Pakzad, Z., Raeini Sarjaz, M., Khodagholi, M. (2013). Evaluation the effects of climate factors on distribution of the habitats of Astragalus adscendens in Isfahan province. , 20(1), 199-212. doi: 10.22092/ijrdr.2013.3009
Zahra Pakzad; Mahmoud Raeini Sarjaz; Morteza Khodagholi. "Evaluation the effects of climate factors on distribution of the habitats of Astragalus adscendens in Isfahan province". , 20, 1, 2013, 199-212. doi: 10.22092/ijrdr.2013.3009
Pakzad, Z., Raeini Sarjaz, M., Khodagholi, M. (2013). 'Evaluation the effects of climate factors on distribution of the habitats of Astragalus adscendens in Isfahan province', , 20(1), pp. 199-212. doi: 10.22092/ijrdr.2013.3009
Pakzad, Z., Raeini Sarjaz, M., Khodagholi, M. Evaluation the effects of climate factors on distribution of the habitats of Astragalus adscendens in Isfahan province. , 2013; 20(1): 199-212. doi: 10.22092/ijrdr.2013.3009

Evaluation the effects of climate factors on distribution of the habitats of Astragalus adscendens in Isfahan province

تحقیقات مرتع و بیابان ایران
Article 15, Volume 20, Issue 1, June 2013, Pages 199-212    PDF (1.1 M)
Document Type: Research Paper
DOI: 10.22092/ijrdr.2013.3009
Authors
Zahra Pakzad* 1; Mahmoud Raeini Sarjaz2; Morteza Khodagholi3
1M.Sc. of Agricultural Meteorology, Sari Agricultural Sciences and Natural Resources University, Sari, Iran
2Associate Professor, Department of Agricultural Engineering, Sari Agricultural Sciences and Natural Resources University, Sari, Iran
3Assistant Professor, Research Centre for Agriculture and Natural Resources, Isfahan, Iran
Abstract
To investigate the effect of climatic factors on distribution of Astragalus adscendens in rangelands of Isfahan province, 57 climatic variables with most importance in terms of ecology of this species were selected. Data were tested by factor analysis in SPSS 16. The maps of Isfahan climatic factors in the factor analysis were drawn and integrated with the map of vegetation types and digital elevation map to identify the habitat of Astragalus adscendens. According to the results, the first three factors could explain 90.2% of total variance in selected variables as follows: temperature, precipitation, and radiation and wind, with 47.4, 30, and 12.8% of variance, respectively. The three climate factors were compared with the average of climate elements in the habitats of Astragalus adscendens and the areas without this species. Results showed that the areas with an altitude of 2400 m which have approximately 50% relative humidity, with more than 400 mm of rainfall per year and relative radiation are considered as the main habitat for Astragalus adscendens. The tolerance of this species to climatic factors is limited.
Keywords
Astragalus adscendens; climatic factors; factor analysis; habitats of Isfahan province
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