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Article Dans Une Revue Ecological Modelling Année : 2017

Comparison of habitat models for scarcely detected species

Résumé

When performinghabitatmodels,modellershavetochoosebetweenpresence-absenceandpresence- only modelstoestimatethehabitatpreferencesofaspecies.Primarily,thischoicedependsonthedata that areavailableandwhethereffortdataarerecordedinparalleltosightingdata.Forspeciesthatare rare orscarce,themodelshavetoaddressagreatnumberofzeros(i.e., no animalseen)thatweakensthe ability tomakesoundecologicalinferences.Wetestedtwotypesofhabitatmodels(presence-absence vs. presence-only)todeterminewhichtypebestdealtwithdatasetscontaininganexcessofzeros,and we appliedourmodelstoasightingdatasetthatincludedthecommon(Delphinus delphis) and striped (Stenella coeruleoalba) dolphin (approximately92%zeros).Weusedtwotypesofpresence-absencemod- els (GeneralisedAdditivemodels–GAMs,GeneralisedLinearModel–GLM)andonepresence-onlymodel, a MaxEntmodel,andweusedvariouscriteriatocomparethesemodels(i.e., AIC, deviances,rootograms and distributionpatternspredictedbythemodels).Overall,weobservedthatthepresence-absencemod- elsmadebetterpredictionsthanthepresence-onlymodel.Amongthepresence-absencemodels,theGAM with aNegativeBinomialdistributionwasbetteratpredictingsmalldelphinidshabitats,eventhough the GAMwithaTweediedistributionexhibitedsimilarresults.However,thezero-inflatedPoissondis- tributions exhibitedlessconvincingresultsandwascontrarytowhatwasexpected.Finally,despite92% zeros, ourdatasetwasnotzero-inflated.Ourstudydemonstratestheimportanceofselectingappropriate models tomakereliablepredictionsofhabitatuseforspeciesthatarerareorscarce.
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hal-01511665 , version 1 (21-04-2017)

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Paternité - Partage selon les Conditions Initiales

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Auriane Virgili, Mélanie Racine, Matthieu Authier, Pascal P. Monestiez, Vincent Ridoux. Comparison of habitat models for scarcely detected species. Ecological Modelling, 2017, 346, pp.88-98. ⟨10.1016/j.ecolmodel.2016.12.013⟩. ⟨hal-01511665⟩
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