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The effect of reproductive occurrences and human descriptors on invasive pet distribution modelling: Trachemys scripta elegans in the Iberian Peninsula

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  • Banha, Filipe
  • Gama, Mafalda
  • Anastácio, Pedro Manuel

Abstract

Pet release is important for the introduction of invasive species but propagule pressure from this pathway is higher in areas with intense human presence. In fact, potential invaders are frequently released into areas with sub-optimal environmental conditions, and are not able to reproduce or establish viable populations. SDMs are mainly focused on determining species environmental suitability and in the case of invasive species modelling these do not integrate the invasion as a process, missing the crucial human contribution. Our model aims to introduce novelty by incorporating variables representing human activities such as pet shop densities or human areas. These are directly related with the studied species invasion pathway. Here we investigate the binomial influence of reproductive occurrences and human-related variables on invasive pet distribution modelling. As our model species, we used the red-eared slider turtle, Trachemys scripta elegans (T.s.e.), an iconic invasive species with worldwide dissemination. Ten variables (predictors) were selected for T.s.e. modelling. These were four bioclimatic (BIO1=Annual Mean Temperature, BIO10=Mean Temperature of Warmest Quarter, BIO11=Mean Temperature of Coldest Quarter and BIO12=Annual Precipitation), three topographic (altitude, slope and the compound topographical index (CTI)), and three human variables (pet shop density, distance to urban areas and human density). To model suitability for T.s.e. establishment we tested four combinations of three sets of descriptor variables (human, environmental and both), with two types of occurrence records (reproductive or all records), at a global (worldwide) or regional scale (Iberian Peninsula (IP)). For each combination, an ensemble of niche-based models (NBMs) was built using nine different types of models implemented in BIOMOD2.

Suggested Citation

  • Banha, Filipe & Gama, Mafalda & Anastácio, Pedro Manuel, 2017. "The effect of reproductive occurrences and human descriptors on invasive pet distribution modelling: Trachemys scripta elegans in the Iberian Peninsula," Ecological Modelling, Elsevier, vol. 360(C), pages 45-52.
    • Handle: RePEc:eee:ecomod:v:360:y:2017:i:c:p:45-52
    DOI: 10.1016/j.ecolmodel.2017.06.026
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    References listed on IDEAS

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    1. Gama, M. & Crespo, D. & Dolbeth, M. & Anastácio, P., 2016. "Predicting global habitat suitability for Corbicula fluminea using species distribution models: The importance of different environmental datasets," Ecological Modelling, Elsevier, vol. 319(C), pages 163-169.
    2. Dennis Rödder & Sebastian Schmidtlein & Michael Veith & Stefan Lötters, 2009. "Alien Invasive Slider Turtle in Unpredicted Habitat: A Matter of Niche Shift or of Predictors Studied?," PLOS ONE, Public Library of Science, vol. 4(11), pages 1-9, November.
    3. Oecd, 2009. "Climate Change and Africa," OECD Journal: General Papers, OECD Publishing, vol. 2009(1), pages 5-35.
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    1. Usó-Doménech, Josep-Lluis & Nescolarde-Selva, Josué-Antonio & Lloret-Climent, Miguel & González-Franco, Lucía & Alonso-Stenberg, Kristian, 2018. "Spatial model of a pyrophite shrub in Mediterranean terrestrial ecosystems," Ecological Modelling, Elsevier, vol. 384(C), pages 333-340.

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