## 3 Results
### Influence of Soil Granulometric Composition on the Occurrence of Silphidae  
The weight percentage of sand, silt, and clay fractions in the soil at individual sites was varied and statistically significant (\(\chi^{2}\) = 171.05, DF = 24, \(p\) \(<\) 0.000001). By means of the correlation test we verified the presence of a relationship between the percentage content of individual fractions and the total number of harvested Silphidae, and whether there was a relationship between the percentage content of individual fractions and the abundance of individual Silphidae species (Table 3). A positive correlation and a statistically significant relationship were found between the total number of collected specimens and the share of the mechanical fraction with a diameter of 0.05-0.002 mm (silt fraction): RS = 0.648222 (Figure 6a). For the mechanical fraction with a diameter of 2-0.05 mm (sand fraction) the correlation was negative, but sta  
Figure 5: Box plots of Silphidae recorded in all investigated sites. The thick horizontal lines within the boxes indicate median values. On each box, the bottom and top edges of the box indicate the 25 th and 75 th percentiles, respectively. Small black circles are outliers. \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline  & \multicolumn{6}{c}{**Fraction**} \\ \hline  & \multicolumn{2}{c}{**Sand**} & \multicolumn{2}{c}{**Silt**} & \multicolumn{2}{c}{**Clay (\(c\))**} \\  & \multicolumn{2}{c}{**(2–0.05 mm)**} & \multicolumn{2}{c}{**(0.05–0.002 mm)**} & \multicolumn{2}{c}{**Clay (\(c\))**} \\ \hline  & **RP/RS * & \(p\)-Value** & **RP/RS * & \(p\)-Value** & **RP/RS * & \(p\)-Value** \\ \hline
**Silphidae—total** & \(-\)0.430 & 0.143 & **0.648** & 0.017 & 0 & 1 \\ \hline  & \multicolumn{6}{c}{**Silphidae—species**} \\ \hline _Oicoptoma thoracicum_ L. & 0.463 & 0.111 & 0.202 & 0.508 & \(\mathbf{-0.573}\) & 0.041 \\ _Phosphuga atrata strata_ L. & **0.637** & 0.019 & \(-\)0.508 & 0.077 & \(-\)0.301 & 0.318 \\ _Silpha carinata_ Hbst. & 0.200 & 0.512 & \(-\)0.085 & 0.782 & 0.155 & 0.612 \\ _Silpha obscura obscura_ L. & \(-\)0.479 & 0.097 & 0.494 & 0.086 & 0.364 & 0.222 \\ _Silpha tristill_ & \(-\)0.035 & 0.910 & 0.491 & 0.088 & \(-\)0.070 & 0.821 \\ _Thanatophilus rugosus_ L. & \(-\)0.316 & 0.294 & 0.386 & 0.192 & 0.285 & 0.346 \\ _Thanatophilus simuatus_ F. & \(\mathbf{-0.771}\) & 0.002 & 0.485 & 0.093 & \(\mathbf{0.598}\) & 0.031 \\ _Nicrophorus humor [PERSON]_ & 0.352 & 0.238 & 0.076 & 0.804 & \(-\)0.488 & 0.091 \\ _Nicrophorus interruptus_ Steph. & \(-\)0.011 & 0.971 & 0.019 & 0.950 & \(-\)0.008 & 0.979 \\ _Nicrophorus investigator Zett._ & 0.108 & 0.725 & 0.418 & 0.156 & \(-\)0.318 & 0.290 \\ _Nicrophorus septuler_ [PERSON]. & \(-\)0.030 & 0.921 & 0.190 & 0.535 & 0.189 & 0.537 \\ _Nicrophorus vespillo_ L. & \(-\)0.033 & 0.915 & 0.213 & 0.485 & 0.138 & 0.653 \\ _Nicrophorus respilloides_ Hbst. & \(\mathbf{0.554}\) & 0.050 & 0.022 & 0.943 & \(\mathbf{-0.711}\) & 0.006 \\ \hline \hline \end{tabular}  
*–depending on the distribution of the examined feature, the Pearson linear correlation (R\({}_{\rm F}\)) or [PERSON]’s rank correlation (R\({}_{\rm S}\)) test were used for analysis. Bold font indicates a statistically significant result (\(p<\) 0.05).  
\end{table} 
Table 3: The results of the correlation between the number of Silphidae and the percentage content of individual fractions in the soil parts. tistically insignificant. Conversely, for the mechanical fraction with a diameter \(<\)0.002 mm (clay fraction), there was no relationship (no correlation; RS = 0). Figure 6: Scatterplots showing correlation between: (i) percentage fraction of silt (0.05–0.002 mm) and numbers of Silphidae (**a**); (ii) percentage fraction of sand (2–0.05 mm) and numbers of _P. strata strata_ (**b**), _T. simuatus_ (**c**), _N. respilloides_ (**d**); percentage fraction of clay (\(<\)0.002 mm) and numbers of _O. thoracicum_ (**e**), _T. simuatus_ (**f**) and _N. respilloides_ (**g**).