Linking critical thermal maximum to mortality from thermal stress in a cold-water frog
Linking critical thermal maximum to mortality from thermal stress in a cold-water frog
复制标题
将冷水蛙的临界热最大值与热应激死亡率联系起来
DOI:
10.1098/rsbl.2023.0106
复制
发表时间:
2023
期刊:
影响因子:
3.3
通讯作者:
Funk, W. Chris
中科院分区:
文献类型:
--
作者:
Cicchino, Amanda S.;Ghalambor, Cameron K.;Funk, W. Chris
Estimates of organismal thermal tolerance are frequently used to assess physiological risk from warming, yet the assumption that these estimates are predictive of mortality has been called into question. We tested this assumption in the cold-water-specialist frog,Ascaphus montanus. For seven populations, we used dynamic experimental assays to measure tadpole critical thermal maximum (CTmax) and measured mortality from chronic thermal stress for 3 days at different temperatures. We tested the relationship between previously estimated population CTmax and observed mortality, as well as the strength of CTmax as a predictor of mortality compared to local stream temperatures capturing varying timescales. Populations with higher CTmax experienced significantly less mortality in the warmest temperature treatment (25°C). We also found that population CTmax outperformed stream temperature metrics as the top predictor of observed mortality. These results demonstrate a clear link between CTmax and mortality from thermal stress, contributing evidence that CTmax is a relevant metric for physiological vulnerability assessments.
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