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High‐elevation hypoxia impacts perinatal physiology and performance in a potential montane colonizer
Author(s) -
SOUCHET Jérémie,
GANGLOFF Eric J.,
MICHELI Gaëlle,
BOSSU Coralie,
TROCHET Audrey,
BERTRAND Romain,
CLOBERT Jean,
CALVEZ Olivier,
MARTINEZSILVESTRE Albert,
DARNET Elodie,
LE CHEVALIER Hugo,
GUILLAUME Olivier,
MOSSOLLTORRES Marc,
BARTHE Laurent,
POTTIER Gilles,
PHILIPPE Hervé,
AUBRET Fabien
Publication year - 2020
Publication title -
integrative zoology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.904
H-Index - 34
ISSN - 1749-4877
DOI - 10.1111/1749-4877.12468
Subject(s) - oviparity , ectotherm , biology , hatchling , hatching , ecology , elevation (ballistics) , hypoxia (environmental) , incubation , extreme environment , reproductive success , zoology , oxygen , population , demography , chemistry , biochemistry , geometry , mathematics , organic chemistry , sociology , bacteria , genetics
Climate change is generating range shifts in many organisms, notably along the elevational gradient in mountainous environments. However, moving up in elevation exposes organisms to lower oxygen availability, which may reduce the successful reproduction and development of oviparous organisms. To test this possibility in an upward‐colonizing species, we artificially incubated developing embryos of the viperine snake ( Natrix maura ) using a split‐clutch design, in conditions of extreme high elevation (hypoxia at 2877 m above sea level; 72% sea‐level equivalent O 2 availability) or low elevation (control group; i.e. normoxia at 436 m above sea level). Hatching success did not differ between the two treatments. Embryos developing at extreme high elevation had higher heart rates and hatched earlier, resulting in hatchlings that were smaller in body size and slower swimmers compared to their siblings incubated at lower elevation. Furthermore, post‐hatching reciprocal transplant of juveniles showed that snakes which developed at extreme high elevation, when transferred back to low elevation, did not recover full performance compared to their siblings from the low elevation incubation treatment. These results suggest that incubation at extreme high elevation, including the effects of hypoxia, will not prevent oviparous ectotherms from producing viable young, but may pose significant physiological challenges on developing offspring in ovo . These early‐life performance limitations imposed by extreme high elevation could have negative consequences on adult phenotypes, including on fitness‐related traits.