Adaptive seasonal shifts in the thermal preferences of the lizard Iberolacerta galani (Squamata, Lacertidae)

Ortega, Zaida; Mencía, Abraham; Pérez-Mellado, Valentı́n

doi:10.1016/j.jtherbio.2016.10.005

Cited by 15 publications

(7 citation statements)

References 37 publications

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“…There are two ways for lizards to cope with seasonal environmental variation: (1) behavioural thermoregulation and (2) physiological thermal acclimatisation of preferred body temperatures (Little and Seebacher 2016) and a mix of both strategies would also be possible. Some lacertids change their preferred temperature range to adapt to seasonal thermal requirements, as is the case for Iberolacerta galani (Ortega et al 2016c). Nevertheless, it seems not to be the case for P. lilfordi, whose preferred temperature range is similar during spring and summer.…”

Section: Discussionmentioning

confidence: 99%

Broad seasonal changes in thermoregulation of Podarcis lilfordi (Squamata, Lacertidae) at Binicodrell islet (Menorca, Spain)

Ortega¹,

Mencía²,

Giroux³

et al. 2019

Herpetozoa

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Most lizards maintain quite constant body temperatures by behavioural means. Seasonal variations of environmental factors, such as temperature, sunlight exposure and wind intensity, influence lizard thermoregulatory abilities. Understanding how seasonal environmental shifts influence lizards’ thermoregulation helps us to know how they deal behaviourally with environmental changes, in general. We examined seasonal shifts (spring vs. summer) in behavioural thermoregulation in Podarcislilfordi from Binicodrell islet (Menorca, Spain). Operative temperatures varied between microhabitats and seasons, being lower in spring than in summer, regardless of sunlight exposure. Lizard body temperatures were also lower in spring than in summer. Lizards used sunny microhabitats more frequently in spring and shaded areas in summer. Habitat thermal quality was similar during both seasons, but lizards thermoregulated less accurately in spring than in summer. Thermoregulatory effectiveness was low in spring (0.28) and moderate in summer (0.76). In comparison with previously published results, our findings showed the marked seasonal variation in the effectiveness of thermoregulation amongst island populations, which should be considered in future comparative studies.

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Section: Discussionmentioning

confidence: 99%

Broad seasonal changes in thermoregulation of Podarcis lilfordi (Squamata, Lacertidae) at Binicodrell islet (Menorca, Spain)

Ortega¹,

Mencía²,

Giroux³

et al. 2019

Herpetozoa

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“…a) La primera, propuesta por Adolph y Porter (1993), establece que los rasgos térmicos pueden ser adaptativos al ambiente, es decir, que se pueden modificar por efecto de la estacionalidad, latitud y altitud. La temperatura de selección o la temperatura elegida por los animales en condiciones de laboratorio es alta en primavera y baja en verano con la finalidad de minimizar los costos de termorregulación (Ortega et al, 2016), es el caso de la lagartija Iberalocerta galani. b) La segunda menciona que la biología térmica es conservativa, es decir, que no se modifica por efecto de la estación, latitud y altitud, por lo que ajustes conductuales son suficientes para mitigar los cambios ambientales (Crowley, 1985); por ejemplo, organismos de Sceloporus undulatus muestran temperaturas de selección similares en dos poblaciones de diferente altitud (Crowley, 1985).…”

Section: Hipoxia Y Lacertiliosunclassified

Calentamiento global y la fisiología de ectotermos: El caso de tres lacertilios mexicanos

Fajardo¹,

Burguete²,

González-Morales³

2020

Cienc. ergo sum

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Los hallazgos recientes muestran que el calentamiento global puede causar la extinción y el cambio en la distribución espacial de diversas especies de reptiles. Se ha propuesto, que en respuesta, los lacertilios podrían migrar en un gradiente altitudinal, pero no se considera a la hipóxia (escasez de oxígeno) como un factor que podría limitar la migración. Aquí discutimos las posibles adecuaciones en ciertas características morfo-fisiológicas que podrían permitir a los ectotermos migrar sobre un gradiente altitudinal aún con los efectos negativos de la hipóxia. Con esto podemos comenzar a estudiar a profundidad la vulnerabilidad de los ectotermos ante el calentamiento global que depende no solo de su biología térmica, sino también de su fisiología.

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“…1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 The first meta-partition revealed that season was the main trait affecting the differences between body and air temperatures, where lizard body temperatures are closer to air temperatures in summer compared to the other seasons. Some published studies have addressed the effect of seasonal changes on lacertid thermal ecology (Díaz & Cabezas-Díaz 2004;Díaz et al 2006;Ortega et al 2014;Ortega & Pérez-Mellado 2016), and some have detected seasonal differences between preferred temperatures (Díaz et al 2006;Ortega et al 2016b). Among lizards studied in the summer, altitude was the most important variable explaining differences between body and air temperatures, with a general trend for a greater increase of body temperatures above air temperatures in populations inhabiting high elevations (above 1000 m above sea level).…”

Section: Figurementioning

confidence: 99%

Main factors affecting lacertid lizard thermal ecology

Ortega

Martín-Vallejo

2019

Integrative Zoology

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The thermal ecology of ectotherms has been studied for almost 2 centuries, but additional attention is currently being paid to it, to understand how organisms deal with the environment in a climate change context. A consensus is still far away due to the large number of factors involved and their complex interactions. In this context, 3 analyses in lacertid lizards were carried out: (i) a meta-analysis, to test for differences between body and air temperatures from 71 populations; (ii) a meta-analysis concerning correlations between body and air temperatures from 60 populations; and (iii) a multimodel inference of thermoregulation effectiveness indices from 45 populations. The importance of different factors, including body size, habitat, insularity, altitude, climate and season, was evaluated in all analyses to model the response variables. A strong seasonality effect was observed, with a consistent pattern of less effective thermoregulation in summer compared to other seasons. Altitude was the second most important factor, with a consistent higher thermoregulation effort in populations occurring at high elevations (>1000 m above sea level). Other factors, such as insularity or body size, can also be important, but did not exhibit a clear pattern. Finally, thermoregulation was less affected by climate and habitat type.

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Adaptive seasonal shifts in the thermal preferences of the lizard Iberolacerta galani (Squamata, Lacertidae)

Cited by 15 publications

References 37 publications

Broad seasonal changes in thermoregulation of Podarcis lilfordi (Squamata, Lacertidae) at Binicodrell islet (Menorca, Spain)

Broad seasonal changes in thermoregulation of Podarcis lilfordi (Squamata, Lacertidae) at Binicodrell islet (Menorca, Spain)

Calentamiento global y la fisiología de ectotermos: El caso de tres lacertilios mexicanos

Main factors affecting lacertid lizard thermal ecology

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