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Seasonal and altitudinal variation in dorsal skin reflectance and thermic rates in a high-altitude montane lizard.

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Title: Seasonal and altitudinal variation in dorsal skin reflectance and thermic rates in a high-altitude montane lizard.
Authors: González-Morales, J. Carlos1 (AUTHOR) juan.gonmor@gmail.com, Rivera-Rea, Jimena2 (AUTHOR), Moreno-Rueda, Gregorio3 (AUTHOR), Plasman, Melissa4 (AUTHOR), Quintana, Erendira1 (AUTHOR), Bastiaans, Elizabeth5 (AUTHOR)
Source: International Journal of Biometeorology. Jul2024, Vol. 68 Issue 7, p1421-1435. 15p.
Subject Terms: *Reflectance, *Lizard populations, *Lizards, *Body temperature, *Spring
Abstract: Temperature is one of the most important factors in the life histories of ectotherms, as body temperature has an undeniable effect on growth, activity, and reproduction. Lizards have a wide variety of strategies to acquire and maintain body temperature in an optimal range. The "Thermal Melanism Hypothesis" proposes that individuals with lower skin reflectance can heat up faster as a result of absorbing more solar radiation compared to lighter conspecifics. Therefore, having a darker coloration might be advantageous in cold habitats. Dorsal skin reflectance has been found to change rapidly with body temperature in several lizard species, and it can also vary over longer, seasonal time scales. These variations may be important in thermoregulation, especially in lizards that inhabit areas with a large temperature variation during the year. Here, we study how dorsal reflectance fluctuates with body temperature and varies among seasons. We compared dorsal skin reflectance at three body temperature treatments, and measured thermal rates (i.e., heat and cool rate, thermic lapse, and net heat gain) by elevation (2500–4100 m) and seasons (spring, summer, and autumn) in the mesquite lizard, Sceloporus grammicus. Our results show that lizards were darker at high elevations and during the months with the lowest environmental temperatures. The rate of obtaining and retaining heat also varied during the year and was highest during the reproductive season. Our results indicate that the variation of dorsal skin reflectance and thermal rates follows a complex pattern in lizard populations and is affected by both elevation and season. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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An: 178655804
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  Label: Title
  Group: Ti
  Data: Seasonal and altitudinal variation in dorsal skin reflectance and thermic rates in a high-altitude montane lizard.
– Name: Author
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  Data: <searchLink fieldCode="AR" term="%22González-Morales%2C+J%2E+Carlos%22">González-Morales, J. Carlos</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> juan.gonmor@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Rivera-Rea%2C+Jimena%22">Rivera-Rea, Jimena</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Moreno-Rueda%2C+Gregorio%22">Moreno-Rueda, Gregorio</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Plasman%2C+Melissa%22">Plasman, Melissa</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Quintana%2C+Erendira%22">Quintana, Erendira</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bastiaans%2C+Elizabeth%22">Bastiaans, Elizabeth</searchLink><relatesTo>5</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Biometeorology%22">International Journal of Biometeorology</searchLink>. Jul2024, Vol. 68 Issue 7, p1421-1435. 15p.
– Name: Subject
  Label: Subject Terms
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  Data: *<searchLink fieldCode="DE" term="%22Reflectance%22">Reflectance</searchLink><br />*<searchLink fieldCode="DE" term="%22Lizard+populations%22">Lizard populations</searchLink><br />*<searchLink fieldCode="DE" term="%22Lizards%22">Lizards</searchLink><br />*<searchLink fieldCode="DE" term="%22Body+temperature%22">Body temperature</searchLink><br />*<searchLink fieldCode="DE" term="%22Spring%22">Spring</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Temperature is one of the most important factors in the life histories of ectotherms, as body temperature has an undeniable effect on growth, activity, and reproduction. Lizards have a wide variety of strategies to acquire and maintain body temperature in an optimal range. The "Thermal Melanism Hypothesis" proposes that individuals with lower skin reflectance can heat up faster as a result of absorbing more solar radiation compared to lighter conspecifics. Therefore, having a darker coloration might be advantageous in cold habitats. Dorsal skin reflectance has been found to change rapidly with body temperature in several lizard species, and it can also vary over longer, seasonal time scales. These variations may be important in thermoregulation, especially in lizards that inhabit areas with a large temperature variation during the year. Here, we study how dorsal reflectance fluctuates with body temperature and varies among seasons. We compared dorsal skin reflectance at three body temperature treatments, and measured thermal rates (i.e., heat and cool rate, thermic lapse, and net heat gain) by elevation (2500–4100 m) and seasons (spring, summer, and autumn) in the mesquite lizard, Sceloporus grammicus. Our results show that lizards were darker at high elevations and during the months with the lowest environmental temperatures. The rate of obtaining and retaining heat also varied during the year and was highest during the reproductive season. Our results indicate that the variation of dorsal skin reflectance and thermal rates follows a complex pattern in lizard populations and is affected by both elevation and season. [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1007/s00484-024-02677-7
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 15
        StartPage: 1421
    Subjects:
      – SubjectFull: Reflectance
        Type: general
      – SubjectFull: Lizard populations
        Type: general
      – SubjectFull: Lizards
        Type: general
      – SubjectFull: Body temperature
        Type: general
      – SubjectFull: Spring
        Type: general
    Titles:
      – TitleFull: Seasonal and altitudinal variation in dorsal skin reflectance and thermic rates in a high-altitude montane lizard.
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            NameFull: González-Morales, J. Carlos
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            NameFull: Rivera-Rea, Jimena
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            NameFull: Moreno-Rueda, Gregorio
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            NameFull: Plasman, Melissa
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            NameFull: Quintana, Erendira
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            NameFull: Bastiaans, Elizabeth
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          Dates:
            – D: 01
              M: 07
              Text: Jul2024
              Type: published
              Y: 2024
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              Value: 00207128
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              Value: 68
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              Value: 7
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            – TitleFull: International Journal of Biometeorology
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