Potential distributions of invasive vertebrates in the Iberian Peninsula under projected changes in climate extreme events



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Baquero, Rocío A. and Márcia Barbosa, A. and Ayllón, Daniel and Guerra, Carlos and Sánchez Sánchez, Enrique and Araújo, Miguel B. and Nicola, Graciela G. (2021) Potential distributions of invasive vertebrates in the Iberian Peninsula under projected changes in climate extreme events. Diversity and Distributions, 27 (11). pp. 2262-2276. ISSN 1366-9516

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Official URL: https://doi.org/10.1111/ddi.13401


Invasive alien species (IAS) can cause profound impacts on ecosystem function and diversity, human health, well-being and livelihoods. Climate change is an important driver of biological invasions, so it is critical to develop models and climate-driven scenarios of IAS range shifts to establish preventive measures. In this study, we analyse how projected changes in the frequency and magnitude of climate extreme events could affect the spread of the six most widely distributed invasive vertebrate species in the Iberian Peninsula.

Iberian Peninsula.

Red avadavat (Amandava amandava), common waxbill (Estrilda astrild), monk parakeet (Myiopsitta monachus), rose-ringed parakeet (Psittacula krameri), American mink (Neovison vison) and pond slider (Trachemys scripta).

We followed best-practice standards for species distribution models (SDMs) regarding handling of the response and predictor variables, model building and evaluation using metrics that assess different facets of model performance. We used an ensemble approach with four modelling methods of varying complexity, including both regression-based and tree-based machine-learning algorithms. We analysed five regional models for current (1971–2000) and future climate (2021–2050). We used principal components analysis to assess consensus among model outputs and positively weighed predictions from well-performing models.

Selected models showed high consensus and good predictive capacity on block cross-validation areas. Generalized Linear Models and Generalized Additive Models scored highest in reliability (calibration), but Bayesian Additive Regression Trees provided the best balance between calibration and discrimination capacity. Forecasts include visible changes in environmental favourability, with losses generally outweighing the gains, but with some areas becoming more favourable for several species.

Main conclusions
Increased frequency and/or intensity of climate extreme events associated with ongoing climate change are projected to reduce overall invasion risk for the species examined although increases in favourability should be expected locally.

Item Type:Article
Uncontrolled Keywords:biological invasions; climate change; conservation planning; distribution shifts; extreme climate events; invasive alien species; species distribution models
Subjects:Medical sciences > Biology > Ecology
ID Code:73051
Deposited On:22 Jun 2022 14:18
Last Modified:22 Jun 2022 14:25

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