Volume 11, Issue 2 (9-2017)
مرتع 2017, 11(2): 179-193 |
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Tarnian F, Azarnivand H, Yazdanparast R, Zare Chahouki M, Jafari M, Kumar S. Identifying potential habitats and influencing variables on Daphne mucronata Royle distribution. مرتع 2017; 11 (2) :179-193
URL: http://rangelandsrm.ir/article-1-479-en.html
URL: http://rangelandsrm.ir/article-1-479-en.html
Farjallah Tarnian 
, Hossein Azarnivand , Raziyeh Yazdanparast , Mohammadali Zare Chahouki , Mohammad Jafari , Sanil Kumar
, Hossein Azarnivand , Raziyeh Yazdanparast , Mohammadali Zare Chahouki , Mohammad Jafari , Sanil Kumar
University of Tehran
Abstract: (5628 Views)
This study tries to model the potential habitats of Daphne mucronata Royle using ecological niche theory and Maxent model (maximum entropy). The other goals were to identify the most effective variables on the distribution of the species and to determine its ecological amplitude. The maps of twenty nine environmental variables were produced for the study area and 2413 presence points were extracted from D. mucronata vegetation type map with 3×3 km2 grids. We used presence data derived from Maxent model to determine the relative frequency of species distribution. The results indicated that seven out of 29 variables were more important for the species occurrence compared to the other variables. Precipitation of the coldest quarter (Bio19), mean temperature of wettest quarter (Bio8), and mean diurnal range in temperature (Bio2) were explained 50.6, 30 and 11.4 of the species occurrence respectively. According to the relative frequency of the species derived from the Maxent model, the potential ecological range of Bio19 was 102-273 mm and covers 96 % of relative frequency of the species distribution. The potential ecological range of bio8 was -4.2-10.4 °C and covers 98 % of relative frequency of the species distribution.
Keywords: Daphne mucronata Royle, Species distribution models (SDMs), Ecological niche theory, Bio8, Bio19.
Type of Study: Research |
Subject:
Special
Received: 2017/09/1 | Accepted: 2017/09/1 | Published: 2017/09/1
Received: 2017/09/1 | Accepted: 2017/09/1 | Published: 2017/09/1
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