## 3 Results
### Inter-Slope and Inter-Altitude Variability  
At the Peyreget site (Figure 2), the effect of slope was significant for half of the tests (Figure 3). At high altitude, the HaDaily pseudo-median was higher in the north than in the south in 2017 and 2019. At low altitude, the opposite was observed in 2017. The pseudo-medians of the differences ranged from 1.25 to 1.83 h, which corresponded to about one-third of the HaDaily\({}_{\rm ref}\) of 4.5 h (Table 3).  
The effect of altitude was significant on two-thirds of the tests (Figure 3). On the north slope, the HaDaily pseudo-median was higher at high altitude than at low altitude in 2017 and 2019; this result was also observed on the south slope in 2018. In 2017, on the south slope, the reverse trend was observed. The pseudo-medians of the differences ranged from 0.75 to 1.67 h, which corresponded to 17-37% of the HaDaily\({}_{\rm ref}\) of 4.5 h (Table 3).  
The persistence indices reflected these many disparities, ranging from 0.750 on NL in 2017 to 1.304 on NH in 2019. For five of the seven presented comparisons, only one of the two persistence indices was greater than 1 (NH vs. SH in 2017, NL vs. SL in 2017, NH vs. NL in 2017, SH vs. SL in 2017 and 2018), which also indicated a significant difference in the persistence probability. Finally,  
\begin{table}
\begin{tabular}{l l l l} \hline \hline  & **2017** & **2018** & **2019** \\ \hline NH & Pl \(\geq\) 1 \(\rightarrow\) HaSM = 29.25 h & Pl \(\geq\) 1 \(\rightarrow\) HaSM = 11.25 h & Pl \(\geq\) 1 \(\rightarrow\) HaSM = 68.40 h \\ \hline SH & Pl \(<\)1 \(\rightarrow\) extP = 0.125 & Pl \(\geq\) 1 \(\rightarrow\) HaSM = 34.65 h & Pl \(\geq\) 1 \(\rightarrow\) HaSM = 7.20 h \\ \hline NB & Pl \(<\)1 \(\rightarrow\) extP = 0.250 & Pl \(\geq\) 1 \(\rightarrow\) HaSM = 10.58 h & Pl \(\geq\) 1 \(\rightarrow\) HaSM = 4.72 h \\ \hline SB & Pl \(\geq\) 1 \(\rightarrow\) HaSM = 33.30 h & Pl \(<\) 1 \(\rightarrow\) extP = 0.001 & Pl \(<\) 1 \(\rightarrow\) extP = 0.032 \\ \hline \hline \(\mathrm{An_{1}}\) & Pl \(<\) 1 \(\rightarrow\) extP = 0.067 & Pl \(\geq\) 1 \(\rightarrow\) HaSM = 30.60 h & Pl \(<\) 1 \(\rightarrow\) extP = 0.098 \\ \hline \(\mathrm{An_{2}}\) & Pl \(\geq\) 1 \(\rightarrow\) HaSM = 91.35 h & Pl \(\geq\) 1 \(\rightarrow\) HaSM = 114.75 h & Pl \(\geq\) 1 \(\rightarrow\) HaSM = 16.42 h \\ \hline \(\mathrm{Ar_{1}}\) & & & Pl \(<\) 1 \(\rightarrow\) extP = 0.270 \\ \hline \(\mathrm{Ar_{2}}\) & & & Pl \(<\) 1 \(\rightarrow\) extP = 0.103 \\ \hline \end{tabular}
\end{table}
Table 2: Interpretation of the persistence index, calculation of the extinction probability (extP), and of the activity time safety margin (HaSM).  
Figure 3: \(p\)-values of the 42 Wilcoxon Sign Ranked tests for paired samples, corrected with the false discovery rate method (FDR). The spatial variability (circles) is studied on the left side of the graph and the temporal variability (cross) on the right side. Concerning the intra-site variability (part Replicates) and the inter-slope and inter-altitude variabilities (parts Slope and Altitude), the three grouped graduations correspond to the analysis of the data from 2017 then 2018 then 2019. For the inter-site comparisons (part Site), the graduations permit to distinguish the two replicates from the Anglas and Arrious sites. The comparison order is the same as in Tables 1 and 3–5.  
four indices indicated an activity time safety margin greater than 10% of the persistence threshold of 225 h for NH in 2017 (+0.130 -29.25 h) and 2019 (+0.304 -68.40 h), SH in 2018 (+0.154 -34.65 h), and SL in 2017 (+0.148 -33.30 h) (Tables 2 and 3).