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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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Giacometti D, Palaoro AV, Leal LC, de Barros FC. How seasonality influences the thermal biology of lizards with different thermoregulatory strategies: a meta-analysis. Biol Rev Camb Philos Soc 2024; 99:409-429. [PMID: 37872698 DOI: 10.1111/brv.13028] [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: 11/24/2022] [Revised: 10/10/2023] [Accepted: 10/13/2023] [Indexed: 10/25/2023]
Abstract
Ectotherms that maintain thermal balance in the face of varying climates should be able to colonise a wide range of habitats. In lizards, thermoregulation usually appears as a variety of behaviours that buffer external influences over physiology. Basking species rely on solar radiation to raise body temperatures and usually show high thermoregulatory precision. By contrast, species that do not bask are often constrained by climatic conditions in their habitats, thus having lower thermoregulatory precision. While much focus has been given to the effects of mean habitat temperatures, relatively less is known about how seasonality affects the thermal biology of lizards on a macroecological scale. Considering the current climate crisis, assessing how lizards cope with temporal variations in environmental temperature is essential to understand better how these organisms will fare under climate change. Activity body temperatures (Tb ) represent the internal temperature of an animal measured in nature during its active period (i.e. realised thermal niche), and preferred body temperatures (Tpref ) are those selected by an animal in a laboratory thermal gradient that lacks thermoregulatory costs (i.e. fundamental thermal niche). Both traits form the bulk of thermal ecology research and are often studied in the context of seasonality. In this study, we used a meta-analysis to test how environmental temperature seasonality influences the seasonal variation in the Tb and Tpref of lizards that differ in thermoregulatory strategy (basking versus non-basking). Based on 333 effect sizes from 137 species, we found that Tb varied over a greater magnitude than Tpref across seasons. Variations in Tb were not influenced by environmental temperature seasonality; however, body size and thermoregulatory strategy mediated Tb responses. Specifically, larger species were subjected to greater seasonal variations in Tb , and basking species endured greater seasonal variations in Tb compared to non-basking species. On the other hand, the seasonal variation in Tpref increased with environmental temperature seasonality regardless of body size. Thermoregulatory strategy also influenced Tpref , suggesting that behaviour has an important role in mediating Tpref responses to seasonal variations in the thermal landscape. After controlling for phylogenetic effects, we showed that Tb and Tpref varied significantly across lizard families. Taken together, our results support the notion that the relationship between thermal biology responses and climatic parameters can be taxon and trait dependent. Our results also showcase the importance of considering ecological and behavioural aspects in macroecological studies. We further highlight current systematic, geographical, and knowledge gaps in thermal ecology research. Our work should benefit those who aim to understand more fully how seasonality shapes thermal biology in lizards, ultimately contributing to the goal of elucidating the evolution of temperature-sensitive traits in ectotherms.
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Affiliation(s)
- Danilo Giacometti
- Departamento de Ecologia e Biologia Evolutiva, Universidade Federal de São Paulo, Rua Professor Artur Riedel 275, Diadema, São Paulo, 09972-270, Brasil
- Department of Biological Sciences, Brock University, St. Catharines, ON, L2S3A1, Canada
| | - Alexandre V Palaoro
- Departamento de Ecologia e Biologia Evolutiva, Universidade Federal de São Paulo, Rua Professor Artur Riedel 275, Diadema, São Paulo, 09972-270, Brasil
- Department of Material Sciences and Engineering, 490 Sirrine Hall, Clemson University, 515 Calhoun Dr, Clemson, SC, 29634, USA
- Programa de Pós-Graduação em Ecologia, Universidade de São Paulo, Rua do Matão Trav. 14, São Paulo, 05508-090, Brasil
- Departamento de Zoologia, Universidade Federal do Paraná, Avenida Coronel Francisco H. dos Santos 100, Curitiba, Paraná, 82590-300, Brasil
| | - Laura C Leal
- Departamento de Ecologia e Biologia Evolutiva, Universidade Federal de São Paulo, Rua Professor Artur Riedel 275, Diadema, São Paulo, 09972-270, Brasil
| | - Fábio C de Barros
- Departamento de Ecologia e Biologia Evolutiva, Universidade Federal de São Paulo, Rua Professor Artur Riedel 275, Diadema, São Paulo, 09972-270, Brasil
- Departamento de Biociências, Universidade do Estado de Minas Gerais, Avenida Juca Stockler 1130, Passos, Minas Gerais, 37900-106, Brasil
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3
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Doucette LI, Duncan RP, Osborne WS, Evans M, Georges A, Gruber B, Sarre SD. Climate warming drives a temperate-zone lizard to its upper thermal limits, restricting activity, and increasing energetic costs. Sci Rep 2023; 13:9603. [PMID: 37311881 DOI: 10.1038/s41598-023-35087-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Accepted: 05/12/2023] [Indexed: 06/15/2023] Open
Abstract
Lizards are considered vulnerable to climate change because many operate near their thermal maxima. Exposure to higher temperatures could reduce activity of these animals by forcing them to shelter in thermal refugia for prolonged periods to avoid exceeding lethal limits. While rising temperatures should reduce activity in tropical species, the situation is less clear for temperate-zone species where activity can be constrained by both low and high temperatures. Here, we measure the effects of natural variation in environmental temperatures on activity in a temperate grassland lizard and show that it is operating near its upper thermal limit in summer even when sheltering in thermal refuges. As air temperatures increased above 32 °C, lizard activity declined markedly as individuals sought refuge in cool microhabitats while still incurring substantial metabolic costs. We estimate that warming over the last two decades has required these lizards to increase their energy intake up to 40% to offset metabolic losses caused by rising temperatures. Our results show that recent increases in temperature are sufficient to exceed the thermal and metabolic limits of temperate-zone grassland lizards. Extended periods of high temperatures could place natural populations of ectotherms under significantly increased environmental stress and contribute to population declines and extinction.
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Affiliation(s)
- Lisa I Doucette
- Centre for Conservation Ecology and Genomics, Institute for Applied Ecology, University of Canberra, Bruce, ACT, 2617, Australia.
- Department of Natural Resources and Renewables, 136 Exhibition Street, Kentville, NS, B4N 4ES, Canada.
| | - Richard P Duncan
- Centre for Conservation Ecology and Genomics, Institute for Applied Ecology, University of Canberra, Bruce, ACT, 2617, Australia
| | - William S Osborne
- Centre for Conservation Ecology and Genomics, Institute for Applied Ecology, University of Canberra, Bruce, ACT, 2617, Australia
| | - Murray Evans
- Conservation Research, Environment and Planning Directorate, ACT Government, Mitchell, ACT, 2911, Australia
| | - Arthur Georges
- Centre for Conservation Ecology and Genomics, Institute for Applied Ecology, University of Canberra, Bruce, ACT, 2617, Australia
| | - Bernd Gruber
- Centre for Conservation Ecology and Genomics, Institute for Applied Ecology, University of Canberra, Bruce, ACT, 2617, Australia
| | - Stephen D Sarre
- Centre for Conservation Ecology and Genomics, Institute for Applied Ecology, University of Canberra, Bruce, ACT, 2617, Australia.
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Chabaud C, Berroneau M, Berroneau M, Dupoué A, Guillon M, Viton R, Gavira RSB, Clobert J, Lourdais O, Le Galliard JF. Climate aridity and habitat drive geographical variation in morphology and thermo-hydroregulation strategies of a widespread lizard species. Biol J Linn Soc Lond 2022. [DOI: 10.1093/biolinnean/blac114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
Thermo-hydroregulation strategies involve concurrent changes in functional traits related to energy, water balance and thermoregulation and play a key role in determining life-history traits and population demography of terrestrial ectotherms. Local thermal and hydric conditions should be important drivers of the geographical variation of thermo-hydroregulation strategies, but we lack studies that examine these changes across climatic gradients in different habitat types. Here, we investigated intraspecific variation of morphology and thermo-hydroregulation traits in the widespread European common lizard (Zootoca vivipara louislantzi) across a multidimensional environmental gradient involving independent variation in air temperature and rainfall and differences in habitat features (access to free-standing water and forest cover). We sampled adult males for morphology, resting metabolic rate, total and cutaneous evaporative water loss and thermal preferences in 15 populations from the rear to the leading edge of the distribution across an elevational gradient ranging from sea level to 1750 m. Besides a decrease in adult body size with increasing environmental temperatures, we found little effect of thermal conditions on thermo-hydroregulation strategies. In particular, relict lowland populations from the warm rear edge showed no specific ecophysiological adaptations. Instead, body mass, body condition and resting metabolic rate were positively associated with a rainfall gradient, while forest cover and water access in the habitat throughout the season also influenced cutaneous evaporative water loss. Our study emphasizes the importance of rainfall and habitat features rather than thermal conditions for geographical variation in lizard morphology and physiology.
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Affiliation(s)
- Chloé Chabaud
- Centre d’Etudes Biologiques de Chizé, Université La Rochelle, CNRS , UMR 7372, 405 Route de Prissé la Charrière, 79360 Villiers-en-Bois , France
- iEES Paris, Sorbonne Université, CNRS, UMR 7618, Faculté Sciences et Ingénierie , 4 place Jussieu, 75005 Paris , France
| | | | - Maud Berroneau
- Cistude Nature, Chemin du Moulinat , 33185 Le Haillan , France
| | - Andréaz Dupoué
- iEES Paris, Sorbonne Université, CNRS, UMR 7618, Faculté Sciences et Ingénierie , 4 place Jussieu, 75005 Paris , France
| | - Michaël Guillon
- Centre d’Etudes Biologiques de Chizé, Université La Rochelle, CNRS , UMR 7372, 405 Route de Prissé la Charrière, 79360 Villiers-en-Bois , France
- Cistude Nature, Chemin du Moulinat , 33185 Le Haillan , France
| | - Robin Viton
- Centre d’Etudes Biologiques de Chizé, Université La Rochelle, CNRS , UMR 7372, 405 Route de Prissé la Charrière, 79360 Villiers-en-Bois , France
| | - Rodrigo S B Gavira
- Centre d’Etudes Biologiques de Chizé, Université La Rochelle, CNRS , UMR 7372, 405 Route de Prissé la Charrière, 79360 Villiers-en-Bois , France
| | - Jean Clobert
- Station d’Ecologie Théorique et Expérimentale, CNRS , UMR 5321, Route du CNRS, Moulis , France
| | - Olivier Lourdais
- Centre d’Etudes Biologiques de Chizé, Université La Rochelle, CNRS , UMR 7372, 405 Route de Prissé la Charrière, 79360 Villiers-en-Bois , France
| | - Jean-François Le Galliard
- iEES Paris, Sorbonne Université, CNRS, UMR 7618, Faculté Sciences et Ingénierie , 4 place Jussieu, 75005 Paris , France
- École normale supérieure, PSL Research University, Département de biologie, CNRS, UMS 3194, Centre de recherche en écologie expérimentale et prédictive (CEREEP-Ecotron IleDeFrance) , 78 rue du château, 77140 Saint-Pierre-lès-Nemours , France
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5
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Chang J, Pan Y, Liu W, Xie Y, Hao W, Xu P, Wang Y. Acute temperature adaptation mechanisms in the native reptile species Eremias argus. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 818:151773. [PMID: 34808164 DOI: 10.1016/j.scitotenv.2021.151773] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 10/13/2021] [Accepted: 11/14/2021] [Indexed: 06/13/2023]
Abstract
Reptiles are sensitive to temperature changes as ectotherm animals. The climate warming may pose more serious threat to reptiles. Although the behavior effect and reproduction biology have been well studied, little information is available about the adaptation mechanisms of reptiles to temperature stress. In this study, the native Chinese species, Eremias argus were incubated at 15 (cold stress), 25 (control group) and 35 °C (thermal stress) for 24 h. The transcriptome and metabolome technology were applied to investigate the molecular regulation mechanisms of lizards to acute temperature changes. The CIRBP and HSPA8 were hub genes in response to temperature adaptation. The increased expression of PER gene in lizard circadian rhythm is associated with tyrosine metabolism after cold or thermal stress. The poly-unsaturated fatty acids in female lizard liver were significantly increased with up-regulation of FASN and ACACA genes after thermal stress, which proved the disruption of fatty acid biosynthesis pathway in corporation with the altered body weight. The cortisol and testosterone were important steroid hormones in response to temperature changes especially in male lizard liver. The increased CIRBP gene expression in lizard gonads suppressed the KDM6B gene, which regulates the testis development and may induce sex reversal in male lizard after thermal stress. The adaptation responses of lizards to temperature stress may threaten the health status of wild population.
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Affiliation(s)
- Jing Chang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing 100085, China.
| | - Yifan Pan
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing 100085, China; University of Chinese Academy of Sciences, Yuquan RD 19 a, Beijing 100049, China
| | - Wentao Liu
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing 100085, China; University of Chinese Academy of Sciences, Yuquan RD 19 a, Beijing 100049, China
| | - Yun Xie
- Institute of Food Safety, Chinese Academy of Inspection and Quarantine, Beijing 100176, China
| | - Weiyu Hao
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing 100085, China
| | - Peng Xu
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing 100085, China
| | - Yinghuan Wang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing 100085, China
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6
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Gómez Alés R, Acosta JC, Astudillo V, Córdoba M. Season-sex interaction induces changes in the ecophysiological traits of a lizard in a high altitude cold desert, Puna region. J Therm Biol 2022; 103:103152. [PMID: 35027202 DOI: 10.1016/j.jtherbio.2021.103152] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 11/11/2021] [Accepted: 11/30/2021] [Indexed: 10/19/2022]
Abstract
Functional traits are those characteristics of organisms that influence the ability of a species to develop in a habitat and persist in the face of environmental changes. The traits are often affected by a multiplicity of species-dependent and external factors. Our objective was to investigate thermal biology of Liolaemus ruibali in a high altitude cold desert at the arid Puna region, Argentina. We address the following question: do sex and seasonal variations in environmental temperature induce changes in the ecophysiological traits? We measured and compared the operative temperatures between fall and spring; and between sexes and seasons, we compared the ecophysiological traits of lizards, microenvironmental temperatures and thermoregulatory behavior. Air and operative temperatures were different between seasons. We found an effect of season-sex interaction on field body temperatures, preferred temperatures, panting threshold and thermal quality. The voluntary and critical temperatures presented seasonal variation in relation to changes in environmental temperatures, suggesting thermal acclimatization. We note behavioral changes between seasons, with the substrate being the main resource for gaining heat in spring. We conclude that Liolaemus ruibali is an efficient thermoregulator; it is a eurythermic lizard and presents phenotypic plasticity in different ecophysiological and behavioral traits induced by sex and seasonality. In addition, we predict that this population could buffer the effects of projected global warming scenarios.
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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
| | - Vanesa Astudillo
- 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
| | - Mariela Córdoba
- 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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CECCHETTO NICOLÁSR, MEDINA SUSANAM, BAUDINO FLORENCIA, IBARGÜENGOYTÍA NORAR. Wintertime tales: How the lizard Liolaemus lineomaculatus endures the temperate cold climate of Patagonia, Argentina. AN ACAD BRAS CIENC 2022; 94:e20210758. [DOI: 10.1590/0001-3765202220210758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 10/01/2021] [Indexed: 11/21/2022] Open
Affiliation(s)
| | - SUSANA M. MEDINA
- Consejo Nacional de Investigaciones Científicas y Técnicas (CIEMEP-CONICET), Argentina
| | - FLORENCIA BAUDINO
- Instituto de Investigaciones en Biodiversidad y Medioambiente, Argentina
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8
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Wu J. The risk of forfeiting the ranges of reptiles under nonrandom and stochastic scenarios of moving climate conditions: a case study for 115 species in China. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:51511-51529. [PMID: 33982261 DOI: 10.1007/s11356-021-14247-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Accepted: 04/29/2021] [Indexed: 06/12/2023]
Abstract
Revealing the hazard features of forfeiting areal ranges for nonidentical scenarios of shifting climatic conditions is pivotal for the conformation of reptiles to climatic warming. Taking 115 reptiles in China as an example, the indefiniteness and danger of shrinking geographical range for the reptiles under stochastic and nonrandom scenarios of moving climatic situations were inspected via exploiting the scenarios of shifting climatic status associated with the representative concentration pathways, Monte Carlo simulation, and the classifications scheme based on the fuzzy set. For non-stochastic states of altering climatic elements, the richness of 115 reptiles improved in certain sites of northeastern, and western China and dropped in several areas of northern, eastern, central China, and southeastern China: roughly 59-74 reptiles forfeiting less than 20% of their present ranges, roughly 25-34 reptiles narrowing less than 20-40% of their present areal ranges, and roughly 105-111 reptiles inhabited more than 80% of their overall areal ranges. For the random status of shifting climatic elements, the count of reptiles that forfeited the various extent of the present or entire areal ranges descended with raising the eventuality; with a possibility of over 0.6, the count of reptiles that minified less than 20%, 20-40%, 40-60%, 60-80% and over 80% of the present ranges was roughly 28-49, 5-10, 1-3, 0-1 and 13-18, separately; the count of reptiles that inhabited below 20%, 20-40%, 40-60%, 60-80% and more than 80% of the entire real ranges was roughly 0-1, 5-6, 1-5, 0-2 and 35-36, separately. About 30% of 115 reptiles would face disappearance danger in response to moving climate conditions in the absence of adaption steps, and the conformation measures were indispensable for the reptiles that shrunk their areas.
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Affiliation(s)
- Jianguo Wu
- The Institute of Environmental Ecology, Chinese Research Academy of Environmental Sciences, No 8, Da Yang Fang, Beiyuan, Anwai, Chaoyang District, Beijing, 100012, China.
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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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Pottier P, Burke S, Drobniak SM, Lagisz M, Nakagawa S. Sexual (in)equality? A meta‐analysis of sex differences in thermal acclimation capacity across ectotherms. Funct Ecol 2021. [DOI: 10.1111/1365-2435.13899] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Patrice Pottier
- Ecology & Evolution Research Centre School of Biological, Earth and Environmental Sciences The University of New South Wales Sydney NSW Australia
| | - Samantha Burke
- Ecology & Evolution Research Centre School of Biological, Earth and Environmental Sciences The University of New South Wales Sydney NSW Australia
| | - Szymon M. Drobniak
- Ecology & Evolution Research Centre School of Biological, Earth and Environmental Sciences The University of New South Wales Sydney NSW Australia
- Institute of Environmental Sciences Jagiellonian University Kraków Poland
| | - Malgorzata Lagisz
- Ecology & Evolution Research Centre School of Biological, Earth and Environmental Sciences The University of New South Wales Sydney NSW Australia
| | - Shinichi Nakagawa
- Ecology & Evolution Research Centre School of Biological, Earth and Environmental Sciences The University of New South Wales Sydney NSW Australia
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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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Latitudinal comparison of the thermal biology in the endemic lizard Liolaemus multimaculatus. J Therm Biol 2020; 88:102485. [DOI: 10.1016/j.jtherbio.2019.102485] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2019] [Revised: 12/05/2019] [Accepted: 12/19/2019] [Indexed: 12/19/2022]
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14
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Guerra-Correa ES, Merino-Viteri A, Andrango MB, Torres-Carvajal O. Thermal biology of two tropical lizards from the Ecuadorian Andes and their vulnerability to climate change. PLoS One 2020; 15:e0228043. [PMID: 31978205 PMCID: PMC6980609 DOI: 10.1371/journal.pone.0228043] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Accepted: 01/06/2020] [Indexed: 11/21/2022] Open
Abstract
This study aims to analyze the thermal biology and climatic vulnerability of two closely related lizard species (Stenocercus festae and S. guentheri) inhabiting the Ecuadorian Andes at high altitudes. Four physiological parameters—body temperature (Tb), preferred temperature (Tpref), critical thermal maximum (CTmax), and critical thermal minimum (CTmin)—were evaluated to analyze the variation of thermophysiological traits among these populations that inhabit different environmental and altitudinal conditions. We also evaluate the availability of operative temperatures, warming tolerance, and thermal safety margin of each population to estimate their possible risks in the face of future raising temperatures. Similar to previous studies, our results suggest that some physiological traits (CTmax and Tb) are influenced by environmental heterogeneity, which brings changes on the thermoregulatory behavior. Other parameters (Tpref and CTmin), may be also influenced by phylogenetic constraints. Moreover, the fluctuating air temperature (Tair) as well as the operative temperatures (Te) showed that these lizards exploit a variety of thermal microenvironments, which may facilitate behavioral thermoregulation. Warming tolerance and thermal safety margin analyses suggest that both species find thermal refugia and remain active without reducing their performance or undergoing thermal stress within their habitats. We suggest that studies on the thermal biology of tropical Andean lizards living at high altitudes are extremely important as these environments exhibit a unique diversity of microclimates, which consequently result on particular thermophysiological adaptations.
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Affiliation(s)
- Estefany S. Guerra-Correa
- Escuela de Ciencias Biológicas, Museo de Zoología, Pontificia Universidad Católica del Ecuador, Quito, Pichincha, Ecuador
- * E-mail:
| | - Andrés Merino-Viteri
- Escuela de Ciencias Biológicas, Museo de Zoología, Pontificia Universidad Católica del Ecuador, Quito, Pichincha, Ecuador
- Escuela de Ciencias Biológicas Laboratorio de Ecofisiología, Pontificia Universidad Católica del Ecuador, Quito, Pichincha, Ecuador
| | - María Belén Andrango
- Escuela de Ciencias Biológicas, Museo de Zoología, Pontificia Universidad Católica del Ecuador, Quito, Pichincha, Ecuador
| | - Omar Torres-Carvajal
- Escuela de Ciencias Biológicas, Museo de Zoología, Pontificia Universidad Católica del Ecuador, Quito, Pichincha, Ecuador
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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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16
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Mészáros B, Jordán L, Bajer K, Martín J, Török J, Molnár O. Relationship between oxidative stress and sexual coloration of lizards depends on thermal habitat. THE SCIENCE OF NATURE - NATURWISSENSCHAFTEN 2019; 106:55. [PMID: 31612286 DOI: 10.1007/s00114-019-1649-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 08/26/2019] [Accepted: 08/29/2019] [Indexed: 11/29/2022]
Abstract
Sexual signals serve as an honest indicator of individual quality, reflecting either developmental and/or maintenance costs. A possible underlying physiological mechanism is oxidative stress, which could mediate energy trade-offs between sexual signals and other quality traits. In ectotherms, thermal performance acts as a key indicator of individual quality and influence signal intensity. We investigated how oxidative state is reflected in visual signals of lizards from different thermal habitats. According to our hypothesis, efficient thermoregulation requires different strategies in different thermal environments. In a habitat with predictable temperature changes, animals are less exposed to suboptimal temperature ranges and selection will, therefore, be stronger on the maximum oxidative damage at optimal body temperature. Contrarily, in a habitat with rather stochastic thermal shifts, individuals are often constricted by suboptimal thermal conditions, and oxidative damage can be limiting on a wide temperature range. We used Iberolacerta cyreni and Psammodromus algirus inhabiting stochastic and predictable thermal environments respectively. We examined two aspects of oxidative stress: the level of reactive oxygen metabolites at the preferred temperature (maximal ROM) and the temperature range in which animals produce at least 80% of the maximum level of reactive oxygen metabolites (effective ROM range). In I. cyreni, we found that duller coloration was related to a wider effective ROM range, while expression of coloration in P. algirus was negatively correlated with the maximal ROM. Our results suggest that different thermal constraints affect different aspects of oxidative damage which can indicate individual quality and are, therefore, represented in sexual ornaments.
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Affiliation(s)
- Boglárka Mészáros
- Behavioural Ecology Group, Department of Systematic Zoology and Ecology, ELTE Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest, 1117, Hungary.
| | - Lilla Jordán
- Behavioural Ecology Group, Department of Systematic Zoology and Ecology, ELTE Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest, 1117, Hungary
| | - Katalin Bajer
- Behavioural Ecology Group, Department of Systematic Zoology and Ecology, ELTE Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest, 1117, Hungary
| | - José Martín
- Departamento de Ecología Evolutiva, Museo Nacional de Ciencias Naturales, CSIC, José Gutiérrez Abascal 2, 28006, Madrid, Spain
| | - János Török
- Behavioural Ecology Group, Department of Systematic Zoology and Ecology, ELTE Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest, 1117, Hungary.,Ecology Research Group of the Hungarian Academy of Sciences, Pázmány Péter sétány 1/C, Budapest, H-1117, Hungary
| | - Orsolya Molnár
- Behavioural Ecology Group, Department of Systematic Zoology and Ecology, ELTE Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest, 1117, Hungary
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17
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Diele-Viegas LM, Werneck FP, Rocha CFD. Climate change effects on population dynamics of three species of Amazonian lizards. Comp Biochem Physiol A Mol Integr Physiol 2019; 236:110530. [DOI: 10.1016/j.cbpa.2019.110530] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 06/28/2019] [Accepted: 07/10/2019] [Indexed: 11/29/2022]
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18
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Cabezas-Cartes F, Fernández JB, Duran F, Kubisch EL. Potential benefits from global warming to the thermal biology and locomotor performance of an endangered Patagonian lizard. PeerJ 2019; 7:e7437. [PMID: 31413930 PMCID: PMC6690334 DOI: 10.7717/peerj.7437] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Accepted: 07/08/2019] [Indexed: 11/28/2022] Open
Abstract
Global warming can significantly affect many aspects of the biology of animal species, including their thermal physiology and physiological performance. Thermal performance curves provide a heuristic model to evaluate the impacts of temperature on the ecophysiology of ectotherms. When integrated with other thermal biology parameters, they can be used to predict the impacts of climate change on individual fitness and population viability. In this study, we combine holistic measures of thermal physiology and the thermal sensitivity of locomotor performance with environmental temperatures measured at fine scale to estimate the vulnerability to global warming of the endangered Patagonian lizard Phymaturus tenebrosus. Our results indicate that this lizard exhibits its preferred temperatures and maximum locomotor performance at higher temperatures than the mean temperature it currently experiences in its habitat. In addition, it exhibits a low effectiveness of thermoregulation, being a poor thermoregulator. In view of the results obtained, we suggest that the climatic conditions of Patagonia may be advantageous for P. tenebrosus to survive future global warming, since its thermal physiology and locomotor performance may improve under increasing in environmental temperatures in its habitat.
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Affiliation(s)
- Facundo Cabezas-Cartes
- Laboratorio de Ecofisiología e Historia de vida de Reptiles, Instituto de Investigaciones en Biodiversidad y Medio Ambiente, Universidad Nacional del Comahue, CONICET, San Carlos de Bariloche, Río Negro, Argentina
| | - Jimena B Fernández
- Laboratorio de Ecofisiología e Historia de vida de Reptiles, Instituto de Investigaciones en Biodiversidad y Medio Ambiente, Universidad Nacional del Comahue, CONICET, San Carlos de Bariloche, Río Negro, Argentina
| | - Fernando Duran
- Laboratorio de Ecofisiología e Historia de vida de Reptiles, Instituto de Investigaciones en Biodiversidad y Medio Ambiente, Universidad Nacional del Comahue, CONICET, San Carlos de Bariloche, Río Negro, Argentina
| | - Erika L Kubisch
- Laboratorio de Ecofisiología e Historia de vida de Reptiles, Instituto de Investigaciones en Biodiversidad y Medio Ambiente, Universidad Nacional del Comahue, CONICET, San Carlos de Bariloche, Río Negro, Argentina
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19
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Gómez Alés R, Acosta JC, Astudillo V, Córdoba M, Blanco GM, Miles D. Effect of temperature on the locomotor performance of species in a lizard assemblage in the Puna region of Argentina. J Comp Physiol B 2018; 188:977-990. [PMID: 30288595 DOI: 10.1007/s00360-018-1185-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 09/13/2018] [Accepted: 09/21/2018] [Indexed: 10/28/2022]
Abstract
Locomotion is relevant to the ecology of reptiles because of its presumed influence on an organism's Darwinian fitness. Moreover, in ectothermic species, physiological performance capacity is affected by body temperature. We analyzed two components of locomotor performance in three species of lizards, Phymaturus extrilidus, Liolaemus parvus, and Liolaemus ruibali, in the Puna environment of Argentina. First, we estimated the thermal sensitivity of locomotion by measuring sprint speed at four different body temperatures. We included two measures of sprint speed: initial velocity and long sprint for sustained runs. Based on these data, we calculated the optimal temperature for performance and the optimal performance breadth. We also estimated endurance capacity at a single temperature. Maximum sprint speed for L. parvus was greater than L. ruibali and P. extrilidus in both initial velocity and long sprint. In contrast, L. parvus exhibited lower levels of endurance than L. ruibali and P. extrilidus. However, endurance in L. ruibali exceeded that of P. extrilidus. The species differed in the optimal temperature for the initial velocity with the lowest for L. ruibali (31.8 °C) followed by P. extrilidus (33.25 °C) and then L. parvus (36.25 °C). The optimal temperature for long sprint varied between 32 and 36 °C for all species. We found that all species attained maximum performance at body temperatures commonly experienced during daily activity, which was higher than the thermal quality of the environment. We found evidence for thermal sensitivity in locomotor performance in these species. However, we also show that the broad thermal breadth of performance suggests that the lizards are capable of sustaining near optimal levels of locomotor performance at ambient temperatures that would appear to be suboptimal. Thus, this lizard assemblage is capable of coping with the highly variable climatic conditions in the Puna region of Argentina.
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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.,CIGEOBIO-CONICET, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de San Juan, Av. Ignacio de la Roza 590 (O), Rivadavia, J5402DCS, San Juan, Argentina
| | - Vanesa Astudillo
- 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.,CIGEOBIO-CONICET, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de San Juan, Av. Ignacio de la Roza 590 (O), Rivadavia, J5402DCS, San Juan, Argentina
| | - Mariela Córdoba
- 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.,CIGEOBIO-CONICET, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de San Juan, Av. Ignacio de la Roza 590 (O), Rivadavia, J5402DCS, San Juan, Argentina
| | - Graciela Mirta Blanco
- 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.,CIGEOBIO-CONICET, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de San Juan, Av. Ignacio de la Roza 590 (O), Rivadavia, J5402DCS, San Juan, Argentina
| | - Donald Miles
- Department of Biological Sciences, and Ohio Center for Ecological and Evolutionary Studies, Ohio University, Athens, OH, 45701, USA
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Stellatelli OA, Villalba A, Block C, Vega LE, Dajil JE, Cruz FB. Seasonal shifts in the thermal biology of the lizard Liolaemus tandiliensis (Squamata, Liolaemidae). J Therm Biol 2018; 73:61-70. [DOI: 10.1016/j.jtherbio.2018.02.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 02/12/2018] [Accepted: 02/20/2018] [Indexed: 10/18/2022]
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21
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Stellatelli OA, Block C, Villalba A, Vega LE, Dajil JE, Cruz FB. Behavioral compensation buffers body temperatures of two Liolaemus lizards under contrasting environments from the temperate Pampas: a Bogert effect? ETHOL ECOL EVOL 2017. [DOI: 10.1080/03949370.2017.1388293] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Oscar A. Stellatelli
- Instituto de Investigaciones Marinas y Costeras (IIMyC), Universidad Nacional de Mar del Plata, CONICET, Facultad de Ciencias Exactas y Naturales, Deán Funes 3250, 7600 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, Deán Funes 3250, 7600 Mar del Plata, Argentina
| | - Agustina Villalba
- Laboratorio de Artrópodos, Centro de Investigación en Abejas Sociales (CIAS). Universidad Nacional de Mar del Plata, Facultad de Ciencias Exactas y Naturales, Deán Funes 3250, 7600 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, Deán Funes 3250, 7600 Mar del Plata, Argentina
| | - Juan E. Dajil
- Instituto de Investigaciones Marinas y Costeras (IIMyC), Universidad Nacional de Mar del Plata, CONICET, Facultad de Ciencias Exactas y Naturales, Deán Funes 3250, 7600 Mar del Plata, Argentina
| | - Félix B. Cruz
- Instituto de Investigaciones en Biodiversidad y Medioambiente (INIBIOMA), Universidad Nacional del Comahue, CONICET, Quintral 1250, 8400 San Carlos de Bariloche, Argentina
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López-Alcaide S, Nakamura M, Smith EN, Martínez-Meyer E. Would behavioral thermoregulation enable pregnant viviparous tropical lizards to cope with a warmer world? Integr Zool 2017; 12:379-395. [PMID: 28058803 DOI: 10.1111/1749-4877.12253] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Sceloporus lizards depend on external heat to achieve their preferred temperature (Tsel ) for performing physiological processes. Evidence both in the field and laboratory indicates that pregnant females of this Genus select body temperatures (Tb ) lower than 34 °C as higher temperatures may be lethal to embryos. Therefore, thermoregulation is crucial for successful embryo development. Given the increase in global air temperature, it is expected that the first compensatory response of species that inhabit tropical climates will be behavioral thermoregulation. We tested whether viviparous Sceloporus formosus group lizards in the wild exhibited differences in thermoregulatory behavior to achieve the known Tsel for developing embryos regardless of local thermal conditions. We quantified field active body temperature, thermoregulatory behavior mechanisms (time of sighting, microhabitat used and basking time) and available microhabitat thermal conditions (i.e. operative temperature) for 10 lizard species during gestation, distributed along an altitudinal gradient. We applied both conventional and phylogenic analyses to explore whether Tb or behavioral thermoregulation could be regulated in response to different thermal conditions. These species showed no significant differences in field Tb during gestation regardless of local thermal conditions. In contrast, they exhibited significant differences in their behavioral thermoregulation associated with local environmental conditions. Based on these observations, the differences in thermoregulatory behavior identified are interpreted as compensatory adjustments to local thermal conditions. We conclude that these species may deal with higher temperatures predicted for the tropics by modulating their thermoregulatory behavior.
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Affiliation(s)
- Saúl López-Alcaide
- Departament of Zoology, Institute of Biology, National Autonomous University of Mexico, Mexico City, Mexico
| | | | - Eric N Smith
- Amphibian and Reptile Diversity Research Center and Department of Biology, University of Texas at Arlington, Arlington, Texas, USA
| | - Enrique Martínez-Meyer
- Departament of Zoology, Institute of Biology, National Autonomous University of Mexico, Mexico City, Mexico
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Geographic variation and acclimation effects on thermoregulation behavior in the widespread lizard Liolaemus pictus. J Therm Biol 2016; 63:78-87. [PMID: 28010818 DOI: 10.1016/j.jtherbio.2016.11.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 10/19/2016] [Accepted: 11/02/2016] [Indexed: 11/21/2022]
Abstract
Populations at the warm range margins of the species distribution may be at the greatest risks of extinction from global warming unless they can tolerate extreme environmental conditions. Yet, some studies suggest that the thermal behavior of some lizard species is evolutionarily rigid. During two successive years, we compared the thermal biology of two populations of Liolaemus pictus living at the northern (warmer) and one population living at the southern (colder) range limits, thus spanning an 800km latitudinal distance. Populations at the two range margins belong to two deeply divergent evolutionary clades. We quantified field body temperatures (Tb), laboratory preferred body temperatures (PBT), and used operative temperature data (Te) to calculate the effectiveness of thermoregulation (E). During one year in all populations, we further exposed half of the lizards to a cold or a hot acclimation treatment to test for plasticity in the thermal behavior. The environment at the southern range limit was characterized by cooler weather and lower Te. Despite that, females had higher Tb and both males and females had higher PBT in the southernmost population (or clade) than in the northernmost populations. Acclimation to cold conditions led to higher PBT in all populations suggesting that plastic responses to thermal conditions, instead of evolutionary history, may contribute to geographic variation. Lizards regulated moderately well their body temperature (E≈0.7): they avoided warm microhabitats in the northern range but capitalized on warm microhabitats in the southern range. We review literature data to show that Liolaemus species increase their thermoregulation efficiency in thermally challenging environments. Altogether, this indicates that habitats of low thermal quality generally select against thermoconformity in these lizards.
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Belasen A, Brock K, Li B, Chremou D, Valakos E, Pafilis P, Sinervo B, Foufopoulos J. Fine with heat, problems with water: microclimate alters water loss in a thermally adapted insular lizard. OIKOS 2016. [DOI: 10.1111/oik.03712] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Anat Belasen
- Dept of Ecology and Evolutionary Biology; Univ. of Michigan; Ann Arbor MI USA
- School of Natural Resources and Environment; Univ. of Michigan; Ann Arbor MI USA
| | - Kinsey Brock
- School of Natural Resources and Environment; Univ. of Michigan; Ann Arbor MI USA
| | - Binbin Li
- School of Natural Resources and Environment; Univ. of Michigan; Ann Arbor MI USA
- Nicholas School of Environment; Duke Univ.; Durham NC USA
| | | | - Efstratios Valakos
- Dept of Animal and Human Physiology; National and Kapodistrian Univ. of Athens; Athens Greece
| | - Panayiotis Pafilis
- Dept of Zoology and Marine Biology; National and Kapodistrian Univ. of Athens; Athens Greece
| | - Barry Sinervo
- Dept of Ecology and Evolutionary Biology; Univ. of California; Santa Cruz CA USA
| | - Johannes Foufopoulos
- School of Natural Resources and Environment; Univ. of Michigan; Ann Arbor MI USA
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Simoniello P, Esposito MG, Trinchella F, Motta CM, Scudiero R. Alterations in brain morphology and HSP70 expression in lizard embryos exposed to thermal stress. C R Biol 2016; 339:380-90. [DOI: 10.1016/j.crvi.2016.07.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 06/30/2016] [Accepted: 07/13/2016] [Indexed: 12/25/2022]
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Bozinovic F, Medina NR, Alruiz JM, Cavieres G, Sabat P. Thermal tolerance and survival responses to scenarios of experimental climatic change: changing thermal variability reduces the heat and cold tolerance in a fly. J Comp Physiol B 2016; 186:581-7. [DOI: 10.1007/s00360-016-0980-6] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Revised: 03/02/2016] [Accepted: 03/12/2016] [Indexed: 12/31/2022]
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