Morteza Saberi; vahid karimian
Abstract
The studies of functional features of patches of rangelands will help effectively in the detection the healthiness of arid and semi-arid rangelands, the improvement of soil conditions as well as the recognition of the effects of managerial and natural changes of rangelands. In order to investigate the ...
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The studies of functional features of patches of rangelands will help effectively in the detection the healthiness of arid and semi-arid rangelands, the improvement of soil conditions as well as the recognition of the effects of managerial and natural changes of rangelands. In order to investigate the function of landscape, sampling from Niatak region of Sistan was conducted in the same condition that had some native plant species such as Alhagi camelorum and Salsola rigida and two planted species namely Tamarix ramosissima and Haloxylon persicum. Effect of these plant pots was investigated on characteristics of ecosystem function. 4 transect with 150 meters long was established and 11 soil surface indices was determined by using of three characteristics of stability, infiltration and cycling of nutrient from LFA method. The results indicated that two planted plant species had higher function rather than native plant species and differences were significant. Tamarix ramosissima had the highest function among the native and established plant species. In general, high function in planted patches ecological could be suggested to select suitable species in restorations of similar rangeland.
s.m Hoseini; M.R Ekhtesasi; A.R Shahriyari; H Shafiei
Volume 63, Issue 2 , September 2010, , Pages 165-18
Abstract
Sistan plain is affected by desertification and this phenomenon has serious impacts on roads and socio- economic activities of local people of this region. The main purpose of this study is estimating the current and potential desertification intensity of Niatak region of Sistan based on MICD method. ...
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Sistan plain is affected by desertification and this phenomenon has serious impacts on roads and socio- economic activities of local people of this region. The main purpose of this study is estimating the current and potential desertification intensity of Niatak region of Sistan based on MICD method. That, through it the working units of this region were prepared as the base map for evaluating to consider the factors and indices by geomorphology method. Also, in order to prepare the desertification intensity condition for both current and potential situations of this region, the desertification intensity of various applications was determined and relative plans to current and potential desertification of each land use were prepared after evaluating wind erosion indices and accumulating their scores for each working unit based on reference tables. The results showed that in this region the desertification potential consists of medium (III), intensive (IV) and very intensive (V) classes, while current desertification condition includes low (II), medium (III) and intensive (IV) classes of desertification intensity, respectively. These variations were resulted by wind erosion control activities over recent years.
