Rodionov regime shift analysis of pond occupancy for the chorus frog*.

*Regime shift analysis for pond occupancy (0.05 level, expected regime length of 4 years). RSI is the regime shift index [44], and mean and length are mean number of ponds occupied in a regime and the length of the regime. If a regime shift is detected at a pre-determined α-level and expected regime cut-off length, mean values of the old and new regimes differ statistically at least at the given level (actual significance level is calculated for shifts with a number of preceding and following years, e.g., 2000–2001 occupancy boundary differed at the 1.4E-08 level, [44], [45]).