Table 1.
List, area and location of the analysed urban forests in Katowice
| No. | District | Area (ha) | Localisation | |
|---|---|---|---|---|
| N | E | |||
| 1 | 2 | 3 | 4 | 5 |
| 1. | Muchowiec | 2.7 | 50.241908 | 19.033019 |
| 2. | Muchowiec | 3.7 | 50.242854 | 19.028191 |
| 3. | Szopienice (Borki) | 8.0 | 50.278260 | 19.085934 |
| 4. | Szopienice (Borki) | 3.0 | 50.273858 | 19.092457 |
| 5. | Szopienice (Borki) | 2.5 | 50.271047 | 19.097414 |
| 6. | Szopienice (Borki) | 9.0 | 50.275485 | 19.097414 |
| 7. | Szopienice (Borki) | 2.0 | 50.271403 | 19.102413 |
| 8. | Burowiec | 2.4 | 50.273186 | 19.078531 |
| 9. | Dąbrówka Mała (Norma) | 1.7 | 50.272089 | 19.062395 |
| 10. | Pniaki | 5.2 | 50.280015 | 19.056901 |
| 11. | Dąbrówka Mała | 3.4 | 50.282319 | 19.068961 |
| 12. | Osiedle 1000-lecia | 4.8 | 50.277237 | 18.968822 |
| 13. | Osiedle 1000-lecia | 3.7 | 50.272749 | 18.967893 |
| 14. | Osiedle 1000-lecia | 1.4 | 50.271082 | 18.972764 |
| 15. | Osiedle 1000-lecia | 4.2 | 50.270299 | 18.985690 |
| 16. | Załęska Hałda | 1.8 | 50.250420 | 18.994464 |
| 17. | Załęska Hałda | 2.6 | 50.254042 | 18.997575 |
| 18. | Załęska Hałda | 2.0 | 50.247090 | 18.984634 |
| 19. | Kokociniec | 3.5 | 50.231153 | 18.958849 |
| 20. | Kokociniec (Płochy) | 3.9 | 50.233992 | 18.966832 |
| 21. | Osiedle Paderewskiego | 5.0 | 50.245109 | 19.048359 |
| 22. | Wilhelmina | 4.9 | 50.249884 | 19.093892 |
| 23. | Nikiszowiec | 3.9 | 50.246454 | 19.083292 |
| 24. | Dąbrówka Mała | 7.5 | 50.287081 | 19.070160 |
| 25. | Dąbrówka Mała | 7.4 | 50.290373 | 19.061810 |
| 26. | Józefowiec (Kolonia Alfred) | 7.1 | 50.290229 | 19.013960 |
| 27. | Józefowiec (Kolonia Alfred) | 1.9 | 50.292573 | 19.008059 |
| 28. | Brynów (Park Kościuszki) | 3.0 | 50.239455 | 19.002028 |
| 29. | Osiedle Witosa | 1.7 | 50.262051 | 18.963812 |
| 30. | Obroki | 3.7 | 50.266550 | 18.957426 |
Figure 1.
The average number of species in the analysed urban forests in Katowice
Table 2.
The share of native species in the analysed urban forests in Katowice
| No. | Tree species | Number of forests | % of forests | Number of forests where species prevaile |
|---|---|---|---|---|
| 1. | Acer campestre | 4 | 13.3 | - |
| 2. | Acer platanoides | 28 | 93.3 | 3 |
| 3. | Acer pseudoplatanus | 22 | 73.3 | - |
| 4. | Alnus glutinosa | 10 | 33.3 | 2 |
| 5. | Betula pubescens | 2 | 6.7 | - |
| 6. | Betula pendula | 30 | 100 | 16 |
| 7. | Carpinus betulus | 8 | 26.7 | - |
| 8. | Cerasus avium | 21 | 70 | - |
| 9. | Crataegus monogyna | 22 | 73.3 | - |
| 10. | Euonymus europaeus | 2 | 6.7 | - |
| 11. | Fagus sylvatica | 9 | 30 | - |
| 12. | Fraxinus excelsior | 22 | 73.3 | 1 |
| 13. | Larix decidua | 2 | 6.7 | - |
| 14. | Padus avium | 24 | 80 | - |
| 15. | Picea abies | 1 | 3.3 | - |
| 16. | Pinus sylvestris | 12 | 40 | 1 |
| 17. | Populus xcanescens | 3 | 10 | - |
| 18. | Populus nigra | 20 | 66.7 | 4 |
| 19. | Populus tremula | 30 | 100 | 11 |
| 20. | Quercus petraea | 3 | 10 | - |
| 21. | Quercus robur | 27 | 90 | 3 |
| 22. | Salix alba | 1 | 3.3 | - |
| 23. | Salix caprea | 29 | 96.7 | 1 |
| 24. | Salix fragilis | 18 | 60 | 1 |
| 25. | Salix purpurea | 2 | 6.7 | - |
| 26. | Sambucus nigra | 16 | 53.3 | - |
| 27. | Sorbus aucuparia | 25 | 83.3 | - |
| 28. | Tilia cordata | 27 | 90 | 1 |
| 29. | Tilia platyphyllos | 8 | 26.7 | - |
| 30. | Ulmus laevis | 7 | 23.3 | - |
| 31. | Ulmus glabra | 6 | 20 | - |
Table 3.
The share of alien species in the structure of the analysed urban forests in Katowice
| No. | Tree species | Tree stand | Undergrowth | ||
|---|---|---|---|---|---|
| number of forests | sum of abundance categories (average) | number of forests | sum of abundance categories (average) | ||
| 1. | Acer ginnala | - | - | 1 | 1 (1) |
| 2. | Acer negundo | 24 | 44 (1.8) | 25 | 55 (2.2) |
| 3. | Acer saccharinum | 2 | 2 (1) | - | - |
| 4. | Aesculus hippocastanum | 14 | 15 (1.1) | 17 | 18 (1) |
| 5. | Caragana arborescens | - | - | 1 | 1 (1) |
| 6. | Fraxinus pennsylvanica | 17 | 31 (1.8) | 18 | 33 (1.8) |
| 7. | Juglans regia | 19 | 22 (1.2) | 26 | 46 (1.8) |
| 8. | Laburnum anagyroides | - | - | 1 | 1 (1) |
| 9. | Malus domestica | 12 | 12 (1) | 1 | 1 (1) |
| 10. | Padus serotina | 26 | 53 (2) | 29 | 80 (2.8) |
| 11. | Populus ‘NE 42’ | 14 | 21 (1.5) | - | - |
| 12. | Populus candicans | 4 | 7 (1.7) | - | - |
| 13. | Populus nigra ‘Italica’ | 4 | 7 (1.7) | 1* | 1 (1) |
| 14. | Populus simonii | 1 | 1 (1) | - | - |
| 15. | Populus × berolinensis | 15 | 24 (1.6) | 2* | 3 (1.5) |
| 16. | Populus × canadensis | 6 | 8 (1.3) | 1* | 1 (1) |
| 17. | Prunus domestica | 15 | 18 (1.2) | 7 | 8 (1.1) |
| 18. | Pyrus communis | 4 | 4 (1) | 1 | 1 (1) |
| 19. | Quercus rubra | 19 | 42 (2.2) | 28 | 58 (2.1) |
| 20. | Robinia pseudoacacia | 29 | 78 (2.7) | 29 | 71 (2.5) |
| 21. | Sorbus intermedia | 3 | 3 (1) | 3 | 3 (1) |
| 22. | Syringa vulgaris | 1 | 1 (1) | 2 | 2 (1) |
Figure 2.
The most common native species in the analysed forests (above 25% of forests)
Figure 3.
The most common alien species in the analysed forests (above 25% of forests)
Figure 4.
Percentage of native and alien tree species in the analysed forests (numbering of objects as in Tab. 1)
Figure 5.
The most common tree species in the analysed forests; * – alien species