بررسی اثر تخریب جنگل های هیرکانی استان گلستان در افزایش انتشار گازهای گلخانه ای

نوع مقاله : مقاله پژوهشی

نویسندگان

1 نویسنده مسئول، استادیار، گروه محیط‌زیست، دانشکده شیلات و محیط‌زیست، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گلستان، ایران

2 استادیار، گروه شیلات و محیط‌زیست، دانشکده کشاورزی و منابع طبیعی، دانشگاه لرستان، خرم‌آباد، ایران

چکیده

اکوسیستم‌های جنگلی خدمات متنوع اکوسیستمی را فراهم می‌کنند که برای پایداری زیستی و حفظ پیچیدگی اکوسیستم‌ها مهم هستند. یکی از مهمترین خدمات اکوسیستمی جنگل، تعدیل اقلیم است. از یک سو، کربن از طریق رشد درختان در منابع جنگلی ذخیره می‌شود و از طرف دیگر، فعالیت‌های تغییر کاربری/پوشش زمین باعث تاثیر بر این ذخایر کربن می‌شود. به دلیل اثرات جنگل‌زدایی هیرکانی، در این مطالعه به بررسی اثرات تخریب جنگل بر انتشار گازهای گلخانه‌ای در استان گلستان بر اساس برنامه REDD پرداخته شده است. چهار منبع ذخیره کربن شامل کربن روزمینی، زیرزمینی، لاشبرگ و کربن آلی خاک با مرور 31 مطالعه داخلی و گزارش IPCC استخراج گردید. برای پیش‌بینی میزان تخریب جنگل تا سال 1427 در سناریوی پایه REDD، زنجیره مارکوف استفاده شد. در سناریوی پایه، انتشار گاز دی‌اکسید کربن تا سال 1427 معادل 43655427 تن برآورد گردید. تبدیل جنگل به سایر کاربری‌ها در اثر آتش‌سوزی منبع مهم انتشار گازهای گلخانه‌ای مانند CH4 وN2O است. اطلاعات آتش‌سوزی در استان گلستان نشان‌دهنده وقوع 1511 فقره آتش‌سوزی از سال 1390 تا 1397 است، نتایج نشان داد که انتشار گازهای گلخانه‌ای در اثر آتش‌سوزی نیز 51/16083 تن معادل دی‌اکسید کربن برآورد گردید. بالاترین میزان انتشار گاز دی‌اکسید کربن معادل 17 میلیون تن در شهرستان مراوه تپه است. نتایج این مطالعه نشان داد که جنگل‌های هیرکانی نقش مهمی در کاهش انتشار گازهای گلخانه‌ای دارد.

کلیدواژه‌ها


عنوان مقاله [English]

A study on the effects of Hyrcanian deforestation on greenhouse gases emission in Golestan Province

نویسندگان [English]

  • Hamidreza Kamyab 1
  • Zahra Asadolahi 2
1 Gorgan University of Agricultural Sciences and Natural Resources
2 Lorestan University
چکیده [English]

Forest ecosystems provide a wide range of multiple ecosystem services (ESs) that are important for sustaining life on earth and maintaining the integrity of the ecosystems. One of the most important forest ESs is climate regulation. On one hand, carbon accumulates through growth of trees into forest growing stock. On the other hand, Land use/land cover (LULC) change activities impact carbon stocks. Because of the ongoing Hyrcanian deforestation, we focused on how different LU change affect GHGs emissions in Golestan province based on REDD project. Four carbon pools include above-ground, below-ground, litter and soil organic carbon provided by the results of reviewing 31 internal studies and IPCC reports. For projection of 2047 year deforestation under the baseline scenario, the Markov Chain was used. With the implementation of the base scenario, the CO2 emission was estimated at 43655472 tons by 2047. The conversion of forests to other LULC types by fire is an important source of other GHGs emissions such as CH4 and N2O. Forest fire information of Golestan province shows that since the year 2011 to 2018, 1511 fires have occurred. The results showed that fire would emitted 16083.51 tCO2e GHGs (CH4 and N2O) by the year 2047. The highest emission rates of CO2 equal to 17 million tons occurred in Marave-Tappeh township. The results shows the important role of Hyrcanian forests in reducing GHGs emission.

کلیدواژه‌ها [English]

  • Deforestation
  • GHGs emission
  • REDD
  • Fire
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