Use of non-timber forest products from invasive alien Prosopis species(mesquite) and native trees in South Africa: implications for management-中国Betway体育网页登陆

摘要 Background:Prosopisspecieshavebeenintroducedtomanyareasoutsidetheirnativerangetoprovidebenefitstolocalcommunities.SeveralProsopisspeciesandtheirhybrids(hereafter"mesquite")have,however,becomenaturalisedandinvasiveandnowgeneratesubstantialcosts.Managementoptionsarelimitedbecauseofthecomplexconflictsofinterestregardingbenefitsandcosts.Managementpoliciesandstrategiesmusttakeaccountofsuchconflicts,butfurtherinsightsareneededonthedimensionsofusesandimpactsbeforesuchinformationcanbeusefullyapplied.CurrentpolicyinSouthAfricaallowsforthegrowthanduseofmesquiteinoneprovince,butnotinotherswhereitscontrolismandatory.Wereportonastudytoquantifythedirectuseandperceptionsofnon-timberforestproducts(NTFPs)frommesquiteandnativetreesinSouthAfrica.Methods:Semi-structureshouseholdinterviewswereconductedwithvariousstakeholdergroupstoidentifywhattreeproductsareused,toascertainamountsusedaswellastogaugeperceptionsofnaturalresourceusebetweendifferenttreespeciesanduseovertime.Results:Thedirecthouseholdusevalueofnativetreeswashigherthanthatofmesquite,andlocalstakeholdersattachedgreatervaluetoproductsfromnativetreesthanfrommesquite.Therefore,nativetreesareandwillstillbepreferentiallyharvested,andmesquiteisunlikelytoofferprotectiontonativespeciesbyprovidinganalternativesourceofproducts.Mesquitepodsdo,however,providevaluableadditionalresources(fodderandmedicinalproducts).Theuseofbothnativetreesandmesquiteisdecreasingastheincomesofpoorerhouseholdsriseandasalternativeenergysourcesbecomeavailable.Thebenefitsandrelianceonmesquitearenotashighaspreviouslyassumedandtheimpactsfrommesquiteinvasionscreatelargeproblemsforlocalcommunities.Conclusion:Thisstudyprovidesfurtherevidencethattheimpactsofmesquiteexceedthebenefits,lendingsupportforapolicytoreducenegat

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Use of non-timber forest products from invasive alien Prosopis species(mesquite) and native trees in South Africa: implications for management

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