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Environment factors affecting the distribution of Species Prangos uloptera in Rangelands of Ardabil Province

Document Type : Research Paper

Authors

1 Ph.D. Student of Range Management, Faculty of Agricultural and Natural Resources, University of Mohaghegh Ardabili, Ardabil, Iran

2 Associate Professor, Faculty of Agricultural and Natural Resources, University of Mohaghegh Ardabili, Ardabil, Iran

3 Professor, Department of Reclamation of Arid and Mountainous Regions, Faculty of Natural Resources, University of Tehran, Karaj, Iran

4 Assistant Professor, Faculty of Agricultural and Natural Resources, University of Mohaghegh Ardabili, Ardabil, Iran

Abstract

The aim of this study was to investigate the effects of environmental factors on distribution of Prangos uloptera in rangelands of Ardabil province. The habitats of Prangos were identified and the habitats, in which the study species was present, were selected. Sampling was also carried out in the vicinity of each habitat where the study species was not present. Three transects of 100-m length were established, on which canopy cover percentage and density of species were measured within 10 plots of 4m2. Soil samples were taken from the beginning, middle and end of each transect. In sampling places, altitude, slope, aspect, and soil characteristics were measured. Independent t test and cluster analysis were applied to comparison and classification of presence and non-presence areas and determination function was applied to determine the importance of factors affecting the presence of this species. The results of t test showed that there were significant differences between all variables except for temperature and precipitation. According to the results of cluster analysis, the studied species had more distribution in places with high altitude and steep slopes, high organic matter, and high nitrogen and sand. The results clearly showed that climatic parameters including precipitation and temperature as awell as altitude and sand percentage in the first grade and then aspect and soil characteristics including nitrogen and phosphorus in the second grade were the most important factors affecting the distribution of study species. According to the results, better decisions could be taken to use this species for range management, improvement and reclamation.

Keywords

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Iranian Journal of Range and Desert Research
Volume 24, Issue 4
January 2018
Pages 791-804
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