Volume 4, Issue 11 (6-2015)                   2015, 4(11): 1-14 | Back to browse issues page

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Shojaee M, Kiani B, Sotoodeh A, Azimzadeh H. Investigation of the Relation Between Primary Topographic Variables with Presence, Frequency and Quantitative Characteristics of Plant Species and Vegetation Types (Case Study: Baghe- Shadi Forest, Harat, Yazd). Iranian Journal of Applied Ecology 2015; 4 (11) :1-14
URL: http://ijae.iut.ac.ir/article-1-630-en.html
College of Natur. Resour. and Desert Studies, Yazd Univ., Yazd, Iran.
Abstract:   (9187 Views)

To investigate the relationship between slope, aspect and elevation and quantitative characteristics of plant species, totally 125 sampling plots were selected in a block systematic design. In each sampling, plot presence, number, height, diameter at breast height (for trees) or root collar (for shrubs) and crown diameters were measured and recorded. Also, we recorded vegetation type according to the portion of species in the plot. Correlation analysis was conducted according to the scale of variables using Pierson, Spearman, Phi and Cramer and Eta coefficients. Results found that elevation is the most important factor affecting presence and density and also type in the study area. Altogether, Atlas Pistach (P. atlantica F. & M) and Wild Almond (A. scoparia Spach. ) in low elevations and Maple (A. cinerascens L.), Marsh-arrow-grass (A. lycioedes Spach.) and mountain almond (A. elaefnifolia Spach.) in higher elevations had better conditions. Slope had a negative correlation with presence of Wild Almond and Send Cherry (Ephedra spp), and positive correlation with the presence of other species. Also, Wild Pistach trees present in southern aspects showed more basal area and volume in these aspects. Results of this research can be used in the detection of suitable points for development of plant species. Regression analysis showed that frequency of almond and Send Cherry and average height of almond and wild Pistach were predictable according to elevation and slope. Of course, coefficient of determination was low in all cases.

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Type of Study: Research | Subject: General

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