Volume 76 (2023)
Volume 75 (2022)
Volume 74 (2021)
Volume 73 (2020)
Volume 72 (2019)
Volume 71 (2018)
Volume 70 (2017)
Volume 69 (2016)
Volume 68 (2015)
Volume 67 (2014)
Volume 66 (2013)
Volume 65 (2012)
Volume 63 (2010)
Volume 62 (2009)
Grazing effects on the relationship between vegetation canopy cover and above-ground phytomass with vegetation indices in Sabzekouh region, Chaharmhal va Bakhtiari

Reza Omidipour; Ataollah Ebrahimi; Pejman Tahmasebi; Marzban Faramarzi

Volume 73, Issue 1 , June 2020, , Pages 33-47


  Vegetation canopy cover (VCC) and Above-Ground Phytomass (AGP) are the most important indicators of rangeland ecosystem’s structure and function, therefore their accurate evaluation and monitoring is vital for ecosystem welfare. Vegetation indices, are essential tools for assessing and monitoring ...  Read More

Comparison of distance-based methods of density estimation of Astragalus verus Olivier and Astragalus albispinus Sirj. & Bornm. (Case study: Steppe Rangeland of Marjan, Chaharmahal-Va-Bakhtiari)

Hamid Jamali; Ataollah Ebrahimi; Elham Ghesareh Ardestani; Fatemeh Pordel

Volume 72, Issue 4 , March 2020, , Pages 926-940


  Density is an important indicator of vegetation evaluation, which several methods have been developed for its assessment, but their accuracy is concerned. To reveal accuracy of each methods, a study site of 32000-m2 in the steppe rangeland of Marjan, Boroujen was selected and divided into eight macroplots ...  Read More

Modelling and mapping effects of managerial and biophysical factors on occurrence of forest and rangelands fire in Chahrmahal-va-Bakhtiari province using geographically weighted regression

Azam Karimi; Ataollah Ebrahimi; Esmaeil Asadi borojeni; Pejman Tahmasebi; Rahman Tavakoli

Volume 72, Issue 1 , June 2019, , Pages 227-240


  One of the important factors threatening forests and rangeland is fires that leads to destruction of a large part of forests and rangelands. Study of this phenomenon and providing management strategies plays a major role to deal with and control such crisis. This study aimed to identify the affecting ...  Read More

Monitoring and Predicting of Land Use Changes in Farsan Watershed Using LCM

Sina NabiZadeh; Ataollah Ebrahimi; Masoumeh Aghababaei; Iraj Rahimi

Volume 72, Issue 1 , June 2019, , Pages 263-278


  The land use of the watersheds is one of the most affected and highly vulnerable due to developmental process which effect on the other variables such as the hydrological function. The purpose of this research is to monitor land use changes in the past and to investigate predictability of its future ...  Read More

Evaluation of the Efficiency of Satellite Imagery Classification Approaches in Monitoring of Land Cover Changes (Case Study: Shahrekord Basin, Chaharmahal va Bakhtiari)

elahe zafarian; Ataollah Ebrahimi; Reza Omidipour

Volume 71, Issue 3 , December 2018, , Pages 699-714


  Land cover mapping is essential for natural resource management. Satellite imagery can be used for mapping land cover. Several methods are available for land cover mapping whilst choosing the best method is one of the most important issue in this context. To compare pros and cons of three methods of ...  Read More

Evaluation of change detection and future condition of meadow-land ecosystem of Shahrekord using Landsat data

Elham Kianisalmi; Ataollah Ebrahimi

Volume 71, Issue 2 , September 2018, , Pages 473-484


  Wetland meadows as a natural ecosystems plays an important role on sustainability of nature, although are enormously under drainage and changing in the recent years. Shahrekord meadow, which is located adjacent to the city, considered as a natural heritage due to its contribution to tourist visiting, ...  Read More

Establishing the appropriate model of height-weight relationship of two key species of Dactylis glomerata and Bromus tomentosus to estimate utilization of Javaherdehs’ rangeland of Ramsar

mahdie mahmoodi; Ataollah Ebrahimi; Mohammad Hasan Jouri; pejman tahmasebi

Volume 70, Issue 4 , January 2018, , Pages 991-1003


  The evaluation of utilization of key species is cornerstone of decision-making in rangeland management. Measuring utilization is essential for regulating grazing intensity, grazing pressure and distribution of animals. utilization of two key grass species of Dactylis glomerata and Bromus tomentosus, ...  Read More

Comparison of three methods of vegetation/land cover mapping, including remote sensing, Physiographic and Geomorphologic

shahrebanoo rahmani; Ataollah Ebrahimi; alireza davoudian

Volume 70, Issue 3 , December 2017, , Pages 661-68


  In this study, three methods were evaluated for vegetation mapping. For remote sensing method, in addition to IRS data of LISSIII, Ddigital Elevation Model (DEM) and Normalized Difference Vegetation Index (NDVI) were used for classification of 14 classes of land covers mostly vegetation types using a ...  Read More

Effect of sampling group and life-form on estimation ofrelationship between forage production and canopy cover

Ataollah Ebrahimi

Volume 70, Issue 1 , June 2017, , Pages 19-30


  Canopy cover and forage production have always been two important indicators in rangeland assessment, which sometimes are applied as surrogates of each other. These two indicators are widely used in rangeland studies and have a vital role in evaluation of rangeland structure and functions. Occasionally, ...  Read More

Secondary Compounds as Indicator of Plant Palatability (Case Study: Karsanak Rangelands of Chaharmahal-Va-Bakhtiari Province)

Ataolah Ebrahimi; valiollah Raufirad; Hosein Arzani; Zahra Shojaei Asadeiye

Volume 69, Issue 2 , July 2016, , Pages 297-309


  Determination of rangeland species palatability has some functions such as defining the rangeland grazing capacity and plant composition estimation. Despite the importance of palatability in rangeland management, no appropriate palatability indicator has been defined yet. Therefore, developing an accurate, ...  Read More

Generating a Vegetation Map in Mountainous Region of Sabzkouh Using a Digital Elevation Model

Shahrebanoo Rahmani; Ataollah Ebrahimi; Alireza Davoudian

Volume 66, Issue 1 , April 2013, , Pages 89-109


  The analysis of the relationship between spatial distribution of environmental factors andvegetation types is crucial for understanding mountainous ecosystems. In this research aGIS based approach was used to produce a vegetation map for Sabzkouh protected area inthe Chaharmahal-Va-Bakhtiari province. ...  Read More