Thermal biology of Phymaturus lizards: evolutionary constraints or lack of environmental variation?

Cruz, Félix Benjamín; Belver, Luciana Cecilia; Acosta, Juan Carlos; Villavicencio, Héctor J.; Blanco, Graciela; Cánovas, María G.

doi:10.1016/j.zool.2009.03.004

Cited by 57 publications

(39 citation statements)

References 42 publications

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“…Low T b s have also been found in the viviparous genus Phymaturus (Liolaemidae) from cold environments at high latitude in the Patagonian steppe (391-411S; P. tenebrosus: 29; P. zapalensis: 26.4 1C; Ibargüengoytía, 2005;Ibargüengoytía et al, 2008;Cruz et al, 2009) or from high altitude in northern lands (301-371S; 2000-4200 m asl) such as P. dorsimaculatus (22.5 1C; Cruz et al, 2009) and P. punae (29.4 1C;Ibargüengoytía et al, 2008).…”

Section: Discussionmentioning

confidence: 96%

Thermal relationships between body temperature and environment conditions set upper distributional limits on oviparous species

Medina¹,

Scolaro²,

Cruz³

et al. 2011

Journal of Thermal Biology

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Section: Discussionmentioning

confidence: 96%

Thermal relationships between body temperature and environment conditions set upper distributional limits on oviparous species

Medina¹,

Scolaro²,

Cruz³

et al. 2011

Journal of Thermal Biology

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“…For example, the thermal tolerance of Sceloporus undulatus does not vary according to the thermal conditions throughout its range (Buckley et al, unpublished manuscript). Similarly, poor relationships between climate and tolerance were observed among species of Phymaturus lizards (Cruz et al 2009). Other researchers have argued that behavioral thermoregulation has minimized selective pressures in thermal physiology (Bogert 1949;Huey et al 2003).…”

Section: Discussionmentioning

confidence: 99%

Physiological Variation among Invasive Populations of the Brown Anole (Anolis sagrei)

Kolbe¹,

Ehrenberger²,

Moniz³

et al. 2014

Physiological and Biochemical Zoology

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Invasive species often encounter novel climatic conditions when they spread outside of their native ranges. Invading populations can respond to novel conditions by acclimation or adaptation of physiological capacities, which may facilitate their spread. We investigated differences in physiological traits among three populations of an invasive lizard, the brown anole (Anolis sagrei), along the latitudinal extent of its invasion in the southeastern United States. We predicted latitudinal clines for most traits based on models of adaptation to climate. Consistent with the latitudinal cline in temperature and moisture, the mean critical thermal minimum and the mean rate of water loss were lowest for lizards in the northern population. Furthermore, these traits acclimated to either temperature or humidity in a direction consistent with adaptive phenotypic plasticity. By contrast, metabolic rates varied among populations but did not conform to our prediction based on a latitudinal cline in temperature. Critical thermal maxima, endurances, and sprint speeds were similar among populations. Despite the idea that tropical lizards have limited capacity for acclimation, we found variation among invasive populations of brown anoles, which could have partially resulted from acclimation. This physiological variation within the invasive range raises questions about the roles of plasticity and adaptation in the success of the invasion.

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“…The Andean and extra-Andean mountain systems of Argentina and Chile provide an interesting arena in which to study the ecological niche of lizards of the genus Phymaturus (Reptilia: Liolaemidae).This monophyletic genus presents conservative characteristics, since all species are saxicolous, herbivorous and viviparous (Scolaro et al 2008), and their thermal biology is remarkably similar across a wide geographic range (Cruz et al 2009). However, within the genus, two groups are clearly differentiated according their morphological characteristics (Cei 1986;Etheridge 1995), the palluma (=flagellifer) group in the north (between 25°and 39°S), and the patagonicus group in the south (between 36°and 46°S).…”

Section: Introductionmentioning

confidence: 99%

Predicting the environmental niche of the genusPhymaturus: Arepallumaandpatagonicusgroups ecologically differentiated?

Debandi¹,

Corbalán²,

Scolaro

et al. 2011

Austral Ecology

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The genus Phymaturus (Reptilia: Liolaemidae) is distributed in the mountains and rocky plateaux of Argentina and Chile and comprises two groups of species, palluma and patagonicus. The two lineages have diverged early in the evolution of the genus and up to today, there is very little geographical overlap between them.We worked with records of localities from the literature, herpetological collections and field data to evaluate habitat suitability of the genus Phymaturus. We used 11 environmental variables to develop environmental niche models (ENMs) for each group within the genus using the Maxent software, and to determine those variables that best explain the distribution of each group. We also estimated measures of niche similarity using ENMTools to determine whether niche differentiation is real or apparent. The geographical overlap between the groups was very low considering the large geographical range of the genus. Some variables, such as mean annual temperature, soil type and bare soil cover, have a high contribution to the models for both groups. The current niche overlap between Phymaturus groups indicates that the environmental niches of the palluma and patagonicus groups are not equivalent. Based on background analysis, we cannot reject the hypothesis that similarity (or divergence) between groups of Phymaturus is no more than expected based on the availability of habitat. The results of this study are a first approximation to the knowledge of the environmental variables associated with the palluma and patagonicus groups, and reveal that the ecological differences found between these groups are more likely due to habitat availability in their respective regions than to differences in habitat preferences.

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Thermal biology of Phymaturus lizards: evolutionary constraints or lack of environmental variation?

Cited by 57 publications

References 42 publications

Thermal relationships between body temperature and environment conditions set upper distributional limits on oviparous species

Thermal relationships between body temperature and environment conditions set upper distributional limits on oviparous species

Physiological Variation among Invasive Populations of the Brown Anole (Anolis sagrei)

Predicting the environmental niche of the genusPhymaturus: Arepallumaandpatagonicusgroups ecologically differentiated?

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