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Stellatelli OA, Bonavita MI, Victorel C, Gómez Alés R, Moreno Azócar DL, Block C, Cruz FB. Thermo-physiological changes and reproductive investment in a liolaemid lizard at the extreme of the slow-fast continuum. J Exp Biol 2024; 227:jeb247506. [PMID: 38826150 DOI: 10.1242/jeb.247506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Accepted: 05/22/2024] [Indexed: 06/04/2024]
Abstract
Gravid female lizards often experience reduced thermal preferences and impaired locomotor performance. These changes have been attributed to the physical burden of the clutch, but some authors have suggested that they may be due to physiological adjustments. We compared the thermal biology and locomotor performance of the lizard Liolaemus wiegmannii 1 week before and 1 week after oviposition. We found that gravid females had a thermal preference 1°C lower than that of non-gravid females. This was accompanied by a change in the thermal dependence of maximum running speed. The thermal optimum for locomotor performance was 2.6°C lower before oviposition than after. At relatively low temperatures (22 and 26°C), running speeds of females before oviposition were up to 31% higher than for females after oviposition. However, at temperatures above 26°C, females achieved similar maximum running speeds (∼1.5 m s-1) regardless of reproductive stage. The magnitude of the changes in thermal parameters and locomotor performance of L. wiegmannii females was independent of relative clutch mass (clutches weighed up to 89% of post-oviposition body mass). This suggests that the changes are not simply due to the clutch mass, but are also due to physiological adjustments. Liolaemus wiegmannii females simultaneously adjusted their own physiology in a short period in order to improve locomotor performance and allocated energy for embryonic development during late gravid stage. Our findings have implications for understanding the mechanisms underlying life histories of lizards on the fast extreme of the slow-fast continuum, where physiological exhaustion could play an important role.
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Affiliation(s)
- Oscar A Stellatelli
- Grupo Vertebrados, Instituto de Investigaciones Marinas y Costeras (IIMyC), Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata - Consejo Nacional de Investigaciones Científicas y Técnicas, B7602AYJ Mar del Plata, Buenos Aires, Argentina
| | - Mauro I Bonavita
- Instituto de Investigaciones en Biodiversidad y Medioambiente (INIBIOMA), Consejo Nacional de Investigaciones Científicas y ́ Técnicas - Universidad Nacional del Comahue, 8400 San Carlos de Bariloche, Río Negro, Argentina
| | - Candela Victorel
- Instituto de Investigaciones en Biodiversidad y Medioambiente (INIBIOMA), Consejo Nacional de Investigaciones Científicas y ́ Técnicas - Universidad Nacional del Comahue, 8400 San Carlos de Bariloche, Río Negro, Argentina
| | - Rodrigo Gómez Alés
- Gabinete Diversidad y Biología de Vertebrados del Árido (DIBIOVA), Departamento de Biología, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de San Juan, J5402DCS San Juan, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Centro Científico Tecnológico CONICET San Juan, J5400ARL San Juan, San Juan, Argentina
| | - Débora L Moreno Azócar
- Instituto de Investigaciones en Biodiversidad y Medioambiente (INIBIOMA), Consejo Nacional de Investigaciones Científicas y ́ Técnicas - Universidad Nacional del Comahue, 8400 San Carlos de Bariloche, Río Negro, Argentina
| | - Carolina Block
- Grupo Vertebrados, Instituto de Investigaciones Marinas y Costeras (IIMyC), Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata - Consejo Nacional de Investigaciones Científicas y Técnicas, B7602AYJ Mar del Plata, Buenos Aires, Argentina
| | - Félix B Cruz
- Instituto de Investigaciones en Biodiversidad y Medioambiente (INIBIOMA), Consejo Nacional de Investigaciones Científicas y ́ Técnicas - Universidad Nacional del Comahue, 8400 San Carlos de Bariloche, Río Negro, Argentina
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2
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Valdez Ovallez FM, Gómez Alés R, Astudillo V, Córdoba M, Fava G, Acosta R, Blanco G, Villavicencio J, Acosta JC. Thermal biology and locomotor performance of the Andean lizard
Liolaemus fitzgeraldi
(Liolaemidae) in Argentina. ACTA ZOOL-STOCKHOLM 2022. [DOI: 10.1111/azo.12440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Franco M. Valdez Ovallez
- Gabinete de Diversidad y Biología de Vertebrados del Árido, Departamento de Biología, Facultad de Ciencias Exactas, Físicas y Naturales Universidad Nacional de San Juan San Juan Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) San Juan Argentina
| | - Rodrigo Gómez Alés
- Gabinete de Diversidad y Biología de Vertebrados del Árido, Departamento de Biología, Facultad de Ciencias Exactas, Físicas y Naturales Universidad Nacional de San Juan San Juan Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) San Juan Argentina
| | - Vanesa Astudillo
- Gabinete de Diversidad y Biología de Vertebrados del Árido, Departamento de Biología, Facultad de Ciencias Exactas, Físicas y Naturales Universidad Nacional de San Juan San Juan Argentina
| | - Mariela Córdoba
- Gabinete de Diversidad y Biología de Vertebrados del Árido, Departamento de Biología, Facultad de Ciencias Exactas, Físicas y Naturales Universidad Nacional de San Juan San Juan Argentina
| | - Gustavo Fava
- Gabinete de Diversidad y Biología de Vertebrados del Árido, Departamento de Biología, Facultad de Ciencias Exactas, Físicas y Naturales Universidad Nacional de San Juan San Juan Argentina
| | - Rodrigo Acosta
- Gabinete de Diversidad y Biología de Vertebrados del Árido, Departamento de Biología, Facultad de Ciencias Exactas, Físicas y Naturales Universidad Nacional de San Juan San Juan Argentina
| | - Graciela Blanco
- Gabinete de Diversidad y Biología de Vertebrados del Árido, Departamento de Biología, Facultad de Ciencias Exactas, Físicas y Naturales Universidad Nacional de San Juan San Juan Argentina
| | - José Villavicencio
- Gabinete de Diversidad y Biología de Vertebrados del Árido, Departamento de Biología, Facultad de Ciencias Exactas, Físicas y Naturales Universidad Nacional de San Juan San Juan Argentina
| | - Juan Carlos Acosta
- Gabinete de Diversidad y Biología de Vertebrados del Árido, Departamento de Biología, Facultad de Ciencias Exactas, Físicas y Naturales Universidad Nacional de San Juan San Juan Argentina
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3
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A quantitative synthesis of and predictive framework for studying winter warming effects in reptiles. Oecologia 2022; 200:259-271. [PMID: 36100724 PMCID: PMC9547783 DOI: 10.1007/s00442-022-05251-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Accepted: 08/19/2022] [Indexed: 12/03/2022]
Abstract
Increases in temperature related to global warming have important implications for organismal fitness. For ectotherms inhabiting temperate regions, ‘winter warming’ is likely to be a key source of the thermal variation experienced in future years. Studies focusing on the active season predict largely positive responses to warming in the reptiles; however, overlooking potentially deleterious consequences of warming during the inactive season could lead to biased assessments of climate change vulnerability. Here, we review the overwinter ecology of reptiles, and test specific predictions about the effects of warming winters, by performing a meta-analysis of all studies testing winter warming effects on reptile traits to date. We collated information from observational studies measuring responses to natural variation in temperature in more than one winter season, and experimental studies which manipulated ambient temperature during the winter season. Available evidence supports that most reptiles will advance phenologies with rising winter temperatures, which could positively affect fitness by prolonging the active season although effects of these shifts are poorly understood. Conversely, evidence for shifts in survivorship and body condition in response to warming winters was equivocal, with disruptions to biological rhythms potentially leading to unforeseen fitness ramifications. Our results suggest that the effects of warming winters on reptile species are likely to be important but highlight the need for more data and greater integration of experimental and observational approaches. To improve future understanding, we recap major knowledge gaps in the published literature of winter warming effects in reptiles and outline a framework for future research.
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4
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Chiu-Valderrama J, Siurob-Espíndola B, Zúñiga-Vega J, de la Vega-Pérez AD, Canales-Gordillo B, Jaramillo-Alba J, Akcali C, Cuervo-Robayo A, Pérez-Mendoza H. Nowhere to go: Potential distribution shifts of a widespread lizard under two climate change scenarios. ECOL INFORM 2022. [DOI: 10.1016/j.ecoinf.2022.101735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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5
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Ariano‐Sánchez D, Mortensen RM, Wilson RP, Bjureke P, Reinhardt S, Rosell F. Temperature and barometric pressure affect the activity intensity and movement of an endangered thermoconforming lizard. Ecosphere 2022. [DOI: 10.1002/ecs2.3990] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Affiliation(s)
- Daniel Ariano‐Sánchez
- Department of Natural Sciences and Environmental Health, Faculty of Technology, Natural Sciences and Maritime Sciences University of South‐Eastern Norway Bø Telemark Norway
- Centro de Estudios Ambientales y Biodiversidad Universidad del Valle de Guatemala Guatemala City Guatemala
| | - Rasmus M. Mortensen
- Department of Natural Sciences and Environmental Health, Faculty of Technology, Natural Sciences and Maritime Sciences University of South‐Eastern Norway Bø Telemark Norway
| | - Rory P. Wilson
- Biosciences, College of Science Swansea University Swansea Wales UK
| | - Peder Bjureke
- Department of Natural Sciences and Environmental Health, Faculty of Technology, Natural Sciences and Maritime Sciences University of South‐Eastern Norway Bø Telemark Norway
| | - Stefanie Reinhardt
- Department of Natural Sciences and Environmental Health, Faculty of Technology, Natural Sciences and Maritime Sciences University of South‐Eastern Norway Bø Telemark Norway
| | - Frank Rosell
- Department of Natural Sciences and Environmental Health, Faculty of Technology, Natural Sciences and Maritime Sciences University of South‐Eastern Norway Bø Telemark Norway
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6
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Mader S, Goldenberg J, Massetti F, Bisschop K, D’Alba L, Etienne RS, Clusella‐Trullas S, Shawkey MD. How melanism affects the sensitivity of lizards to climate change. Funct Ecol 2022. [DOI: 10.1111/1365-2435.13993] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Sebastian Mader
- Evolution and Optics of Nanostructures Group Department of Biology Ghent University Ghent Belgium
- Theoretical Research in Evolutionary Life Sciences Groningen Institute for Evolutionary Life Sciences University of Groningen Groningen The Netherlands
| | - Jonathan Goldenberg
- Evolution and Optics of Nanostructures Group Department of Biology Ghent University Ghent Belgium
| | - Federico Massetti
- Centre for Invasion Biology Department of Botany and Zoology Stellenbosch University Stellenbosch South Africa
| | - Karen Bisschop
- Theoretical Research in Evolutionary Life Sciences Groningen Institute for Evolutionary Life Sciences University of Groningen Groningen The Netherlands
- Terrestrial Ecology Unit Department of Biology Ghent University Ghent Belgium
- Institute for Biodiversity and Ecosystem Dynamics University of Amsterdam Amsterdam The Netherlands
| | - Liliana D’Alba
- Evolution and Optics of Nanostructures Group Department of Biology Ghent University Ghent Belgium
| | - Rampal S. Etienne
- Theoretical Research in Evolutionary Life Sciences Groningen Institute for Evolutionary Life Sciences University of Groningen Groningen The Netherlands
| | - Susana Clusella‐Trullas
- Centre for Invasion Biology Department of Botany and Zoology Stellenbosch University Stellenbosch South Africa
| | - Matthew D. Shawkey
- Evolution and Optics of Nanostructures Group Department of Biology Ghent University Ghent Belgium
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7
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OUP accepted manuscript. Biol J Linn Soc Lond 2022. [DOI: 10.1093/biolinnean/blab176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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8
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Correspondence between thermal biology and locomotor performance in a liolaemid lizard from the southeastern coastal Pampas of Argentina. J Therm Biol 2021; 105:103173. [DOI: 10.1016/j.jtherbio.2021.103173] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Revised: 12/12/2021] [Accepted: 12/19/2021] [Indexed: 11/22/2022]
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9
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Stellatelli OA, Vega LE, Block C, Rocca C, Bellagamba P, Dajil JE, Cruz FB. Latitudinal pattern of the thermal sensitivity of running speed in the endemic lizard Liolaemus multimaculatus. Integr Zool 2021; 17:619-637. [PMID: 34496145 DOI: 10.1111/1749-4877.12579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Physiological performance in lizards may be affected by climate across latitudinal or altitudinal gradients. In the coastal dune barriers in central-eastern Argentina, the annual maximum environmental temperature decreases up to 2°C from low to high latitudes, while the mean relative humidity of the air decreases from 50% to 25%. Liolaemus multimaculatus, a lizard in the family Liolaemidae, is restricted to these coastal dunes. We investigated the locomotor performance of the species at 6 different sites distributed throughout its range in these dune barriers. We inquired whether locomotor performance metrics were sensitive to the thermal regime attributable to latitude. The thermal performance breadth increased from 7% to 82% with latitude, due to a decrease in its critical thermal minimum of up to 5°C at higher latitudes. Lizards from high latitude sites showed a thermal optimum, that is, the body temperature at which maximum speed is achieved, up to 4°C lower than that of lizards from the low latitude. At relatively low temperatures, the maximum running speed of high-latitude individuals was faster than that of low-latitude ones. Thermal parameters of locomotor performance were labile, decreasing as a function of latitude. These results show populations of L. multimaculatus adjust thermal physiology to cope with local climatic variations. This suggests that thermal sensitivity responds to the magnitude of latitudinal fluctuations in environmental temperature.
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Affiliation(s)
- Oscar Aníbal Stellatelli
- Instituto de Investigaciones Marinas y Costeras (IIMyC), Universidad Nacional de Mar del Plata-CONICET, Facultad de Ciencias Exactas y Naturales, Mar del Plata, Argentina
| | - Laura E Vega
- Instituto de Investigaciones Marinas y Costeras (IIMyC), Universidad Nacional de Mar del Plata-CONICET, Facultad de Ciencias Exactas y Naturales, Mar del Plata, Argentina
| | - Carolina Block
- Instituto de Investigaciones Marinas y Costeras (IIMyC), Universidad Nacional de Mar del Plata-CONICET, Facultad de Ciencias Exactas y Naturales, Mar del Plata, Argentina
| | - Camila Rocca
- Instituto de Investigaciones Marinas y Costeras (IIMyC), Universidad Nacional de Mar del Plata-CONICET, Facultad de Ciencias Exactas y Naturales, Mar del Plata, Argentina
| | | | - Juan Esteban Dajil
- Instituto de Investigaciones Marinas y Costeras (IIMyC), Universidad Nacional de Mar del Plata-CONICET, Facultad de Ciencias Exactas y Naturales, Mar del Plata, Argentina
| | - Félix Benjamín Cruz
- Instituto de Investigaciones en Biodiversidad y Medioambiente (INIBIOMA), Universidad Nacional del Comahue - CONICET, San Carlos de Bariloche, Argentina
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10
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Brizio MV, Cabezas-Cartes F, Fernández JB, Gómez Alés R, Avila LJ. Vulnerability to global warming of the critically endangered Añelo Sand Dunes Lizard (Liolaemus cuyumhue) from the Monte Desert, Patagonia Argentina. CAN J ZOOL 2021. [DOI: 10.1139/cjz-2020-0305] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The body temperature of lizards is strongly influenced by the thermal quality of microhabitats, exploiting the favourable environmental temperatures, and avoiding exposure to extreme thermal conditions. For these reasons, reptile populations are considered to be especially vulnerable to changes in environmental temperatures produced by climate change. Here, we study the thermal physiology of the critically endangered Añelo Sand Dunes Lizard (Liolaemus cuyumhue Avila, Morando, Perez and Sites, 2009). We hypothesise that (i) there is a thermal coadaptation between optimal temperature for locomotor performance of L. cuyumhue and its thermal preference; (ii) L. cuyumhue lives in an environment with low thermal quality; and (iii) a rise in environmental temperatures due to global warming will impose a decrement in locomotor speed represented by lower warming tolerance and narrower thermal safety margins, increasing their already high vulnerability. We recorded field body temperatures (T b), preferred body temperatures (T pref), the operative temperature (T e), and the thermal sensitivity of locomotion at different body temperatures. Our results indicate that this lizard is not currently under environmental stress or exceeding its thermal limits, but that it is thermoregulating below T pref to avoid overheating, and that an increase in environmental temperature higher than 3.5 °C will strongly affect the use of microhabitats with direct sun exposure.
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Affiliation(s)
- M. Victoria Brizio
- Facultad de Ciencias del Ambiente y la Salud, Universidad Nacional del Comahue, CONICET, Buenos Aires 1400, Neuquén, 8300b, Neuquén, Argentina
| | - Facundo Cabezas-Cartes
- Laboratorio de Ecofisiología e Historia de vida de Reptiles, Instituto de Investigaciones en Biodiversidad y Medio Ambiente (INIBIOMA–CONICET), Universidad Nacional del Comahue, Quintral 1250, San Carlos de Bariloche, 8400, Río Negro, Argentina
| | - Jimena B. Fernández
- Laboratorio de Ecofisiología e Historia de vida de Reptiles, Instituto de Investigaciones en Biodiversidad y Medio Ambiente (INIBIOMA–CONICET), Universidad Nacional del Comahue, Quintral 1250, San Carlos de Bariloche, 8400, Río Negro, Argentina
| | - Rodrigo Gómez Alés
- Departamento de Biología, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de San Juan, CONICET, Av. Ignacio de la Roza 590 (O), Rivadavia, J5402DCS, San Juan, Argentina
| | - Luciano J. Avila
- Instituto Patagónico para el Estudio de los Ecosistemas Continentales (IPEEC–CONICET), Puerto Madryn, 9120, Chubut, Argentina
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11
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Vulnerability to climate change of a microendemic lizard species from the central Andes. Sci Rep 2021; 11:11653. [PMID: 34079000 PMCID: PMC8172825 DOI: 10.1038/s41598-021-91058-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Accepted: 05/20/2021] [Indexed: 11/08/2022] Open
Abstract
Given the rapid loss of biodiversity as consequence of climate change, greater knowledge of ecophysiological and natural history traits are crucial to determine which environmental factors induce stress and drive the decline of threatened species. Liolaemus montanezi (Liolaemidae), a xeric-adapted lizard occurring only in a small geographic range in west-central Argentina, constitutes an excellent model for studies on the threats of climate change on such microendemic species. We describe field data on activity patterns, use of microhabitat, behavioral thermoregulation, and physiology to produce species distribution models (SDMs) based on climate and ecophysiological data. Liolaemus montanezi inhabits a thermally harsh environment which remarkably impacts their activity and thermoregulation. The species shows a daily bimodal pattern of activity and mostly occupies shaded microenvironments. Although the individuals thermoregulate at body temperatures below their thermal preference they avoid high-temperature microenvironments probably to avoid overheating. The population currently persists because of the important role of the habitat physiognomy and not because of niche tracking, seemingly prevented by major rivers that form boundaries of their geographic range. We found evidence of habitat opportunities in the current range and adjacent areas that will likely remain suitable to the year 2070, reinforcing the relevance of the river floodplain for the species’ avoidance of extinction.
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12
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Ibargüengoytía NR, Medina M, Laspiur A, Qu YF, Peralta CAR, Sinervo B, Miles DB. Looking at the past to infer into the future: Thermal traits track environmental change in Liolaemidae. Evolution 2021; 75:2348-2370. [PMID: 33939188 DOI: 10.1111/evo.14246] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Accepted: 04/05/2021] [Indexed: 11/29/2022]
Abstract
The diversity of habitats generated by the Andes uplift resulted a mosaic of heterogeneous environments in South America for species to evolve a variety of ecological and physiological specializations. Species in the lizard family Liolaemidae occupy a myriad of habitats in the Andes. Here, we analyze the tempo and mode of evolution in the thermal biology of liolaemids. We assessed whether there is evidence of local adaptation (lability) or conservatism (stasis) in thermal traits. We tested the hypothesis that abiotic factors (e.g., geography, climate) rather than intrinsic factors (egg-laying [oviparous] or live-bearing [viviparous], substrate affinity) explain variation in field active body temperature (Tb ), preferred temperature (Tp ), hours of restriction of activity, and potential hours of activity. Although most traits exhibited high phylogenetic signal, we found variation in thermal biology was shaped by geography, climate, and ecological diversity. Ancestral character reconstruction showed shifts in Tb tracked environmental change in the past ∼20,000 years. Thermal preference is 3°C higher than Tb , yet exhibited a lower rate of evolution than Tb and air temperature. Viviparous Liolaemus have lower Tb s than oviparous species, whereas Tp is high for both modes of reproduction, a key difference that results in a thermal buffer for viviparous species to cope with global warming. The rapid increase in environmental temperatures expected in the next 50-80 years in combination with anthropogenic loss of habitats are projected to cause extirpations and extinctions in oviparous species.
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Affiliation(s)
- Nora Ruth Ibargüengoytía
- Ecophysiology and Life History of Reptiles: Research Laboratory. Instituto de Investigaciones en Biodiversidad y Medioambiente, Consejo Nacional de Investigaciones Científicas y Técnicas (INIBIOMA, CONICET-Universidad Nacional del Comahue), San Carlos de Bariloche, Río Negro, Argentina
| | - Marlin Medina
- CIEMEP, CONICET. Universidad Nacional de la Patagonia San Juan Bosco sede Esquel, Esquel, Chubut, Argentina
| | - Alejandro Laspiur
- Ecophysiology and Life History of Reptiles: Research Laboratory. Instituto de Investigaciones en Biodiversidad y Medioambiente, Consejo Nacional de Investigaciones Científicas y Técnicas (INIBIOMA, CONICET-Universidad Nacional del Comahue), San Carlos de Bariloche, Río Negro, Argentina
| | - Yan-Fu Qu
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, Jiangsu, China
| | | | - Barry Sinervo
- Department of Ecology and Evolutionary Biology, Coastal Sciences Building, 130, McAllister Way, University of California, Santa Cruz, CA, 95065, USA.,Deceased
| | - Donald B Miles
- Department of Biological Sciences, 131 Life Sciences Building, Ohio University, Athens, OH, 45701, USA
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13
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Gómez Alés R, Acosta JC, Valdez F, Martínez TA, Acosta R, Rodriguez Muñoz MJ, Fernández R, Corrales L. Comparative thermal ecophysiology in Pristidactylus scapulatus populations from the Puna region of Argentina. ZOOLOGY 2021; 145:125903. [PMID: 33639556 DOI: 10.1016/j.zool.2021.125903] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 01/31/2021] [Accepted: 02/03/2021] [Indexed: 11/19/2022]
Abstract
Reptiles are important models for understanding fundamental aspects of physiological ecology and for assessing how environmental change can impact biodiversity. Abiotic factors (micro-environmental temperatures, operative temperatures, thermal quality) may vary geographically along an altitudinal and latitudinal gradient, and therefore the different thermal resources available for thermoregulation also vary. Comparative analyses among populations provide an opportunity to understand how variation in abiotic factors can affect different ecophysiological traits of a species at different geographical points. Our objective was to carry out a comparative study between two populations of Pristidactylus scapulatus in the Puna region of Argentina, providing the first data available on thermal ecophysiology, thermoregulatory efficiency and locomotor performance of the species. We determined field body temperature, micro-environmental temperatures and operative temperatures. In the laboratory, we measured preferred temperatures and calculated the index of thermoregulatory efficiency. In addition, we recorded critical temperature (minimum and maximum) and we estimated the thermal sensitivity of locomotion by measuring sprint speed at different body temperatures; based on these data we calculated the optimal temperature for performance, the optimal performance breadth and thermal safety margin. Air temperatures and operative temperatures were different between sites. However, we only found differences between populations in the minimum critical temperatures, with these being lower at higher latitude. We note that P. scapulatus populations adjust optimal temperatures of performance to field body temperatures and preferred temperatures, which could reduce the costs of thermoregulation in lizards with limited daily activity and who inhabit sites with variable and unpredictable environment temperatures. We conclude that Pristidactylus scapulatus has thermal sensitivity in locomotor performance, is a moderate thermoregulator with respect to the environment and is a eurithermic lizard, which has thermal flexibility in the cold.
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Affiliation(s)
- Rodrigo Gómez Alés
- DIBIOVA (Gabinete Diversidad y Biología de Vertebrados del Árido), Departamento de Biología, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de San Juan, Av. Ignacio de la Roza 590 (O), Rivadavia, J5402DCS San Juan, Argentina; CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas), San Juan, Argentina.
| | - Juan Carlos Acosta
- DIBIOVA (Gabinete Diversidad y Biología de Vertebrados del Árido), Departamento de Biología, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de San Juan, Av. Ignacio de la Roza 590 (O), Rivadavia, J5402DCS San Juan, Argentina
| | - Franco Valdez
- DIBIOVA (Gabinete Diversidad y Biología de Vertebrados del Árido), Departamento de Biología, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de San Juan, Av. Ignacio de la Roza 590 (O), Rivadavia, J5402DCS San Juan, Argentina; CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas), San Juan, Argentina
| | - Tomás Agustín Martínez
- DIBIOVA (Gabinete Diversidad y Biología de Vertebrados del Árido), Departamento de Biología, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de San Juan, Av. Ignacio de la Roza 590 (O), Rivadavia, J5402DCS San Juan, Argentina; CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas), San Juan, Argentina
| | - Rodrigo Acosta
- DIBIOVA (Gabinete Diversidad y Biología de Vertebrados del Árido), Departamento de Biología, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de San Juan, Av. Ignacio de la Roza 590 (O), Rivadavia, J5402DCS San Juan, Argentina
| | - Melina Jesús Rodriguez Muñoz
- DIBIOVA (Gabinete Diversidad y Biología de Vertebrados del Árido), Departamento de Biología, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de San Juan, Av. Ignacio de la Roza 590 (O), Rivadavia, J5402DCS San Juan, Argentina; CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas), San Juan, Argentina
| | - Rubén Fernández
- DIBIOVA (Gabinete Diversidad y Biología de Vertebrados del Árido), Departamento de Biología, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de San Juan, Av. Ignacio de la Roza 590 (O), Rivadavia, J5402DCS San Juan, Argentina; CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas), San Juan, Argentina
| | - Lucas Corrales
- DIBIOVA (Gabinete Diversidad y Biología de Vertebrados del Árido), Departamento de Biología, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de San Juan, Av. Ignacio de la Roza 590 (O), Rivadavia, J5402DCS San Juan, Argentina; CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas), San Juan, Argentina
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14
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ObregÓn RL, Scolaro JA, IbargÜengoytÍa NR, Medina M. Thermal biology and locomotor performance in Phymaturus calcogaster: are Patagonian lizards vulnerable to climate change? Integr Zool 2020; 16:53-66. [PMID: 32822078 DOI: 10.1111/1749-4877.12481] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Behavioral and physiological traits of ectotherms are especially sensitive to fluctuations of environmental temperature. In particular, niche-specialist lizards are dependent on their physiological plasticity to adjust to changing environmental conditions. Lizards of the genus Phymaturus are viviparous, mainly herbivorous, and inhabit only rock promontories in the steppe environments of Patagonia and the Andes. Herein, we examine the vulnerability of the southernmost Phymaturus species to global warming: the endemic Phymaturus calcogaster, which lives in a mesic environment in eastern Patagonia. We studied body temperatures in the field (Tb ), preferred body temperatures in a thermogradient (Tpref ), the operative (Te ) and environmental temperatures, and the dependence of running performance on body temperature. P. calcogaster had a mean Tb (27.04°C) and a mean Te (31.15°C) both lower than their preferred temperature (Tpref = 36.61°C) and the optimal temperature for running performance (To = 37.13°C). Lizard activity seems to be restraint during the early afternoon due high environmental temperatures. However, both, the high safety margin and warming tolerance suggest that the expected increase in environmental temperatures due to global warming (IPCC report in 2018) would not threaten, but indeed enhance locomotor performance in this population.
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Affiliation(s)
- Rosa L ObregÓn
- Instituto de Diversidad y Evolución Austral, (CENPAT-CONICET), Puerto Madryn, Argentina.,Facultad de Ciencias Naturales, Universidad Nacional de la Patagonia San Juan Bosco, Trelew, Argentina
| | - Jose A Scolaro
- Instituto de Diversidad y Evolución Austral, (CENPAT-CONICET), Puerto Madryn, Argentina.,Facultad de Ciencias Naturales, Universidad Nacional de la Patagonia San Juan Bosco, Trelew, Argentina
| | - Nora R IbargÜengoytÍa
- Instituto de Investigaciones en Biodiversidad y Medioambiente, Consejo Nacional de Investigaciones Científicas y Técnicas (INIBIOMA-CONICET), San Carlos de Bariloche, Argentina
| | - Marlin Medina
- Centro de Investigación Esquel de Montaña y Estepa Patagónica, Consejo Nacional de Investigaciones Científicas y Técnicas (CIEMEP-CONICET), Esquel, Argentina
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15
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Ibargüengoytía NR, Kubisch E, Cabezas-Cartes F, Fernández JB, Duran F, Piantoni C, Medina MS, Sinervo B. Effects of Acute and Chronic Environmental Disturbances on Lizards of Patagonia. NATURAL AND SOCIAL SCIENCES OF PATAGONIA 2020. [DOI: 10.1007/978-3-030-42752-8_13] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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