Table 3 The results of CCA analyses. First analysis: the effect of the study area (Ore Mts., Trebon Basin), year (2015–2017), and sampling period (April, May) on the vocal occurrence (0/1) of each owl species. Second analysis: the effect of the study area, year, and sampling period (spring, autumn) on nest box occupancy (0/1) by animal taxa (boreal owl, goldeneye, pine marten, passerines, bats, and insects).
From: Forest structure determines nest box use by Central European boreal owls
Response variable | Explanatory variable | % of explained variability | F | P |
|---|---|---|---|---|
Vocal occupancy rate | Study area | 56.53 | 8.2 | 0.002 |
Year | 26.37 | 3.8 | 0.002 | |
Sampling period | 8.28 | 1.2 | 0.306 | |
Nest box occupancy rate | Study area | 36.87 | 30.0 | 0.002 |
Sampling period | 50.31 | 40.4 | 0.002 | |
Year | 8.05 | 6.6 | 0.002 |
