morteza Khodagholi; Razieh Saboohi; Mina Bayat; Parvaneh Ashouri; Javad Motamedi (Torkan)
Volume 29, Issue 4 , January 2023, , Pages 530-541
Abstract
Understanding the environmental factors affecting the establishment of vegetation, can help in the proper management of rangeland ecosystems. Optimal habitat has a beneficial effect on the survival and reproduction of species. With the advancement of statistical science and GIS, it has become possible ...
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Understanding the environmental factors affecting the establishment of vegetation, can help in the proper management of rangeland ecosystems. Optimal habitat has a beneficial effect on the survival and reproduction of species. With the advancement of statistical science and GIS, it has become possible to predict the habitat of plant species using modeling methods. Therefore, the present study was conducted with the aim of preparing a forecast map of B. tomentellus habitats based on the climate forecast model in South Zagros (Fars province). First, using 29 synoptic stations inside and adjacent areas, a database including variables of precipitation, night temperature, daily temperature and average temperature was formed and 19 climatic measures were calculated. Also, using a digital height model with an accuracy of 30 meters, three physiographic variables including slope, direction and height were prepared. Then, using updated maps of ecological zones and field visits, the presence and absence points of B. tomentellus were identified. Using logistic regression, the growth behavior of this species in the South Zagros region was determined and the model map and the corresponding equations were calculated in the current conditions. Using current equations and placement of data extracted from the Worldclime database, the future distribution map of B. tomentellus for 2050 was generated under the RCP4.5 and RCP8.5 climate scenarios. The results showed that B. tomentellus species will migrate to higher altitudes of 170 and 260 m, respectively, in the RCP4.5 and RCP8.5 scenarios. Also, the area of suitable habitat areas, from 26.8% of the area of South Zagros rangeland habitats in the current conditions, to 8.5% under the RCP4.5 scenario and 1.7% under the pessimistic scenario (RCP8.5) in 2050 Will be reduced.
Razieh Saboohi; Farzad Heidari Mourchekhorti; Morteza Khodagholi; Somayeh Salehpour
Volume 28, Issue 2 , June 2021, , Pages 280-295
Abstract
The use of polymers to control wind erosion has been considered in recent years. However, before recommending them as mulch, their effects on the environment and reduction of wind erosion should be investigated. In this paper, the effect of Imen Asia polymer in stabilizing quicksands and reducing wind ...
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The use of polymers to control wind erosion has been considered in recent years. However, before recommending them as mulch, their effects on the environment and reduction of wind erosion should be investigated. In this paper, the effect of Imen Asia polymer in stabilizing quicksands and reducing wind erosion in both laboratory and field sections in the Lower Jargooiyeh region was investigated. For this purpose, first, an emulsion of polymer in water with a ratio of one to three (one-part polymer in two parts water) was prepared and to investigate its effect on reducing erosion, a volume of emulsion containing 80, 100, and 120 kg of polymer in 25 m2 plots Sprayed with three repetitions. The results showed that the wind erosion threshold speed after mulching increased from 3.5 to more than 11 m / s in all treatments. The study of the environmental effects of the polymer showed that the concentration of mulch did not affect the germination of native plants and the lifestyle of insects and rodents in the area. The effect of polymer on the physical and chemical properties of soil, including changes in the number of toxic elements and heavy metals on the soil before and after mulching, also confirms that it does not have a negative effect on these properties. Economically, the cost of using this polymer per hectare was evaluated. Based on the net present value (NVP) of this material and its internal rate of return (IRR), the economics of using it and investing in the use of this polymer as mulch are justified. Due to the lack of harmful effects on the environment and the ability to reduce wind erosion and economical to oil mulch, the use of this polymer as mulch is recommended
Razieh Sabohi; Hosein Barani; Morteza Khodagholi; Ahmad Abedi Sarvestani; Asghar Tahmasebi
Volume 25, Issue 2 , August 2018, , Pages 438-453
Abstract
Undoubtedly, one of the most important and impressionable societies to climate changes are nomadic societies and indigenous knowledge has pervasive roles in range and livestock management. For this purpose, perception and knowledge of the pastoral nomads to climate change were determined ...
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Undoubtedly, one of the most important and impressionable societies to climate changes are nomadic societies and indigenous knowledge has pervasive roles in range and livestock management. For this purpose, perception and knowledge of the pastoral nomads to climate change were determined in summer rangelands of Semirom. The study population included the nomads of summer rangelands in Semirom. A total of 7700 nomads from different tribes of Qashqaei including Dareshoori, Amale, Shesh bolooki, and Farsimadan use summer rangeland of Semirom. To evaluate the indigenous knowledge and adaptation of nomads to climate changes, several methods were used such as depth and group interviews and questionnaires. The effects of age, sex, education, and range elevation were analyzed using Mann-Whitney test. The nomads believe that changes in temperature, precipitation, and wind are the main signs of climate change, as over 90 percent of nomads believe to precipitation decrease, increasing temperature, and wind speed. The most of the questions are influenced by age, sex, education, and range elevation. The questionnaires refer to adaptations such as delay time of migration, construction of block houses and pools, reducing livestock, feeding livestock with other forage resources etc. Our results showed that nomads of Qashqaei tribes acquired a perception about climate change during living in the nature.
Valiollah Raufirad; razie sabouhi; gholamreza shojae; setareh bagheri
Volume 24, Issue 1 , May 2017, , Pages 57-66
Abstract
Range management plans (RMPs) are one of the main tools for the management and utilization of rangelands in Iran. Range size, number of animal units, and rangeland users are considered as the most important factors influencing RMPs. This study was conducted in the rangelands of Isfahan province in 2008 ...
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Range management plans (RMPs) are one of the main tools for the management and utilization of rangelands in Iran. Range size, number of animal units, and rangeland users are considered as the most important factors influencing RMPs. This study was conducted in the rangelands of Isfahan province in 2008 in order to study the relationship between range size, the ratio of permitted animal unit to existing animal unit and number of rangeland users with range condition. Accordingly, the list of RMPs was prepared. Then, the range size, the number of permitted and existing animal units and rangeland users were determined. After that, the range condition was determined using four-factor (winter rangelands) and six-factor methods (summer rangelands). Finally, the relationship between range size, the ratio of the permitted animal unit to the existing animal unit and number of rangeland users (separately and commonly) with range condition was verified by using spearman correlation and discriminate analysis. Results indicated that there was a significant relationship between range size (P≤ 0.01) and the ratio of the permitted to the existing animal unit (P≤0.05) with range condition in summer rangelands. Therefore, it is concluded that range size and animal unit could be considered as one of the factors affecting rangeland degradation.