellgrowthandthelysingeffectofstrainDH46.TheoptimalmediumcompositionforstrainDH46wasdeterminedbymeansofuniformdesignexperimentation,andthemostimportantcomponentsinfluencingthecelldensityweretryptone,yeastextract,solublestarch,NaNO3andMgSO4.Whenthefollowingculturemediumwasused(tryptone14.0g,yeastextract1.63g,solublestarch5.0g,NaNO31.6g,MgSO42.3gin1L),thelargestbacterialdryweight(7.36gL-1)wasobtained,whichwasanenhancementof107%comparedtotheinitialmedium;andthealgallysisratewasashighas98.4%whichincreasednearly10%afteroptimization.