نتایج جستجو برای: species forests are recommended the species diversity

تعداد نتایج: 16308767  

Bita Tangestani, Mani Arman, Parviz Bavarsad,

Moist and temperate Caspian forests are associated with a diversity of soil types and topography.  Although, natural history and ecological attributes of the Caspian vegetation is well-documented, little is known about mycorrhizae of the Caspian (Hyrcanian) flora. Samples of herbaceous plant species were collected from 4 pre-determined altitudes (-13 upto about 1500m above sea level, appro...

Zagros forests are one of the important natural ecosystems in Iran with high plant diversity and variety of plant communities. In recent decades, fire events have frequently occurred in some of these ecosystems. The purpose of this research is to investigate the composition and diversity of herbaceous species after nine years of fire occurrence in the forests of Zagros in western Iran. For this...

Journal: :حفاظت گیاهان 0
محمود مهرافروز مایوان معصومه شایان مهر

the present study was carried out during a one year period in 2012-2013 in order to investigation of seasonal density and diversity of diplopoda in a hyrcanian forest (semeskandeh forest) in northern iran. for these purpose, some forest soil sampling were done in two mounth intervals and the samples were collected from leaf litter (ol,f,h), the 0-3 cm and 3-6 cm of soil layer (ah). a total of 7...

Journal: Mycologia Iranica 2019

Polypore fungi are an important group of wood-inhabiting basidiomycetes that have significant roles in biomass recycling in forests and woodland ecosystems. Figures on the polypore diversity in Iran have been partly made available through few checklists, but there have been no comparative studies on the pattern of geographic distribution of the species. The prevalence of the Mediterranean biocl...

Journal: :دانش گیاه پزشکی ایران 0
حامد غباری دانشجوی سابق دکتری حشره شناسی پردیس کشاورزی و منابع طبیعی دانشگاه تهران و استادیار دانشگاه شهر جاماسب نوذری استادیار، پردیس کشاورزی و منابع طبیعی دانشگاه تهران حسین الهیاری دانشیار، پردیس کشاورزی و منابع طبیعی دانشگاه تهران مارک کالاشیان استاد انستیتوی جانورشناسی ارمنستان

buprestid beetles are one of the important components of the biodiversity of forest ecosystem in kurdistan province. different characteristics of biodiversity of buprestid beetles were studied by use of window trap, colored pan and colored sticky trap in these forests during 2009 and 2010. a total of 1205 specimens of 44 species were caught by use of considered traps during appearance of adults...

The main purpose of this study is to investigate the quantitative and qualitative characteristics of dominant tree species and their regeneration status in the Arasbaran forests. Data were collected by transect sampling and regeneration was assessed by plot with an area 100 m2. In the sample plots, we recorded information on species type, diameter at breast height, height, quality of seedlings ...

A. Shirvany E. Nazerian H. Abdul-Hamid H.R. Naji M. Matinizadeh M. Moradi V. Etemad

This study aimed to investigate the diversity and types of arbuscular mycorrhizal fungi (AMF) associated with the wild service tree, Sorbus torminalis (L.) Crantz in spring and autumn followed by identifying similarities among the different study sites. Three different sites were selected including Kheiroud, Lalis, and Tarkin, in the Hyrcanian forests, north of Iran. Five rhizosphere soil sampl...

Journal: :international journal of advanced biological and biomedical research 2013
hamid ahani hamid jalilvand

forests are biologically diverse systems, representing some of the richest biological areas on earth. they offer a variety of habitats for plants, animals and micro-organisms. however, forest biodiversity is increasingly threatened as a result of deforestation, fragmentation, climate change and other stressors. biodiversity is the variation of life forms within a given ecosystem, biome, or on t...

Journal: :محیط زیست طبیعی 0
منصوره ملکیان گروه محیط زیست دانشکدۀ منابع طبیعی، دانشگاه صنعتی اصفهان راحله باقری کارشناس محیط زیست استان کهگیلویه و بویراحمد

investigating species diversity and richness is essential for defining conservation priorities. in addition, determining landscape parameters influencing species diversity and richness is important for selecting and designing parks and protected areas. kohgiluyeh & boyer ahmad province is a mountainous region, comprises hills, mounds, forests and plains. this vast province has high species dive...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علوم کشاورزی و منابع طبیعی گرگان - دانشکده کشاورزی 1391

چکیده مورچه‏ها با حمایت از شپشک‏ها در مقابل دشمنان طبیعی، می‏توانند برنامه‏های کنترل بیولوژیک آن‏ها را مختل ‏نمایند. طی سال‏های 1389 و 1390 با نمونه‏برداری از باغات مرکبات شهرستان‏های ساری و بهشهر، فون و فراوانی نسبی مورچه‏هایِ همراه با شپشک‏ها مورد مطالعه قرار گرفت. همچنین، تاثیر تراکم‏های مختلف کاست کارگر گونه‏ی santschi lasius turcicus بر میزان تغذیه و فراسنجه‏های واکنش تابعی حشرات ماده و لا...

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