نتایج جستجو برای: hyrcanian area
تعداد نتایج: 584356 فیلتر نتایج به سال:
the oriental arborvitae habitat with an area of 223ha. is located on 20 km south of fazelabad, golestan province. the lowest and highest of its height are 820 and 1680 m.a.s.l. the floristic-physiognomic investigation performed by walked-field procedure at 2nd seasonal sequence showed that flora of this region includes 173 plant species that belong to 147 genera and 65 families, of which 5 sp...
The objective of this study is to develop models based on both optical and L-band Synthetic Aperture Radar (SAR) data for above ground dry biomass (hereafter AGB) estimation in mountain forests. We chose the site of the Loveh forest, a part of the Hyrcanian forest for which previous attempts to estimate AGB have proven difficult. Uncorrected ETM+ data allow a relatively poor AGB estimation, bec...
nowadays, air pollution is a global problem that has had significant growth by technology development, population growth andindustrial development. industrial development brought natural resources deterioration, more manufacturing products, and more environmental pollutants. if pollutant won’t be controlled, human-being and wildlife will face the critical risks. significant release and critical...
یکی از مهم ترین عوامل موثر در وقوع آتش سوزی در مناطق خشک، پوشش گیاهی و شرایط آب و هوایی منطقه می باشد. منطقه حفاظت شده باغ شادی یکی از مناطق جنگلی استان یزد بوده که بیش ترین آتش سوزی های استان در آن رخ داده است. به منظور بررسی عوامل موثر بر وقوع آتش سوزی در این منطقه از روش تحلیل سلسله مراتبی (ahp) استفاده شد و معیارهای فیزیوگرافی شامل سه زیرمعیار ارتفاع، شیب و جهت شیب، اقلیم شامل دو زیرمعیار د...
Iran, a 4-season land in the world, is located in semi-arid part of Asia. There are several geographical climates in this country, which are the main causes for the existence of diverse ecological conditions. In the north, where the Caspian Sea meets the land, there are three provinces. One of these, Guilan province, (the studied area) is located in the southwest of the Caspian with different g...
When forest fires occur, highly complex effects on soil properties and hydrological processes are activated. However, in countries such as Iran, these consequences not widely studied there is a lack of studies. Therefore, the main aim this study was to investigate wildfire quality characteristics representative area located Hyrcanian forests, specifically, Zarrinabad watershed Sari. For purpose...
در این تحقیق از دو گروه تنفسی دهانی (انسداد قدامی و انسداد خلفی بینی) استفاده شد. گروه انسداد خلفی شامل 39 بیمار و با گروه سنی 15-7 سال و متوسط سنی 87/10 سال بود. گروه انسداد قدامی شامل 40 بیمار و با گروه سنی 15-7 و متوسط سنی 97/10 سال بود.رادیوگرافیهای لترال سفالومتری بیماران trace و توسط کامپیوتر و روش دستی، 24 شاخص سفالومتری مورفولوژی صورتی دندانی و فضای بینی حلقی اندازه گیری شده، آزمون ...
We studied the modern pollen rain in two different landscapes from Hyrcanian lowland forests up to slopes of Alborz Mountains Gilan province for first time. Pollen traps were installed one year and moss samples collected along altitudinal transects 100 1800 m 2300 elevations. The results counting environmental DNA barcoding (metabarcoding) compared 32 locations. In total, 81 vascular plant spec...
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