Roya Vazirian; Aliakbar Karimian; Mehdi Ghorbani; Seyed Alireza Afshani
Volume 28, Issue 1 , April 2021, , Pages 181-194
Abstract
Social network analysis and identification of key actors in social systems is one of the necessary measures for the sustainable management of natural resources. The purpose of the present study is to evaluate the social capital, status, and relationships of actors in the information exchange network ...
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Social network analysis and identification of key actors in social systems is one of the necessary measures for the sustainable management of natural resources. The purpose of the present study is to evaluate the social capital, status, and relationships of actors in the information exchange network and their structural pattern and to identify key actors in the three villages of Estaj, Borzu, and Izi in Sabzevar. For this purpose, first, qualitative studies of survey approach, direct observation method, and target population interview were identified. Based on the results of calculating the intermediate centrality index, the degree of input, output, and proximity in the trust matrix and participation in irrigation in the three villages studied, the role and position of actors were identified, and key actors were identified in these indexes. The results showed key actors have a high social status, authority, and influence and play a role of control and intermediary in the village. As a result, they can as social power and local leaders play a key role in the decision-making and networking processing, coordinating individuals, communicating with others, accessing resources and information, and speeding up their exchange, resolving disputes and conflicts, trust in the network and thus increase social capital. Increasing the amount of social capital as the key management tool will lead to the establishment of sustainable management of natural resources.
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Volume 9, Issue 4 , July 2020, , Pages 259-273
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Volume 9, Issue 4 , July 2020, , Pages 347-367
Ali Akbar Karimian; Samira Hossein Jafari
Volume 27, Issue 1 , April 2020, , Pages 36-46
Abstract
To manage an animal species effectively, it is necessary to identify habitats with high suitability for it; So its population can be preserved by conserving those habitats and planning to manage them properly. For this purpose, the study was done to determine Relationship between rangeland species and ...
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To manage an animal species effectively, it is necessary to identify habitats with high suitability for it; So its population can be preserved by conserving those habitats and planning to manage them properly. For this purpose, the study was done to determine Relationship between rangeland species and habitat suitability of Gazella subgutrrosa in different seasons on the basis of dung groups in Kalmand plain of Yazd province. So, sampling was done using random steady plots with 200 meters long and 2 meters wide and with 2 replications during five field investigation in summer and autumn. Random and control plots were put in different directions and were investigated every 45 days. Finally, all maps needed and information incorporation were prepared and done in ArcGIS9.3. The results showed that there is no difference in two seasons related to dung groups' density. In terms of canopy cover percentage, Artemisia species had a significant increase in presence points compared to random points; Astragalus sp. had also a significant increase in presence points compared to control points. Onopordon sp. canopy cover in absent points and Acanthophyllum sp. in random points were higher than in presence points (p<0.01).according to the prepared map, 23% of the region has topnotch suitability and 47% has second best suitability. Rocks and the regions under human activities were identified as unsuitable habitats. According to the results, it is seems that from habitat variables, species richness, Artemisia cover percent and distance from road are effective on deer habitat.
Anahita Rashtian; Ali Akbar Karimian
Volume 21, Issue 4 , March 2015, , Pages 747-755
Abstract
Investigation on the vegetation cover of rangelands under grazing and exclosure conditions is important in improvement of range management. Therefore, this research was aimed to investigate the effect of exclosure on production, density, frequency, importance value and vitally of Artemisia sieberi as ...
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Investigation on the vegetation cover of rangelands under grazing and exclosure conditions is important in improvement of range management. Therefore, this research was aimed to investigate the effect of exclosure on production, density, frequency, importance value and vitally of Artemisia sieberi as the most important species of steppe rangelands of Iran. The study was conducted in Nodushan rangelands of Yazd province under grazing and exclosure conditions. Sampling was done randomly in both grazing and exclosure areas, with 10 transects and 40 quadrates of 1m2. In addition, 30 individuals of Ar. sieberi were selected randomly in each area and plant height, maximum and minimum diameter, canopy caver, vitality and dry matter production were measured. According to the obtained results, the studied species showed no significant differences for production, average diameter, height and canopy cover percentage. However, the vitally of Ar. sieberi showed significant differences between grazing and exclosure areas. The results of importance value indicated the increased relative importance of Ar. sieberi under moderate grazing intensity. The distribution pattern of Ar. sieberi under exclosure was uniform while under grazing condition a clumped distribution pattern was observed.