Fig. 1
Fig. 2
Fig. 3
Parameters affecting the decline of oak forests in Ilam province, information source and fuzzy membership function_
| No. | Parameters | Information source | Fuzzy membership function type | References |
|---|---|---|---|---|
| 1 | Slop [%] | DEM ASTER | Linear | Eckhardt and Menard 2008, Kabrick et al. 2008, Costa et al. 2010, Ahmadi et al. 2014, Amir Ahmadi et al. 2015, Mahdavi et al. 2015a, Hosseini et al. 2017, Ghadirian et al. 2018, Kooh Soltani et al. 2018, Mozafari et al. 2019 |
| 2 | Aspect [°] | DEM ASTER | Near | Eckhardt and Menard 2008, Kabrick et al. 2008, Costa et al. 2010, Ahmadi et al. 2014, Amir Ahmadi et al. 2015, Mahdavi et al. 2015a, Hosseini et al. 2017, Ghadirian et al. 2018, Kooh Soltani et al. 2018, Mozafari et al. 2019 |
| 3 | Altitude [m asl] | DEM ASTER | Small | Eckhardt and Menard 2008, Kabrick et al. 2008, Costa et al. 2010, Ahmadi et al. 2014, Amir Ahmadi et al. 2015, Mahdavi et al. 2015a, Hosseini et al. 2017, Ghadirian et al. 2018, Kooh Soltani et al. 2018, Mozafari et al. 2019 |
| 4 | Precipitation [mm] | Information of synoptic stations of Meteorological Organization of Iran, Kriging interpolation model in GIS | Small | Eckhardt and Menard 2008, Kabrick et al. 2008, Costa et al. 2010, Ahmadi et al. 2014, Amir Ahmadi et al. 2015, Mahdavi et al. 2015a, Attarod et al. 2017, Hosseini et al. 2017, Ghadirian et al. 2018, Kooh Soltani et al. 2018, Conte et al. 2019, Mozafari et al. 2019 |
| 5 | Temperature [°C] | Information of synoptic stations of Meteorological Organization of Iran, Kriging interpolation model in GIS | Linear | Ahmadi et al. 2014, Mahdavi et al. 2015a, Attarod et al. 2017, Hosseini et al. 2017, Ghadirian et al. 2018, Kooh Soltani et al. 2018, Conte et al. 2019 |
| 6 | Distance from streams [m] | Surface water layer of Iran Water Resources Management Company | Linear | Ghadirian et al. 2018 |
| 7 | Distance from roads [m] | Iran National Cartographic Center | Linear | Ghadirian et al. 2018 |
| 8 | Distance from farming lands [m] | Iran National Cartographic Center | Linear | Ghadirian et al. 2018 |
| 9 | Forest density | Department of Natural Resources and Watershed Management of Ilam Province | Linear | Mahdavi et al. 2015a, Ghadirian et al. 2018, Conte et al. 2019 |