Influence of metal exposure history on trace metal uptake and accumulation by marine invertebrates

《Influence of metal exposure history on trace metal uptake and accumulation by marine invertebrates》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、ARTICLEINPRESSEcotoxicologyandEnvironmentalSafety61(2005)145–159www.elsevier.com/locate/ecoenvRapidcommunicationInfluenceofmetalexposurehistoryontracemetaluptakeandaccumulationbymarineinvertebratesa,bWen-XiongWang,PhilipS.RainbowaDepartmentofBiology,TheHongKongUniv

2、ersityofScienceandTechnology(HKUST),ClearWaterBay,Kowloon,HongKong,ChinabDepartmentofZoology,TheNaturalHistoryMuseum,CromwellRoad,LondonSW75BD,UKReceived5July2004;receivedinrevisedform30December2004;accepted24January2005Availableonline16March2005AbstractThispaperre

3、viewsrecentstudiesontheinfluenceoftracemetalexposurehistoryonsubsequentmetaluptakeinmarineinvertebrates,particularlybivalvesandbarnacles.Tracemetalexposuremayinducespecificmetal-bindingligands.Metallothionein-likeproteinsappeartoplayanimportantroleinmediatingmetalupt

4、akeandhenceaccumulation,especiallyforCd.OtherligandssuchassulfideareimportantforAgbiokineticchangesinbivalves.Theincorporationoftracemetalsintometal-richgranulesappearstohavelittleifanyeffectinmodifyingtracemetaluptake.Furthermore,metalsalsointeractstronglyintheirac

5、cumulationbymarineanimals.Generally,dissolvedHguptakeisreducedfollowingexposuretoothermetalssuchasAg,Cd,Cu,andZn.PreexposureofmarinemusselstoZnalsocausesconcomitantchangesintheuptakeofothermetalssuchasCdsharingsimilartransportpathways.Ingeneral,barnaclesarelessresp

6、onsivethanmusselstotracemetalexposure,presumablybecauseofthedominanceofdetoxificatorypathwaysinwhichtheaccumulatedmetalsareboundingranules(relativelybiologicallyinactivepools).Thetissuebodyburdenandthedetoxificatoryfateofmetalsinanimalsseemtobemoreimportantinaffectin

7、gmetalaccumulationthanthenatureoftheexposureroutes(aqueousvs.dietary)oroftheexposureregimes.Tracemetalaccumulationmayalsobevariableindifferentnaturalpopulationsofbivalvesasaresultofdifferentphysicochemicalenvironmentsandhistoriesofexposure.Wefinallysuggestafewareasf

8、orfutureresearchinthisfield.r2005ElsevierInc.Allrightsreserved.Keywords:Metals;Preexposure;Invertebrates1.Introductionmodel(FIAM)andmorerecentlyth