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.
Mohammadtaghi Feizi; Morteza Khodagholi; Mostafa Saeedfar; Amrali Shahmoradi
Volume 10, Issue 4 , August 2019, , Pages 387-408
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.
Hosein Arzani; Farajollah Tarnian; Javad Motamedi; Morteza Khodagholoi
Volume 21, Issue 2 , August 2014, , Pages 198-207
Abstract
Forage quality is one of the most important factors in determination of the rangeland grazing capacity and also indicates the sufficiency of nutritive requirements of grazing animals. In this research, the samples of range species (including; Acantholimon festucaceum, Andrachne fruticulosa, Artemisia ...
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Forage quality is one of the most important factors in determination of the rangeland grazing capacity and also indicates the sufficiency of nutritive requirements of grazing animals. In this research, the samples of range species (including; Acantholimon festucaceum, Andrachne fruticulosa, Artemisia sieberi, Euphorbia decipiens, Noaea mucronata, Scariola orientalis, Stachys inflate, Stipa Arabica and Stipa barbata) in Maime, which were dominant in region, were collected in three phenological stages (vegetative, flowering and seeding) in three replications, and five individual plants were collected in each replication. Then, plant samples were chemically dissolved to measure the nitrogen (N) and acid detergent fiber (ADF). A split plot in a completely randomized design was used to analyze the data. Results indicated that the mean of effective indices on forage quality had considerable changes in phenological stages and it had significant influence on the forage quality. With progress of growth stages, the amount of crude protein (CP), dray mater digestibility (DMD) and metabolism energy (ME) decreased and the amount of acid detergent fiber (ADF) increased. In addition, results showed that crude protein amounts of all studied species in vegetative and flowering stage swere more than critical level (7%) for need of daily animal requirement and in seeding stage was less than animal requirement. Mean value of dray mater digestibility (DMD) in vegetative stage was more than critical level (50%), and in flowering stage and seeding stage were less than its critical level for need of maintenance. The mean value of metabolism energy in all three phenological stages was less than critical level (8 Mj/Kg/DM) for need of maintenance of single animal unit. This suggests that desirable quality of pasture forage at different grazing times is not same and determination of daily animal unit requirement based on forage quality is needed. In general, the studied ranges are desirable in terms of supplying the required daily crude protein for animal units, grazing in rangelands, but in terms of providing metabolism energy are undesirable.
Morteza Khodagholi; Farhang Ghasriani; Mina Bayat; Mojgan sadat Azimi
Volume 19, Issue 3 , December 2012, , Pages 512-521
Abstract
Appropriate utilization of plant species in rangelands is one of the principles of sustainable production in rangeland ecosystems that leads to continuous and economic utilization of rangelands. In order to achieve stability and continuity of production in steppe rangeland, this study was performed to ...
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Appropriate utilization of plant species in rangelands is one of the principles of sustainable production in rangeland ecosystems that leads to continuous and economic utilization of rangelands. In order to achieve stability and continuity of production in steppe rangeland, this study was performed to investigate the effect of different harvesting intensities on forage production and vitality of Stipa arabica at Isfahan Soh site, during 2007 to 2010. Treatments in each block were included four grazing intensities of 25, 50 and 75% and control (no harvest). In each treatment, 10 individuals of species were used as replications evaluated on each of the dependent variables. A factorial experiment in a completely randomized design with ten replications and four years was used to analyze the data. Data analysis was performed by SAS software. Results showed that forage production of Stipa arabica did not differ statistically in response to different harvesting intensities, and up to 75 percent of this species could be harvested, but heavy harvesting intensity decreased the vigor and vitality of the species during the examined years. Harvesting intensities were significant at 1% level of probability and production rate decreased gradually over the 4 years. According to the results, a harvesting intensity of 50% is recommended for Stipa arabica in this region so that health and vitality of this species is preserved during the harvesting years.
Morteza Khodagholi; Sattar chavoshi
Volume 9, Issue 2 , September 2001, , Pages 619-634