How complex should models be? Comparing correlative and mechanistic range dynamics models.

Détails

ID Serval
serval:BIB_77ECDD8EFD18
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
How complex should models be? Comparing correlative and mechanistic range dynamics models.
Périodique
Global change biology
Auteur(s)
Fordham D.A., Bertelsmeier C., Brook B.W., Early R., Neto D., Brown S.C., Ollier S., Araújo M.B.
ISSN
1365-2486 (Electronic)
ISSN-L
1354-1013
Statut éditorial
Publié
Date de publication
03/2018
Peer-reviewed
Oui
Volume
24
Numéro
3
Pages
1357-1370
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Résumé
Criticism has been levelled at climate-change-induced forecasts of species range shifts that do not account explicitly for complex population dynamics. The relative importance of such dynamics under climate change is, however, undetermined because direct tests comparing the performance of demographic models vs. simpler ecological niche models are still lacking owing to difficulties in evaluating forecasts using real-world data. We provide the first comparison of the skill of coupled ecological-niche-population models and ecological niche models in predicting documented shifts in the ranges of 20 British breeding bird species across a 40-year period. Forecasts from models calibrated with data centred on 1970 were evaluated using data centred on 2010. We found that more complex coupled ecological-niche-population models (that account for dispersal and metapopulation dynamics) tend to have higher predictive accuracy in forecasting species range shifts than structurally simpler models that only account for variation in climate. However, these better forecasts are achieved only if ecological responses to climate change are simulated without static snapshots of historic land use, taken at a single point in time. In contrast, including both static land use and dynamic climate variables in simpler ecological niche models improve forecasts of observed range shifts. Despite being less skilful at predicting range changes at the grid-cell level, ecological niche models do as well, or better, than more complex models at predicting the magnitude of relative change in range size. Therefore, ecological niche models can provide a reasonable first approximation of the magnitude of species' potential range shifts, especially when more detailed data are lacking on dispersal dynamics, demographic processes underpinning population performance, and change in land cover.
Mots-clé
Animal Distribution, Animals, Birds/physiology, Climate Change, Ecosystem, Forecasting, Models, Biological, Population Dynamics, Species Specificity, climate change, hybrid ecological niche model, independent model validation, land use, mechanistic model, metapopulation and dispersal dynamics, species distribution model, transferability
Pubmed
Web of science
Open Access
Oui
Création de la notice
22/11/2017 18:15
Dernière modification de la notice
16/05/2019 17:42
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