首页|Latitudinal pattern of the thermal sensitivity of running speed in the endemic lizard Liolaemus multimaculatus

Latitudinal pattern of the thermal sensitivity of running speed in the endemic lizard Liolaemus multimaculatus

扫码查看
原文链接
  • NSTL
  • Wiley
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℃ 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℃ 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℃ 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.

latitudeLiolaemusreptilerunning speedtemperaturethermal sensitivity

Oscar Aníbal STELLATELLI、Laura E. VEGA、Carolina BLOCK、Camila ROCCA、Patricio BELLAGAMBA、Juan Esteban DAJIL、Félix Benjamín CRUZ

展开 >

Instituto de Investigaciones Marinas y Costeras (IIMyC), Universidad Nacional de Mar del Plata-CONICET, Facultad de Ciencias Exactas y Naturales, Mar del Plata, Argentina

Municipalidad de General Pueyrredón, Mar del Plata, Argentina

Instituto de Investigaciones en Biodiversidad y Medioambiente (INIBIOMA), Universidad Nacional del Comahue - CONICET, San Carlos de Bariloche, Argentina

2022

10.1111/1749-4877.12579

Integrative zoology

Integrative zoology

ISSN：1749-4869
年,卷(期)：2022.17(4)
  • 4
  • 111