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تعیین مؤثرترین عوامل اقلیمی و خاکشناسی بر وضعیت پوشش گیاهی مراتع استان اصفهان | ||
| تحقیقات مرتع و بیابان ایران | ||
| مقاله 7، دوره 27، شماره 3 - شماره پیاپی 80، مهر 1399، صفحه 463-484 اصل مقاله (1.22 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/ijrdr.2020.126906.1871 | ||
| نویسندگان | ||
| لیلا بخشنده مهر1؛ محمد رضا یزدانی* 2؛ رضا جعفری3؛ سعید سلطانی4 | ||
| 1دانشجوی دکتری بیابانزدایی، گروه بیابانزدایی، دانشکده کویرشناسی، دانشگاه سمنان. | ||
| 2دانشیار گروه بیابانزدایی، دانشکده کویرشناسی، دانشگاه سمنان. | ||
| 3دانشیار گروه مرتع و آبخیزداری، دانشکده منابع طبیعی، دانشگاه صنعتی اصفهان | ||
| 4استاد گروه مرتع و آبخیزداری، دانشکده منابع طبیعی، دانشگاه صنعتی اصفهان | ||
| چکیده | ||
| پژوهش بر روی کنترلگرهای محیطی در جوامع گیاهی، یکی از زمینههای تحقیقاتی برای بسیاری از اکولوژیستهاست. شناسایی عوامل مؤثر بر پوشش گیاهی مناطق خشک، اولین گام در جهت شناسایی عوامل مخرب و موانع رشد و گسترش پوشش گیاهیست. در این پژوهش با استفاده از روش مدلسازی معادلات ساختاری و تکنیک حداقل مربعات جزئی (PLS-SEM) متغیرهای اقلیمی و خاکشناسی مؤثر بر پوشش گیاهی درمنهزارهای استپی استان اصفهان شناسایی و مدلسازی شد. طبق نتایج، درصد رس خاک، حداکثر ارتفاع هرزآب بر روی خاک، درجه حرارت و خشکی محیط از عوامل خاکشناسی و اقلیمی مؤثر بر میزان تولید و پوشش گیاهی در مکانهای مورد مطالعه میباشند. ضمن اینکه، نقش عوامل اقلیمی نسبت به عوامل خاکشناسی در پراکنش پوشش گیاهی منطقه بیشتر است. مدل ارائه شده در این پژوهش، دارای دقت مناسب و قابلیت انعطافپذیری بالا برای مدلسازی پدیدههای اکولوژیک میباشد. | ||
| کلیدواژهها | ||
| پوشش گیاهی؛ حداقل مربعات جزئی؛ مدلسازی معادلات ساختاری؛ روایی؛ پایایی | ||
| عنوان مقاله [English] | ||
| Determining the most effective climatic and pedological factors on the vegetation status in rangeland of Isfahan Province | ||
| نویسندگان [English] | ||
| Leila Bakhshandehmehr1؛ Mohammadreza Yazdani2؛ Reza Jafari3؛ Saeid Soltani4 | ||
| 1Phd Candidate of desertification Combating, Department of Desert Studies, Semnan University | ||
| 2Associate Professor at, Department of Desert Studies, Semnan University | ||
| 3Associate Professor at Department of Natural Resources, Isfahan University of Technology | ||
| 4Professor at Department of Natural Resources, Isfahan University of Technology | ||
| چکیده [English] | ||
| Research on the environmental controllers in plant communities is one of the research fields for many ecologists. Identifying the factors affecting the vegetation cover in the arid regions is the first step to recognize the destructive factors, which inhibit the growth and development of vegetation. In the current study, using the structural equation modeling method and Partial Least Square – Structural Equation Modeling (PLS-SEM), climatic and pedological variables that affecting the vegetation cover in steppe rangelands of Zayandehrood basin of Isfahan province were identified and modeled. According to the results, soil clay content, maximum runoff height on the soil, temperature, and dryness of the environment are the most important variables affecting the quantity and quality of vegetation in the rangelands of the Zayandehrud basin. Besides, the role of climatic factors is more than soil factors in the distribution of vegetation in the region. The model presented in this research has good accuracy and high flexibility for modeling ecological phenomena. | ||
| کلیدواژهها [English] | ||
| Vegetation cover, Partial least square, Structutal equation modeling, Validity, Reliability | ||
| مراجع | ||
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