نتایج جستجو برای: in protected area

تعداد نتایج: 17020089  

Protected areas have emerged as one of the most important and effective tools in the world for biodiversity conservation. Changing the use of natural lands, especially rangelands to protected areas, causes livestock grazing to be restricted in some of the grazing lands. These restrictions cause conflict between different natural land stakeholders. This study investigates the grazing management ...

Journal: :journal of rangeland science 2014
negin nodehi mousa akbarlou adel sepehry hasan vahid

abstract. the purpose of this study was to investigate the effects of topographical factors on the classification of grassland plant communities in the rangelands of ghorkhud, northern khorasan province, iran. for sampling, land units were specified. a floristic list was prepared using minimal area method based on the nested plot (braun-blanquet method). 116 10m2 furrows were selected. within e...

Journal: :محیط زیست طبیعی 0
مریم کبیری هندی کارشناس ارشد محیط زیست دانشکدة منابع طبیعی، دانشگاه تهران افشین دانه کار دانشیار دانشکدۀ منابع طبیعی، دانشگاه تهران افشین علیزاده استادیار دانشکدۀ منابع طبیعی، دانشگاه تهران نعمت اله خراسانی 4. استاد دانشکدۀ منابع طبیعی، دانشگاه تهران

natural sites with spiritual values are parts of land or sea that play key role in conserving biodiversity and cultural identity. the aim of this study is prioritizing protected zones with spiritual values. in the first step for this survey, based on literature review and according to multi criteria assessment, convenient conservation criteria were compiled, then for each of criterion, indices ...

ابراهیمی, سپیده سادات, پوربابائی, حسن ,

Spatial patterns are suitable tools for optimal management in many forested areas. In this research, the effect of conservation on spatial pattern of dominant trees has been studied. To achieving this purpose, protected and non- protected forests were selected in Masal region of Guilan province as the study area. Sampling methods including fixed- area plots and distance methods, such as T- squa...

Journal: :محیط زیست طبیعی 0
بهروز بهروزی راد عضو هیأت علمی واحد علوم تحقیقات اهواز، گروه محیط زیست، ایران بهرام حسن زاده کیابی دانشیار زیست شناسی، دانشکده علوم، دانشگاه شهید بهشتی، ایران حسن اکبری کارشناس ارشد محیط زیست، کارشناس اداره کل حفاظت محیط زیست استان یزد، ایران

the group size and behavior of goitered gazelle was studied over the year 2001 in kalmand-bahadoran protected area. gazelle groups showed no stable organization in kalmand protected area. in spring season, group size was smaller than other seasons and the largest groups were seen in winter. number of solitary gazelles increased during the mating season. adult males were territorial in mating se...

Journal: :زیست شناسی جانوری تجربی 0

abstract caracal (caracal caracal) is a species of felidae which has a vast distribution in the central area ofiran. in this study, we gathered all records of caracal in yazd province during nine years (2002-2011). we also analyzed the results of intensive camera-trapping in 3 protected areas inyazd province. based on the results of the study 96 records of caracal were obtained in the study are...

Journal: :محیط زیست طبیعی 0
فرهاد عطایی کارشناس ارشد زیستگاه ها و تنوع زیستی، دانشکده محیط زیست و انرژی، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات تهران، ایران محمود کرمی استاد گروه محیط زیست، دانشکده محیط زیست و انرژی، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات تهران، ایران محمد کابلی استادیار گروه محیط زیست، دانشکده منابع طبیعی، دانشگاه تهران، ایران

brown bear (ursus arctos) is one of the most important carnivores in iran. however, information on its habitat associations is scared. based on ecological niche factor analysis (enfa) method, a summer habitat suitability model was developed for this species in the southern part of alborz protected area. our results showed that, brown bears prefer higher altitudes and northern aspects in their p...

Journal: :global journal of environmental science and management 2016
a. padash s.a. jozi s.m.b. nabavi b. dehzad

in recent decades, necessity to protect environment has been a serious concern for all people and international communities. in appropriate development of human economic activities, subsistence dependence of the growing world population on nature decreases the natural diversity of ecosystems and habitats day by day and provides additional constraints for life and survival of wildlife. as a resu...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه امام رضا علیه السلام - دانشکده زبانهای خارجی 1393

writing an academic article requires the researchers to provide support for their works by learning how to cite the works of others. various studies regarding the analysis of citation in m.a theses have been done, while little work has been done on comparison of citations among elt scopus journal articles, and so the dearth of research in this area demands for further investigation into citatio...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید