[1].Evaluating the Importance of Environmental Variables on Spatial Distribution of Caspian cobra Naja oxiana (Eichwald, 1831) in Iran[J].Asian Herpetological Research,2019,10(2):129-138.[doi:10.16373/j.cnki.ahr.180063]
 Elmira KAZEMI,Mohammad KABOLI*,Rasoul KHOSRAVI and Nematollah KHORASANI.Evaluating the Importance of Environmental Variables on Spatial Distribution of Caspian cobra Naja oxiana (Eichwald, 1831) in Iran[J].Asian Herpetological Research(AHR),2019,10(2):129-138.[doi:10.16373/j.cnki.ahr.180063]
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Evaluating the Importance of Environmental Variables on Spatial Distribution of Caspian cobra Naja oxiana (Eichwald, 1831) in Iran()
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Asian Herpetological Research[ISSN:2095-0357/CN:51-1735/Q]

卷:
10
期数:
2019年2期
页码:
129-138
栏目:
出版日期:
2019-06-20

文章信息/Info

Title:
Evaluating the Importance of Environmental Variables on Spatial Distribution of Caspian cobra Naja oxiana (Eichwald, 1831) in Iran
文章编号:
AHR-2018-0063
Author(s):
Elmira KAZEMI1 Mohammad KABOLI2* Rasoul KHOSRAVI3 and Nematollah KHORASANI2
1 Department of Environment, Faculty of Natural Recources and Environment, Science and Research Branch, Islamic Azad University, Tehran, Iran
2 Department of Environmental Science, Faculty of Natural Resources, University of Tehran, Karaj, Iran
3 Department of Natural Resources and Environmental Engineering, School of Agriculture, Shiraz University, Shiraz, Iran
Keywords:
Naja oxiana MaxEnt habitat suitability landscape connectivity distribution modelling
DOI:
10.16373/j.cnki.ahr.180063
Abstract:
Over recent years, the population of Caspian cobra Naja oxiana has declined in its distribution range in Iran due to habitat destruction and overhunting. Consequently, their small and isolated populations in fragmented landscapes are facing genetic and demographic threats. Evaluating the spatial distribution pattern of Naja oxiana, identifying core habitat patches and improving landscape connectivity among the patches have a significant role in the long-term survival of the species. This study predicts the spatial distribution map of the Caspian cobra considering the factors affecting the predictive power of the distribution models, including sampling bias in presence points, correct selection of background locations, and input model parameters. The sampling bias in presence points was removed using spatial filtering. Several models were run using 19 environmental variables that eventually led to the selection of the effective habitat variables and best MaxEnt distribution model. We also used an ensemble model (EM) of habitat suitability methods to predict the potential habitats of the species. Topographical roughness, shrublands, average annual precipitation, and sparse rangeland with a density of ≤ 20% had the most effect on the spatial distribution of Caspian cobra. The evaluation of models confirmed that the EM has more predictive performance than MaxEnt in predicting the distribution of Naja oxiana.

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更新日期/Last Update: 2019-06-25