Table 4.
Relative contribution (in percent) of the habitats within a 10-km radius around the colonies of black-headed gulls, Chroicocephalus ridibundus (according to the Corine Land Cover (CLC2006) model; http://www.eea.europa.eu/; EEA Copenhagen, 2012)
| Habitat type | Bydgoszcz | Koronowo | Skoki Duże | Kusowo | Pakość | Total | G test: P |
|---|---|---|---|---|---|---|---|
| Agriculture areas | 27.6 | 51.6 | 47.2 | 70.7 | 85.8 | 56.6 | 0.004 |
| Urbanized area | 20.9 | 1.6 | 0.3 | 1.6 | 4.2 | 5.7 | 0.002 |
| Forested areas | 47.9 | 42.2 | 40.3 | 25.3 | 6.3 | 32.4 | 0.0009 |
| Water bodies | 0.2 | 4.5 | 0.9 | 0.5 | 3.7 | 1.9 | 0.41 |
| Water coursesa | 3.4 | 0.1 | 11.2 | 1.9 | – | 3.3 | 0.046 |
| Wetlandsa | – | 0.02 | – | 0.16 | 0.08 | 0.1 | 1.00 |
G test: result of a G test comparing the proportions of particular habitat types among the studied colonies
aAfter adding 0.1