Quantifying the Effect of Environmental Factors on the Distribution of Brown Bears (Ursus arctos) in Zagros Oak (Quercus) Forests (Case Study: Ghalajeh Protected Area)

Document Type : Ecology

Authors

Department of Environment, Faculty of Natural Resources and Environment, University of Malayer, Malayer, Iran

Abstract

Ghalajeh Protected area as one of the most important Forest habitats in Zagros Mountains is located in Kermanshah province and is known for the Greatest Carnivorous. The aim of this study was modeling the Distribution of brown bear (Ursus arctos) using Maximum Entropy method. For this purpose, 168 Presence Points were collected in the annual period (2017-2018) for studying the habitat of species. 13 environmental variables including slope direction, Compound Topographic Index, elevation, distance from the points of presence of the tribes, distance from the stream, distance from the garden, distance from the river, distance from the road, distance from the village, ecotone, Heat Load Index, Normalized difference vegetation index and slope index were used as effective ecological variables on the species. The validity of the model was measured from the surface below the curve or AUC, which was calculated as 0.86, which indicates the high model's ability to distinguish between suitable and unsuitable habitats. Also, the results of the studying the importance of habitat variables were Jackknife analysis showed that the most important variables in the selection of brown bear habitat in Ghalajeh protected area are distance from the river, distance from the garden and Normalized difference vegetation index.

Keywords


  1. Anderson, M.C.; Watts, J.M.; Freilich, J.E.; Yool, S.R.; Wakefield, G.L.; Mccaulery, J.F. and Fahnestock, A., 2000. Regression tree modeling of desert tortoise habitat in the central Mojave Desert. Ecological Application Jur7. Vol. 3, pp: 890-798.
  2. Gutleb, B. and Ziaie, H., 1999. On the distribution and status of the Brown Bear, Ursus arctos, and the Asiatic Black Bear, U. thibetanus, in Iran. Zoology in the Middle East. Vol. 18, No. 1, pp: 5-8.
  3. Haghani, A.; Aliabadian, M.; Sarhangzadeh, J. and Setoodeh, A., 2016. Seasonal habitat suitability modeling and factors affecting the distribution of Asian Houbara in East Iran. Heliyon. 2(8), - -IUCN. 2017. The IUCN Red List of Threatened Species, Version 2016-1. Available at: www.iucnredlist.org. (Accessed: 10 July 2017). e00142.
  4. Laramie, A., 2004. Species assessment foe Gray Wolf (Canis lupus) in Wyoming Carron Meaney. Wyoming Natural Diversity Database. University of Wyoming. Dept Ltd. 186 p.
  5. Martin, J.; Basille, M.; Van Moorter, B.; Kindberg, J.; Allainé, D. and Swenson, J. E., 2010. Coping with human disturbance: Spatial and temporal tactics of the brown bear (ursus arctors). Canadian Journal of Zoology. Vol. 88, pp: 875-883.
  6. Mateo-Sánchez, M.C.; Balkenhol, N.; Cushman, S.; Pérez, T.; Domínguez, A. and Saura, S., 2015. Estimating effective landscape distances and movement corridors: comparison of habitat and genetic data. Ecosphere. Vol. 6, No. 4, pp: 1-16.
  7. McLoughlin, P.D.; Ferguson, S.H. and Messier, F.O., 2000. Intraspecific variation in home range overlap with habitat quality: a comparison among brown bear populations. Evolutionary Ecology. Vol. 14, No. 1, pp: 39-60.
  8. Mertzanis, G.; Kallimanis, A.; Kanellopoulos, N.; Sgardelis, S.; Tragos, A. and Aravidis, I., 2008. Brown bear (Ursus arctos) habitat use patterns in two regions of northern Pindos, Greece management implications. Journal of Natural History. Vol. 42, No. 5, pp: 301-315.  
  9. Morrison, M.; Marcot, L. and Mannan, R., 2012. Wild life habitat relationships Concepts and applications. University of Wisconsin Press Ltd. Madison. Wisconsin, USA. 130 p.
  10. Nawaz, M.A., 2008. Ecology, genetics and conservation of Himalayan brown bears, PhD Thesis, Department of Ecology and Natural Resource Management, Norwegian University of Life Sciences. 224 p.
  11. Narumalani, S.; Mishra, D.R.M. and Rothwell, R.G., 2004. Change detection and landscape metrics for inferring anthropogenic processes in the greater EFMO area. Remote Sensing of Environment. Vol. 91, pp: 478-489.
  12. Piédallu, B.; Quenette, P. Y.; Bombillon, N.; Gastineau, A.; Miquel, C. and Gimenez, O., 2017. Determinants and patterns of the endangered brown bear Ursus arctos habitat use in the French Pyrenees revealed by occupancy modeling. Animal Conservation. Vol. 21, No. 4, pp: 352-362.  
  13. Phillips, S.J.; Anderson, R.P. and Schapire, R.E., 2006. Maximum entropy modeling of species geographic distributions. Ecological Modelling. Vol. 190, pp: 231-259.  
  14. Posillico, M.; Meriggi, A.; Pagnin, E.; Lovari, S. and Russo, L., 2004. A habitat model for brown bear conservation and land use planning in the central apennines. Journal of Biological Conservation. Vol. 118, No. 2, pp: 141-150.   
  15. Simberloff, D., 1999. Biodiversity and bears: A conservation paradigm shift. Ursus.Vol. 11, pp: 25-31.
  16. Skuban, M.; Finďo, S.; Kajba, M.; Koreň, M.; Chamers, J. and Antal, V., 2017. Effects of roads on brown bear movements and mortality in Slovakia. European Journal of Wildlife Research. Vol. 63, No. 5, 82 p.
  17. Su, J.; Aryal, A.; Hegab, I. M.; Shrestha, U. B.; Coogan, S. C.; Sathyakumar, S. and Fu, H., 2018. Decreasing brown bear (Ursus arctos) habitat due to climate change in Central Asia and the Asian Highlands. Ecology and Evolution.
  18. Zaniewski, A.E.; Lehmann, A. and Overton, J.M., 2002. Predicting species spatial distributions using presence-only data: a case study of native New Zealand ferns. Ecological modelling. Vol. 157, No. 2, pp: 261-280.