| Autor: |
Dinsmore, Carli, Bronikowski, Anne, Sparkman, Amanda M., Muñoz, David, Davis, Courtney L., Avery, Julian, Arnold, Stevan J., Miller, David A. W. |
| Rok vydání: |
2023 |
| DOI: |
10.5281/zenodo.8169421 |
| Popis: |
Resource availability, acquisition and assimilation drive trade-offs and shape life-history strategies within individuals and across populations. We investigate the relationship between demographic parameters and the environment for montane populations of Common Garter Snakes (Thamnophis sirtalis) using a 16-year mark-recapture data set. We quantified patterns in survival, reproduction, and growth and how they varied between sexes, among populations, and in response to annual variability in resource conditions. We found that reproductive output increased in years with higher precipitation when prey availability was greater. In contrast, survival varied among populations and between males and females but not with respect to annual differences in environmental conditions. We found an interaction between early-life resource conditions and sensitivity to environments in later life. Growth was accelerated in years of higher prey availability for individuals that experienced poor prey conditions in their first year of life. Overall, our findings reveal spatio-temporal variation in growth and reproduction that are consistent with fluctuations in local resources and are complimented by trait plasticity in populations of a sympatric garter snake. Our results provide important insights regarding demography of ectothermic vertebrates with indeterminate growth and elucidate the influence of annual variation in prey abundance on survival, reproduction and growth and the effect of early-life conditions. Importantly, our results suggest that efforts to predict how populations will respond to fluctuating environments should incorporate early-life environment to account for context-dependent variation in demographic processes. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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