Heightened among‐individual variation in life history but not morphology is related to developmental temperature in reptiles
Autor: | Alistair M. Senior, Lisa E. Schwanz, Daniel W. A. Noble, Tobias Uller |
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Rok vydání: | 2021 |
Předmět: |
0106 biological sciences
0303 health sciences Phenotypic plasticity Hot Temperature Temperature Reptiles Biology Adaptation Physiological 010603 evolutionary biology 01 natural sciences 03 medical and health sciences Phenotype Variation (linguistics) Evolutionary biology Trait Animals Stabilizing selection Incubation Extreme Cold Hatchling Ecology Evolution Behavior and Systematics 030304 developmental biology Local adaptation |
Zdroj: | Journal of Evolutionary Biology. 34:1793-1802 |
ISSN: | 1420-9101 1010-061X |
DOI: | 10.1111/jeb.13938 |
Popis: | Increases in phenotypic variation under extreme (e.g. novel or stressful) environmental conditions are emerging as a crucial process through which evolutionary adaptation can occur. Lack of prior stabilizing selection, as well as potential instability of developmental processes in these environments, may lead to a release of phenotypic variation that can have important evolutionary consequences. Although such patterns have been shown in model study organisms, we know little about the generality of trait variance across environments for non-model organisms. Here, we test whether extreme developmental temperatures increase the phenotypic variation across diverse reptile taxa. We find that the among-individual variation in a key life-history trait (post-hatching growth) increases at extreme cold and hot temperatures. However, variations in two measures of hatchling morphology and in hatchling performance were not related to developmental temperature. Although extreme developmental temperatures may increase the variation in growth, our results suggest that plastic responses to stressful incubation conditions do not generally make more extreme phenotypes available to selection. We discuss the reasons for the general lack of increased variability at extreme incubation temperatures and the implications this has for local adaptation in hatchling morphology and physiology. |
Databáze: | OpenAIRE |
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