Opportunity-cost-method

Guides

• Exapion ulicis

  Gorse Seed Weevil

  Exapion ulicis is a small seed-feeding weevil specialized on gorse (Ulex europaeus). Adults are light gray with a prominent snout roughly half the body length. The species is native to western Europe and has been introduced to New Zealand, California, Hawaii, and other regions as a biological control agent targeting invasive gorse populations. Larval feeding destroys seeds within pods, reducing plant spread, while adult feeding on stems and spines causes minor damage.

  biological-controlinvasive-species-managementseed-predatorhost-specializationtemporal-isolationBrentidaeColeopteraUlex-europaeusgorsewestern-EuropeCaliforniaNew-ZealandHawaiispring-activityoviposition-cuespod-fecundityparasitoidseed-destructionnoctuidpest-control-agentestablished-introductionnative-range-Europeintroduced-range-PacificChileBelgiumOregonnorthern-Californiaforest-gapspasturesnatural-areasseed-lossintensity-of-attackreproductive-isolationecological-specializationsympatric-divergencehost-phenologypod-sizeseed-contentfemale-choicefeeding-damageround-holesstem-feedingspine-feedinglarval-developmentpupal-period6-8-weeks-larval-feeding2-months-pupationwithin-pod-developmentseed-to-ovule-ratiomature-seedsintact-seedsparasitization-ratepopulation-abundancefecund-pod-targetingwhole-plant-traitsflower-traitspod-traitschoice-experimentscommon-gardenBrittanyScotlandReunionhost-availabilityseasonal-activitymorphological-identificationmitochondrial-sequencesnuclear-sequencesphylogenyhost-racesdivergent-selectionecological-speciationsympatric-populationsspring-infestationautumn-infestationintroduced-with-gorsenot-initially-introducedinvasive-plantplant-insect-interactionsoviposition-behaviorfeeding-behaviorpreference-patternsmultiple-trait-usesurface-cuesinternal-cuespod-characteristicshost-choiceplant-susceptibilityinvasion-biologyentomological-experimentalispan-pacific-entomologistdiversity-journalecological-entomologyCoombs-2004HEAR-photo-galleryiNaturalistGBIFNCBIForster-1771CurculionoideaApionidaeFabaceaeGenisteaenoxious-weedagent-of-biological-pest-controllight-graylong-snoutstraight-snout2-3-mmsmall-weevilseed-weevilgorse-seed-weevilestablished-populationspercentage-of-pods-infestedspatial-variationtemporal-variationseed-setseed-productionseed-predation-impactecosystem-serviceweed-biological-controlclassical-biological-controlinundative-biological-controlself-sustaining-populationsnon-target-effectshost-specificityreproductive-phenologyphenological-matchingphenological-isolationallochronic-speciationtemporal-nicheresource-partitioningcompetitive-exclusioncharacter-displacementmolecular-phylogeneticsCOIITSmorphological-charactersindividual-variationenvironmental-variationmitochondrial-DNAnuclear-DNAspecies-differentiationgenetic-divergenceecological-divergenceadaptive-radiationhost-shifthost-race-formationsympatric-speciationreinforcementprezygotic-isolationpostzygotic-isolationhabitat-fragmentationpopulation-structuregene-flowlocal-adaptationphenotypic-plasticitygenetic-driftnatural-selectionsexual-selectionfounder-effectbottleneckinvasion-geneticsenemy-releaseevolutionary-potentialrapid-evolutioncontemporary-evolutioneco-evolutionary-dynamicscommunity-ecologytrophic-interactionsfood-webecosystem-functionecosystem-processnutrient-cyclingenergy-flowpopulation-dynamicsmetapopulationsource-sinkdispersalcolonizationestablishmentspreadimpact-assessmentnon-target-riskefficacyestablishment-successpopulation-establishmentfield-releasemonitoringevaluationadaptive-managementintegrated-pest-managementsustainable-agricultureconservation-biological-controlaugmentative-biological-controlinoculative-biological-controlnatural-enemyherbivorephytophagousmonophagousoligophagouspolyphagousspecialistgeneralistco-evolutioncoevolutionary-arms-raceplant-defenseherbivore-offenseinduced-defenseconstitutive-defensedirect-defenseindirect-defensevolatile-organic-compoundsextrafloral-nectariestrophic-cascadesapparent-competitionenemy-mediated-apparent-competitionintraguild-predationmultitrophic-interactionstrait-mediated-indirect-effectsdensity-mediated-indirect-effectsecosystem-engineeringniche-constructionextended-phenotypeenvironmental-feedbackeco-evolutionary-feedbackevolutionary-rescuegenetic-rescueassisted-migrationmanaged-relocationconservation-translocationreintroductionrestoration-ecologyhabitat-restorationecological-restorationweed-managementrangeland-managementforest-managementprotected-area-managementbiodiversity-conservationecosystem-servicesprovisioning-servicesregulating-servicescultural-servicessupporting-servicessustainable-development-goalsAichi-targetsKunming-Montreal-global-biodiversity-frameworkIPBESIUCNCBDFAOEPPOregulatory-frameworkrisk-analysisenvironmental-impact-assessmentcost-benefit-analysisdecision-supportstakeholder-engagementsocial-licensepublic-acceptancecommunicationeducationoutreachcitizen-scienceiNaturalist-observationsoccurrence-recordsspecimen-recordsmuseum-collectionsvoucher-specimenstype-specimensholotypeparatypesyntypelectotypeneotypeoriginal-descriptionsubsequent-designationtaxonomic-revisionphylogenetic-revisionmonographfield-guideidentification-keydiagnostic-charactersillustrationphotographymicroscopyscanning-electron-microscopymolecular-techniquesDNA-barcodingmetabarcodingenvironmental-DNApopulation-geneticsphylogeographylandscape-geneticsseascape-geneticsisolation-by-distanceisolation-by-environmentisolation-by-resistanceleast-cost-pathcircuit-theoryspecies-distribution-modelingecologica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