mathematics Article Species Distribution Models and Niche Partitioning among Unisexual Darevskia dahli and Its Parental Disexual (D. portschinskii, D. mixta) Rock Lizards in the Caucasus Varos Petrosyan 1,*, Fedor Osipov 1, Vladimir Bobrov 1 , Natalia Dergunova 1, Andrey Omelchenko 1 , Alexander Varshavskiy 1, Felix Danielyan 2 and Marine Arakelyan 2 1 A.N. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Moscow 119071, Russia;
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[email protected] Received: 14 July 2020; Accepted: 6 August 2020; Published: 10 August 2020 Abstract: Among vertebrates, true parthenogenesis is known only in reptiles. Parthenogenetic lizards of the genus Darevskia emerged as a result of the hybridization of bisexual parental species. However, uncertainty remains about the mechanisms of the co-existence of these forms. The geographical parthenogenesis hypothesis suggests that unisexual forms can co-exist with their parental species in the “marginal” habitats. Our goal is to investigate the influence of environmental factors on the formation of ecological niches and the distribution of lizards. For this reason, we created models of species distribution and ecological niches to predict the potential geographical distribution of the parthenogenetic and its parental species. We also estimated the realized niches breadth, their overlap, similarities, and shifts in the entire space of predictor variables. We found that the centroids of the niches of the three studied lizards were located in the mountain forests.