The preparation of vegetation cover maps by used the land inventory and a traditional method has a lot of cost and time. But today, remote sensing is one of the main sources of data collection and information production for study and monitoring land resources, and was efficient tools for providing quickly and timely data and information needs for program planning in the natural resource filed. ...

The geographic distribution of Astragalus (Fabaceae) in Iran was analyzed using a database of 7606 georeferencedobservations. Astragalus occurs in all provinces of Iran, but 88% ofthe observations are in five provinces including Tehran, West-Azerbaijan, Esfahan, Kordestan, and Khorasan-e Razavi.Most species are rare and narrowly endemic: Thelargest distance between two observations of the same ...

سابقه و هدف: جنگل­ های زاگرس به ­عنوان یکی از بوم ­سازگان­ جنگلی مهم ایران پوشش­ گیاهی (درختان، درختچه ­ها گونه­ علفی) متنوعی برخوردار می­ باشد. شناسایی آگاهی دقیق نقش ­شناختی آنها در این ­سازگان تواند حفاظت منابع طبیعی توسعه پایدار کمک شایانی نماید. به‌منظور مطالعه تنوع گونه‌ای گیاهان چوبی ذخیره کربن خاک رابطه با عوامل فیزیوگرافیک (جهت، شیب ارتفاع سطح دریا)، رویشگاه کیکم (var. cinerascens Acer...

early bronze age (eba) in the middle east is considered to be the dawn of civilization, spread of writing, and proto-urbanism; and mesopotamia was the center of these historical events. cultural material remains at the beginning of this period in this vast area – including western iran, caucasus (also beyond), anatolia, levant and northern mesopotamia – have wonderful similarities in spite of d...

amplitudes of seismic waves decrease with distance according to anelastic properties of the earth and geometrical spreading. the attenuation of ground-motion amplitudes in the frequency domain is an important problem in engineering seismology. it is of particular practical interest in the regions such as zagros (iran). the zagros fold- thrust belt, as a part of alpine- himalayan orogenic belt i...

the nw-se trending zagros fold and thrust belt extends for about 1,800 km from a location some 300 km se of the east anatolian fault in ne turkey to the strait of hormuz where the north-south trending zendan-minab-palami fault system (zmp) separates the zagros belt from the makran accretionary prism. the ne limit of the zagros belt is marked by the main zagros reverse fault which is rotated abo...

western and eastern populations of goitered gazelles are separated by zagors mountains as a barrier. bordering iraq, western population has suffered from drastic decline during and after iran-iraq war. presently, there are small numbers of the goitered gazelles left in the region with no clear understanding of their taxonomic status. it has been normally assumed that there should be a differenc...