TABLE 1.
Effect of temperature and precipitation on demographic parameters in eight populations of Rana luteiventris. Likelihood ratio tests were used to assess the influence of mean and temporal variance (SD) of temperature (calculated for the period 1990–2019) and precipitation on ageing rate, life span 80%, annual adult survival (mean μ and temporal variance σ), annual seniority (μ and σ) and annual population growth rate (μ and σ). Recruitment is approximated as 1 − seniority. R 2 values were calculated from the linear model. Relationships for which likelihood ratio test had a p‐value lower than 0.05 are shown in bold
| Parameter | df | χ 2 | p‐value | R 2 |
|---|---|---|---|---|
| Mean annual temperature | ||||
| Ageing rate | 1 | 10.13 | 0.001 | 0.73 |
| Life span 80% | 1 | 5.32 | 0.02 | 0.49 |
| Survival (μ) | 1 | 8.18 | 0.004 | 0.60 |
| Seniority (μ) | 1 | 7.69 | 0.005 | 0.58 |
| Population growth (μ) | 1 | 0.17 | 0.68 | 0.02 |
| Mean annual cumulative precipitation | ||||
| Ageing rate | 1 | 3.05 | 0.08 | 0.31 |
| Life span 80% | 1 | 0.88 | 0.35 | 0.10 |
| Survival (μ) | 1 | 2.15 | 0.14 | 0.21 |
| Seniority (μ) | 1 | 2.14 | 0.14 | 0.21 |
| Population growth (μ) | 1 | 0.15 | 0.69 | 0.02 |
| Standard deviation of annual temperature | ||||
| Survival (σ) | 1 | 0.008 | 0.93 | 0.05 |
| Seniority (σ) | 1 | 0.31 | 0.57 | 0.03 |
| Population growth (σ) | 1 | 0.26 | 0.61 | 0.03 |
| Standard deviation of n annual cumulative precipitation | ||||
| Survival (σ) | 1 | 0.47 | 0.49 | 0.05 |
| Seniority (σ) | 1 | 0.05 | 0.82 | 0.001 |
| Population growth (σ) | 1 | 1.97 | 0.16 | 0.19 |