Vol. 19 No. 1 (2024)
Articles

The tale of the black viper: distribution and bioclimatic niche modelling of melanistic Vipera aspis in Italy

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  • Matteo R. Di Nicola,
  • Francesco P. Faraone,
  • Andrea V. Pozzi,
  • Nicolò Borgianni,
  • Lorenzo Laddaga,
  • Jean-Lou M. C. Dorne,
  • Gianmarco Minuti
Matteo R. Di Nicola
Unit of Dermatology and Cosmetology, IRCCS San Raffaele Hospital, Via Olgettina 60, 20132 Milan
Francesco P. Faraone
Dipartimento Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche, University of Palermo, Via Archirafi 18, 90123 Palermo
Andrea V. Pozzi
Molecular Ecology and Evolution Group, School of Environmental and Natural Sciences, Bangor University, Bangor, Wales
Nicolò Borgianni
Rewilding Apennines ETS, Gioia dei Marsi (AQ)
Lorenzo Laddaga
Società di Scienze Naturali del Verbano Cusio Ossola, Museo di Scienze Naturali, Collegio Mellerio Rosmini, Domodossola
Jean-Lou M. C. Dorne
Methodology and Scientific Support Unit, European Food Safety Authority (EFSA), Via Carlo Magno 1A, Parma 43126
Gianmarco Minuti
Department of Biology, Ecology & Biodiversity Research Unit, Vrije Universiteit Brussels, Brussels
DOI: https://doi.org/10.36253/a_h-15271

Published 2024-06-21

Keywords

  • Bioclimatic model,
  • Habitat suitability,
  • MaxEnt,
  • Mediterranean,
  • Melanism,
  • Snake,
  • Vipera aspis
    • ...More
    Less

How to Cite

Di Nicola, M. R., Faraone, F. P., Pozzi, A. V., Borgianni, N., Laddaga, L., Dorne, J.-L. M. C., & Minuti, G. (2024). The tale of the black viper: distribution and bioclimatic niche modelling of melanistic Vipera aspis in Italy. Acta Herpetologica, 19(1), 13–27. https://doi.org/10.36253/a_h-15271

Copyright (c) 2024 Matteo Riccardo Di Nicola, Francesco Paolo Faraone, Andrea Vittorio Pozzi, Nicolò Borgianni, Lorenzo Laddaga, JEAN-LOU M. C. DORNE, Gianmarco Minuti

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

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Abstract

For decades, the evolutionary role of melanism in reptiles has been highly debated. According to the thermal melanism hypothesis, melanistic phenotypes should provide thermal advantages, thus positively impacting various biological aspects of these individuals. Nevertheless, these benefits seem to be countered by environmental constraints and predatory pressure. Here, we mapped for the first time the distribution of the melanistic phenotypes in the highly polymorphic asp viper (Vipera aspis). We focused our research effort on the Italian peninsula, where this species reaches its highest level of taxonomic diversity with three currently described subspecies. Furthermore, we investigated via bioclimatic niche modelling, the influence of a wide array of bioclimatic variables on the distribution of melanism in Italian asp vipers. In general, our results seem to support the implications of the thermal melanism hypothesis, highlighting the central influence of mean annual temperature and elevation on the geographic distribution of melanistic V. aspis. At the finest scale, our analyses have highlighted a distinction in bioclimatic niches among the three assessed subspecies. However, further fine-scale investigations are needed in order to exclude the potential influence of latitude and elevation on the observed the intersubspecific bioclimatic niche segregation pattern.

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