IEGEBA 24053
INSTITUTO DE ECOLOGIA, GENETICA Y EVOLUCION DE BUENOS AIRES
Unidad Ejecutora - UE
artículos
Título:
Impact oftheinvasivemussel Limnoperna fortunei on glyphosate concentration in water
Autor/es:
EUGENIA DI FIORI , HAYDEE PIZARRO , MARIA DOSSANTOS AFONSO , DANIEL CATALDO
Revista:
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
Editorial:
ACADEMIC PRESS INC ELSEVIER SCIENCE
Referencias:
Lugar: Amsterdam; Año: 2012
ISSN:
0147-6513
Resumen:
The useofglyphosatehasincreaseddramaticallyduringthepastyearsaroundtheworld.Microbial communitiesarealteredwhenglyphosatereacheswaterbodies.Thefreshwatergoldenmussel Limnopernafortunei is aninvasivespeciesthathasrapidlydispersedsinceitwasintroducedin Argentinatwodecadesago.Musselsalteraquaticconditionsthroughtheirfiltratingactivityby increasingwaterclarityandnutrientrecycling.Weaimtoevaluatethepotentialcapacityofthe goldenmusseltoreduceglyphosateconcentrationinwater,inlaboratoryconditions.Firstly,the evasive responseofmusselstoglyphosate(10,20,and40mgl1) wasevaluatedandatoxicitytestwas carriedoutfortheseconcentrations.Athree-weekexperimentwasthenperformedtoassess glyphosatevariationundermusselpresencefortwomusselsizes.Finally,musselsroleonglyphosate concentrationwasevaluatedconsideringdifferentmusselparts(livingorganismsandemptyshells) throughanotherthree-weekexperiment.Laboratoryexperimentswereperformedintriplicateusing 2l microcosms.Aninitialglyphosateconcentrationbetween16and19mgl1 was used,andwhen musselsorvalvaewereadded,20organismsperaquariawereused.Sampleswereobtainedatdays0,1, 2, 4,8,14,and21.Glyphosatedecreasedby40%underlargemusselpresenceinbothexperiments,and was reducedby25%inemptyshelltreatments.Webelievethatpartoftheherbicidethatdisappears from thewatercolumnisadsorbedinvalvaesurface,whileanotherproportionisbeingmineralizedby microbialcommunitiesinshellsbiofilm.Themechanismsbywhichlivingmusselsincreaseglyphosate dissipationwouldbedegradation,possiblymediatedbybacteriaassociatedtomusselsmetabolism. Glyphosatehalf-lifedependedonmusselandvalvaepresenceandvariedwithmusselsize. L. fortunei presence (eitheraliveorasemptyvalvae)altersglyphosateconcentrationinwater.Weprovide preliminaryobservationsfromlaboratoryexperiments,withstrongpotentialecologicalconsequences, abouttwostressorsthatcouldbeactingjointlyontheenvironment.Limnopernafortunei is aninvasivespeciesthathasrapidlydispersedsinceitwasintroducedin Argentinatwodecadesago.Musselsalteraquaticconditionsthroughtheirfiltratingactivityby increasingwaterclarityandnutrientrecycling.Weaimtoevaluatethepotentialcapacityofthe goldenmusseltoreduceglyphosateconcentrationinwater,inlaboratoryconditions.Firstly,the evasive responseofmusselstoglyphosate(10,20,and40mgl1) wasevaluatedandatoxicitytestwas carriedoutfortheseconcentrations.Athree-weekexperimentwasthenperformedtoassess glyphosatevariationundermusselpresencefortwomusselsizes.Finally,musselsroleonglyphosate concentrationwasevaluatedconsideringdifferentmusselparts(livingorganismsandemptyshells) throughanotherthree-weekexperiment.Laboratoryexperimentswereperformedintriplicateusing 2l microcosms.Aninitialglyphosateconcentrationbetween16and19mgl1 was used,andwhen musselsorvalvaewereadded,20organismsperaquariawereused.Sampleswereobtainedatdays0,1, 2, 4,8,14,and21.Glyphosatedecreasedby40%underlargemusselpresenceinbothexperiments,and was reducedby25%inemptyshelltreatments.Webelievethatpartoftheherbicidethatdisappears from thewatercolumnisadsorbedinvalvaesurface,whileanotherproportionisbeingmineralizedby microbialcommunitiesinshellsbiofilm.Themechanismsbywhichlivingmusselsincreaseglyphosate dissipationwouldbedegradation,possiblymediatedbybacteriaassociatedtomusselsmetabolism. Glyphosatehalf-lifedependedonmusselandvalvaepresenceandvariedwithmusselsize. L. fortunei presence (eitheraliveorasemptyvalvae)altersglyphosateconcentrationinwater.Weprovide preliminaryobservationsfromlaboratoryexperiments,withstrongpotentialecologicalconsequences, abouttwostressorsthatcouldbeactingjointlyontheenvironment.
