نتایج جستجو برای: and carbon sequestration prescott et al

تعداد نتایج: 17152165  

Journal: :محیط زیست طبیعی 0
حامد جنیدی جعفری استادیار دانشکدۀ منابع طبیعی دانشگاه کردستان‏ احمد صادقی پور استادیار دانشکدۀ کویر‏شناسی دانشگاه سمنان نادیا کمالی دانشجوی دکتری مرتع‏داری دانشکدۀ منابع طبیعی دانشگاه تهران شیما نیکو استادیار دانشکدۀ کویر‏شناسی دانشگاه سمنان

due to the notable role of different land uses in carbon sequestration and emission, four treatments including rangeland as control, haloxylon plantation area, olea plantation (olive garden), and residential lands, were selected to study the effects of land use change on soil carbon sequestration and emissions in eivanakei rangelands, semnan province. carbon stocks in vegetation and soil of eac...

Examining the economic value of carbon sequestration in forests is essential, given the risk of global climate change, which has posed a profound challenge to societies internationally. The present study investigates the amount of carbon sequestration and its economic value in the oak forests (Quercus brantii L.) of Pahnus forest habitat with an area of 990 ha, located in Chaharmahal va Bakhtia...

Journal: :محیط شناسی 0
مریم صارمی دانش آموختۀ کارشناسی ارشد مرتعداری، گروه مرتع و آبخیزداری، دانشکدۀ منابع طبیعی، دانشگاه زابل عین الله روحی مقدم استادیار، گروه مرتع و آبخیزداری، دانشکدۀ منابع طبیعی، دانشگاه زابل اکبر فخیره دانشیار گروه مرتع و آبخیزداری، دانشکدۀ منابع طبیعی، دانشگاه گنبد

introduction climate change is one of the most important challenges in sustainable development, which has a negative impact on aquatic and terrestrial ecosystems. this will change rainfall patterns the power to increase hurricane and the risk of drought, flood and will strengthen pressure on water resources. researchers generally agree that the main cause of the increase in global temperature i...

Journal: :جنگل و فرآورده های چوب 0
ضیاءالدین باده یان استادیار دانشگاه لرستان معصومه منصوری دانشجوی دکترا دانشگاه لرستان محبوبه فسحت دانشجوی کارشناسی ارشد دانشگاه تربیت مدرس محمد علی فخاری کارشناس ارشد سازمان جنگلها، مراتع و آبخیزداری کشور. سید محسن حسینی دانشیار دانشکده منابع طبیعی و علوم دریایی دانشگاه تربیت مدرس، پردیس نور

forest ecosystems and their optimal management can play effective roles in mitigating the carbon emission as well as absorbing the atmospheric carbon. the present research was carried out to determine the effects of 21 year old stands of cryptomeria japonica, cupressus sempervirens, pinus taeda, acer pseudo-platanu and mixed plantation and natural forest stands on sequestration of carbon in the...

2009
Johannes Lehmann

What concentrations of atmospheric carbon dioxide should we not exceed, what is a safe level? The opinions necessarily diverge. But the stakes are high and probably we are well advised to shoot for a lower value (Schneider 2009) since dangerous climate change and irreversible consequences have graduated from a possibility to a near certainty (Solomon et al. 2009). If 350 ppm should be our targe...

Journal: :محیط شناسی 0
رضا تمرتاش مربی دانشگاه علوم کشاورزی و منابع طبیعی ساری محمدرضا طاطیان استادیار دانشگاه علوم کشاورزی و منابع طبیعی ساری مائده یوسفیان دانشجوی کارشناسی ارشد مرتع داری، دانشگاه آزاد اسلامی واحد نور

carbon sequestration in soil and plant biomass is the most simple and economic way for co2 decrease that is important in environment improvement. this research was done in miankaleh region of behshahr in mazandaran for comparison of carbon sequestration in different plant types. firstly, plant types were determined and dominant species was identified in each type. number and size of plots was o...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه زنجان 1390

1-1- اهمیت روغن خوراکی روغن گیاهی جایگاه ویژه ای در سبد غذایی خانوار دارد. علی رغم سرانه بالای مصرف این محصول در کشور، میزان وابستگی کشور به واردات روغن خوراکی در سال 1384، 85% بوده و در سال 1387 این مقدار به 75% رسیده که هنوز آمار نگران کننده ای است (2 و 4). بر اساس آمار سازمان خوار و بار جهانی (f.a.o.) درباره تولید دانه های روغنی در ایران و واردات روغن در کشور، میزان واردات دانه های روغنی از...

Journal: Desert 2014

Arid and semi-arid lands cover around one-third of the world's terrestrial expanse and their widespread plantdistributions provide these areas with a high potential for sequestering carbon. Vegetation management for developingshrub or tree species in arid and semi-arid regions is one inexpensive and multi-purpose approach for decreasing CO2.This study assessed the potential of carbon sequestrat...

Mohsen Esmaili Seyedeh Khadijeh Mahdavi,

Climate changes and global warming are considered as very important challenges of sustainable development. Carbon sequestration is the easiest and cheapest way to reduce the greenhouse gases, especially carbon which constitutes the largest portion of them. In the present study, the potential of carbon sequestration in four plant species of Atriplex canescens, Haloxylon persicum, Artemisia siebe...

Journal: :desert 2014
hamidreza naseri

arid and semi-arid lands cover around one-third of the world's terrestrial expanse and their widespread plantdistributions provide these areas with a high potential for sequestering carbon. vegetation management for developingshrub or tree species in arid and semi-arid regions is one inexpensive and multi-purpose approach for decreasing co2.this study assessed the potential of carbon sequestrat...

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