Unisexual rock lizard might be outcompeting its bisexual progenitors in the Caucasus

Tarkhnishvili, D and Gavashelishvili, A and Avaliani, A and Murtskhvaladze, M and Mumladze, Levan (2010) Unisexual rock lizard might be outcompeting its bisexual progenitors in the Caucasus. Biological Journal of the Linnean Society, 101 (2). pp. 447-460.

Tarkhnishvili et al. - 2010 - Unisexual rock lizard might be outcompeting its bisexual progenitors in the Caucasus.pdf

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We compared the distributions, abundances and ecological requirements of parthenogenetic lizard Darevskia dahli and its bisexual progenitors, D. portschinskii and D. mixta, in Georgia. We developed a regression model relating the species abundances with the distribution of climates. Darevskia portschinskii lives in warmer and drier climates than D. mixta; D. dahli has the intermediate requirements. Temperature is more important than humidity for D. portschinskii, humidity is more important for D. mixta and both temperature and humidity are important for D. dahli. Suitable habitats of all three species overlap broadly; however, the observed ranges partly overlap only for D. dahli and D. portschinskii. The observed abundance of each species, related to its predicted abundance, is lower at the sites with potential competitors. Darevskia dahli occupies a higher proportion of the suitable habitats and has higher abundances than the progenitor species. Competition with D. dahli is an important factor determining current distribution pattern of D. portschinskii and D. mixta. The parthenogen is a stronger competitor than the bisexual breeders and potential advantages of the bisexual reproduction remain unrealized in the given temporal and spatial scale. To explain domination of bisexually breeding lizards on the global scale, considering climate changes in geological timescale is necessary. 2010 The Linnean Society of London, Biological Journal of the Linnean Society, 2010, 101, 447460.

Item Type: Article
Uncontrolled Keywords: correlative model,darevskia,ecological niche model,europe,glm,lacertidae,presence absence model,reptilia
Subjects: Q Science > Evolution
Q Science > Ecology
Depositing User: Dr ლევან მუმლაძე
Date Deposited: 23 Mar 2016 07:27
Last Modified: 23 Mar 2016 07:27
URI: http://eprints.iliauni.edu.ge/id/eprint/4313

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