Degrees of change: between and within population variation in thermal reaction norms of phenology in a viviparous lizard.

Ecology
George D CunninghamErik Wapstra

Abstract

As the earth warms, populations will be faced with novel environments to which they may not be adapted. In the short term, populations can be buffered against the negative effects, or maximize the beneficial effects, of such environmental change via phenotypic plasticity and, in the longer term, via adaptive evolution. However, the extent and direction of these population-level responses will be dependent on the degree to which responses vary among the individuals within them (i.e., within population variation in plasticity), which is, itself, likely to vary among populations. Despite this, we have estimates of among-individual variation in plastic responses across multiple populations for only a few systems. This lack of data limits our ability to predict the consequences of environmental change for population and species persistence accurately. Here, we utilized a 16-yr data set from climatically distinct populations of the viviparous skink Niveoscincus ocellatus tracking over 1,200 litters from more than 600 females from each population to examine inter- and intrapopulation variability in the response of parturition date to environmental temperature. We found that these populations share a common population-mean reaction nor...Continue Reading

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Citations

May 27, 2021·Proceedings. Biological Sciences·L J FitzpatrickE Wapstra
Aug 28, 2021·Molecular Ecology·Christopher R FriesenMats Olsson

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