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Data from: Effects of hypoxia on the thermal physiology of a high-elevation lizard: Implications for upslope-shifting species

Citation

Jiang, Zhong wen; Ma, Liang; Mi, Chun rong; Du, Wei guo (2021), Data from: Effects of hypoxia on the thermal physiology of a high-elevation lizard: Implications for upslope-shifting species, Dryad, Dataset, https://doi.org/10.5061/dryad.79cnp5htt

Abstract

Montane reptiles are predicted to move to higher elevations in response to climate warming. However, whether upwards-shifting reptiles will be physiologically constrained by hypoxia at higher elevations remains unknown. We investigated the effects of hypoxic conditions on preferred body temperatures (Tpref) and thermal tolerance capacity of a montane lizard (Phrynocephalus vlangalii) from two populations on the Qinghai-Tibet Plateau. Lizards from 2600 m asl were exposed to O2 levels mimicking those at 2600 m (control) and 3600 m (hypoxia treatment). Lizards from 3600 m asl were exposed to O2 levels mimicking those at 3600 m (control) and 4600 m (hypoxia treatment). The Tpref did not differ between the control and hypoxia treatments in lizards from 2600 m. However, lizards from 3600 m selected lower body temperatures when exposed to the hypoxia treatment mimicking the O2 level at 4600 m. Additionally, the hypoxia treatment induced lower critical thermal minimum (CTmin) in lizards from both populations, but did not affect critical thermal maximum (CTmax) in either population. Our results imply that upwards-shifting reptiles may be constrained by hypoxia if a decrease in Tpref reduces thermally-dependent fitness traits, despite no observed effect on their heat tolerance.

Funding

Chinese Academy of Sciences, Award: XDB31000000: Strategic Priority Research Program

The Second Tibetan Plateau Scientific Expedition and Research Program (STEP), Award: 2019QZKK0501

The Joint Research Program of Sanjiangyuan National Park, Award: LHZX-2020-01-02

National Natural Science Foundation of China, Award: 31801987

Chinese Academy of Sciences, Award: XDA20050201: Strategic Priority Research Program

The Second Tibetan Plateau Scientific Expedition and Research Program (STEP), Award: 2019QZKK0501

The Joint Research Program of Sanjiangyuan National Park, Award: LHZX-2020-01-02