Persistent negativeeffectsofpesticidesonbiodiversityandbiological control potentialonEuropeanfarmland

Abstract : During thelast50years,agriculturalintensificationhascaused manywildplantandanimalspeciestogoextinctregionally or nationallyandhasprofoundlychangedthefunctioningofagro-ecosystems.Agricultural intensificationhasmany components, suchaslossoflandscapeelements,enlargedfarmand fieldsizesandlargerinputsoffertilizerandpesticides. However, verylittleisknownabouttherelative contributionofthesevariablesto thelarge-scalenegativeeffectson biodiversity. Inthisstudy,wedisentangled theimpactsofvariouscomponentsofagriculturalintensificationonspecies diversity ofwildplants,carabidsandground-nestingfarmlandbirdsandonthebiologicalcontrolofaphids. In aEurope-widestudyineightWestandEastEuropeancountries,wefoundimportantnegativeeffectsof agriculturalintensificationonwildplant,carabidandbirdspeciesdiversityandonthepotentialforbiologicalpest control,asestimatedfromthenumberofaphidstakenbypredators.Ofthe13componentsofintensificationwe measured,useofinsecticidesandfungicideshadconsistentnegativeeffectsonbiodiversity.Insecticidesalsoreduced the biologicalcontrolpotential.Organicfarmingandotheragri-environmentschemesaimingtomitigatethenegative effectsofintensivefarmingonbiodiversitydidincreasethediversityofwildplantandcarabidspecies,but–contrary to ourexpectations–notthediversityofbreedingbirds. We concludethatdespitedecadesofEuropeanpolicytobanharmfulpesticides,thenegativeeffectsofpesticideson wild plantandanimalspeciespersist,atthesametimereducingtheopportunitiesforbiologicalpestcontrol.If biodiversityistoberestoredinEuropeandopportunitiesaretobecreatedforcropproductionutilizingbiodiversity- based ecosystemservicessuchasbiologicalpestcontrol,theremustbeaEurope-wideshifttowardsfarmingwith minimaluseofpesticidesoverlargeareas.
Type de document :
Article dans une revue
Basic and Applied Ecology, Elsevier, 2010, 11, pp.97-105. 〈10.1016/j.baae.2009.12.001〉
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Contributeur : Martine Lacalle <>
Soumis le : mercredi 20 octobre 2010 - 10:08:21
Dernière modification le : mercredi 16 mai 2018 - 11:23:28

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Flavia Geiger, Jan Bengtsson, Franck Berendse, Wolfgang W. Weisser, Mark Emmerson, et al.. Persistent negativeeffectsofpesticidesonbiodiversityandbiological control potentialonEuropeanfarmland. Basic and Applied Ecology, Elsevier, 2010, 11, pp.97-105. 〈10.1016/j.baae.2009.12.001〉. 〈hal-00527709〉

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