جستجوی مقالات مرتبط با کلیدواژه « ارزیابی پایداری » در نشریات گروه « اکولوژی »

Kitchen garden crops are really important in the stability and balance of the agricultural ecosystem of the Sistan region. Regarding the significance of food, economy, and job creation, it is vital to study these ecosystems.five production systems of kitchen garden products, including gandak, sefidak, pashmak, watermelon, and melon, were evaluated in the Sistan region, using emergy and economic indicators. The research data was collected via questionnaires and field measurements from 45farms for gandak, 53farms for sefidak, 37farms for pashmak, 60farms for watermelon, and 82 farms for melon.The total supporting emergy of gandak, sefidak, pashmak, watermelon, and melon production systems were estimated as 5.83×1016, 5.56×1016, 3.45×1016, 6.48×1016, and 5.83×1016 MJ of solar emergy per hectare per year, respectively. the emergy renewability percentage (R%) of the gandak, sefidak, pashmak, watermelon, and melon production systems was calculated as 3.40, 3.57, 5.21, 3.06, and 3.40%, respectively. The higher R% in the pashmak production system compared to other systems is related to the large share of organic fertilizer use. The lowest amount of environmental renewability among the five systems was related to the watermelon system, which shows that in this system, a high percentage of emergy used is dependent on non-renewable environmental resources.The ecological sustainability of the watermelon production system is more than the other studied systems, and the assessments based on the calculation of 13 emergy and economic indicators designate that stopping erosion and reducing the use of chemical fertilizers can be effective in the ecological stability of these systems.

The achievement of sustainable development is contingent upon a holistic strategy that takes into account the ecological, economic, social, and cultural factors specific to each locality. The safeguarding of renewable natural resources serves as a crucial foundation for enhancing the standard of living for human beings. The objective of this study was to assess the ecological sustainability of the ecosystems present in the Khosroshirin Abadeh watershed. The present investigation employed two techniques, namely the International Union for Conservation of Nature (IUCN) methods and the guidelines of the Organization of Natural Resources and Watershed Management. The initial approach involved partitioning the domain into five distinct sub-domains, followed by an assessment of its sustainability based on three criteria, 10 indicators, and 26 variables within the ecosystem sustainability category. Additionally, two criteria, six indicators, and 16 variables were utilized to evaluate human welfare within the domain. The mean value of the chosen metrics within the domains of ecosystem and human welfare were determined to be 61.8 and 47.2, correspondingly. The stability barometer analysis indicates that the ecosystems under investigation are currently exhibiting moderate levels of stability. The second approach involved an assessment of the rangeland ecosystem and economic and social issues based on the Natural Resources and Watershed Organization's guidelines. The evaluation of the rangeland ecosystem section involved the consideration of 3 criteria, 9 indicators, and 14 variables. On the other hand, the economic and social issues was evaluated based on 5 criteria and 16 indicators, which served as variables. The present approach involved the computation of a final score of 46 for the rangland ecosystem and a final score of 36 for the human welfare human ecosystem. A value of 2.2 was obtained based on the analysis of the 16 selected variables. The score estimation matrix table was utilized to derive a total score of 5.5 for both rangland ecosystems and human welfare. The sustainability assessment table indicates that the Khosroshirin basin's ecosystem is currently in a state of weak sustainability, according to the assigned score. Enhancing the existing livestock and plant composition indicators, along with promoting sustainability of the ecosystem and ensuring ownership, justice, equality, nutrition, and food security in the human ecosystem, can lead to improved living standards of the watershed inhabitants and foster better health and sustainability of the ecosystems in question.

Lake Urmia is one of the most important and valuable Iranian ecosystems. Given that a large population of East Azarbaijan residents in the Urmia Lake Basin is engaged in agricultural business, and the economy of the region and residents of this region depend on the sustainability of agricultural systems in the present and future, hence the study of the sustainability of the agricultural ecosystems of this region are very important.

This paper examines the sustainability of the agricultural ecosystems of Azarshahr in the period of 2004-2017. The weight of the indicators was determined using entropy method and other information was collected from Jihad-e-Agriculture Organization, Regional Water Organization and the yearbooks of East Azarbaijan province during the studied years.

The results of the study showed that the level of stability at the beginning of the period was decreasing during the years 2004-2006 and after a temporary increase in the years 2006-2013, it was reduced again and the conditions of sustainability deteriorated.

Given the results of weighting the indices and calculating the sustainability level, the important role of the factors of sustainability, especially the use of chemical inputs, was shown on the sustainability.