نوع مقاله : مروری
نویسندگان
1 دانشیار گروه مرتع و آبخیزداری، دانشکده منابع طبیعی، دانشگاه ارومیه، ارومیه، ایران
2 دانشجوی دکتری علوم و مهندسی آبخیزداری، دانشکده منابع طبیعی، دانشگاه ارومیه، ارومیه، ایران
چکیده
کلیدواژه‌ها
عنوان مقاله [English]
نویسندگان [English]
Soil erosion poses a serious threat to global food security and the environment. One of the most important functions of vegetation in rangeland ecosystems is soil conservation. This study aims to conduct a meta-analysis of economic valuation studies on the soil conservation function of vegetation in rangeland ecosystems of Iran. Using descriptive and meta-analytical methods, this research investigates the economic value of the soil conservation function of vegetation in Iranian rangeland ecosystems. By analyzing existing resources and synthesizing findings from previous studies conducted between 2003- 2023, the study extracts researchers' findings related to soil erosion and the economic valuation of these ecosystems from a soil conservation perspective. Based on the evaluation of conducted studies, the methods used to estimate average soil erosion in the studied regions include PSIAC, MPSIAC, EMP, RUSLE, and IRIF. The average soil erosion in the studied areas ranges from 1.15 to 42.52 tons per hectare. Additionally, methods such as replacement cost, opportunity cost, direct valuation, and risk cost avoidance have been used to value the soil conservation function of rangeland ecosystems. The results indicate that the estimated erosion rates vary across studies depending on climatic and environmental conditions as well as the methods used, ultimately leading to differences in the economic value per hectare of the soil conservation function of rangeland ecosystems. Furthermore, price variations over the years of the conducted studies are another factor contributing to the differing economic values of the soil conservation function of these ecosystems. The economic valuation of soil conservation services provided by rangeland vegetation faces nine principal constraints: methodological standardization gaps, quantification challenges for ecosystem services, climate variability effects, unsustainable land conversion patterns, inadequate financial mechanisms, competing stakeholder agendas, regulatory implementation deficits, arid zone data paucity, and systematic disregard for traditional ecological knowledge.To enhance the preservation of the soil conservation function of rangeland ecosystems, a set of key actions is proposed, including public education and awareness, strengthening local community participation, developing new technologies, formulating incentive policies, and reinforcing laws and regulations.
کلیدواژه‌ها [English]
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