نشریه علمی - پژوهشی مرتع و آبخیزداری

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده منابع طبیعی و علوم زمین، دانشگاه شهرکرد، شهرکرد، ایران

2 دانشکده منابع طبیعی و علوم زمین دانشگاه شهرکرد، شهرکرد، ایران

3 گروه علوم مرتع، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران

10.22059/jrwm.2023.352719.1690

چکیده

تغییر اقلیم یکی از عوامل تعیین‌کننده اصلی در توزیع مجدد گونه‌ها و از دست دادن تنوع زیستی است. این مطالعه با هدف پیش‌بینی اثر تغییر اقلیم بر پراکنش جغرافیایی گونه علف گندمی (Agropyron intermedium) در کل استان چهارمحال و بختیاری واقع در زاگرس مرکزی صورت گرفت. نقاط حضورگونه مورد مطالعه بر اساس بازدیدهای میدانی در منطقه مورد مطالعه برداشت شدند. در این مطالعه، از یک رویکرد مدل‌سازی اجماعی با تلفیق پنج مدل توزیع گونه‌ای استفاده شد. پیش‌بینی پراکنش آینده گونه مورد مطالعه بر اساس سه سناریوی SSP126، SSP370، SSP585 و دو مدل گردش عمومی GFDL-ESM4 و MRI-ESM2-0 برای سال 2070 میلادی انجام شد. بر اساس نتایج ارزیابی‌ها، مدل‌های جنگل تصادفی و افزایشی تعمیم‌یافته به عنوان قابل‌اعتمادترین مدل‌ها برای پیش‌بینی پراکنش گونه‌های مورد مطالعه تعیین شدند. مؤثرترین متغیرها در مطلوبیت رویشگاه گونه علف گندمی، به ترتیب دامنه ارتفاعی، مجموع بارندگی پربارش ترین ماه، شیب و تغییرات فصلی دما بودند. بر اساس نتایج مطالعه، سطح رویشگاه مطلوب گونه‌ علف گندمی، 21/26 درصد از کل منطقه مورد مطالعه برآورد شد. یافته‌ها نشان داد رویشگاه مناسب گونه علف گندمی تحت مدل گردش عمومی GFDL-ESM4 06/36 تا 20/63 درصد و بر اساس مدل ESM2-MRI 69/36 تا 17/65 درصد کاهش خواهد یافت. همچنین نتایج نشان داد که تغییر اقلیم، محدوده پراکنش گونه مطالعه شده را تغییر خواهد داد و احتمالاً در آینده به سمت ارتفاعات بالاتر جابجا خواهد شد. نتایج مطالعه حاضر می‌تواند به منظور حفاظت از رویشگاه این گونه مرتعی و همچنین مکان یابی و احیا آن به کار روند.

کلیدواژه‌ها

عنوان مقاله [English]

Predicting potential climate change effects on the geographical range of Agropyron intermedium L. in Chaharmahal-va-Bakhtiari province

نویسندگان [English]

  • Fereshteh Babaei 1
  • Ataollah Ebrahimi 1
  • Ali Asghar Naghipour 2
  • Maryam Haidarian 3

1 Faculty of Natural Resources and Earth Science, Shahrekord University, Shahrekord, Iran

2 Faculty of Natural Resources and Earth Sciences, Shahrekord University, Shahrekord, I.R. Iran

3 Faculty of Natural Resources, Sari Agricultural Sciences and Natural Resources University, Sari, Iran

چکیده [English]

Climate change is one of the main determinants of plant species redistribution and biodiversity loss. This study aims to predict the impacts of climate change on the geographic distribution of Agropyron intermedium in Chaharmahal-va-Bakhtiari province as a part of Central Zagros, Iran. The presence points of studied species were recorded from our field surveys in the studied area. In this study, we used the ensemble predictions based on five species distribution models. The future projections were made for the year 2070 with three scenarios SSP126, SSP370, and SSP585, and two general circulation models GFDL-ESM4 and MRI-ESM2-0. According to the results, Random forest model and the generalized boosted model were recognized as the most reliable models for predicting species distribution. The most effective variables in the suitability of the A. intermedium species habitat were, respectively, elevation, Precipitation of wettest month, and slope. According to the finding, about 21.26% of the study area for A. intermedium species have had suitable habitats. The decline of suitable habitats of A. intermedium will be 36.06% to 63.20% under the GFDL-ESM4 general circulation model and 36.69% to 65.17% under MRI- ESM2 general circulation model due to climate change. The results also indicated that climate change will alter the range size of studied species and will probably shift to higher elevations in the future. The results of this study can be used to protect the habitat of the range plant species, as well as its rehabilitation and restoration.

کلیدواژه‌ها [English]

  • habitat suitability
  • Central Zagros
  • Ensemble modeling
  • species distribution modeling
  • Biomod2
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