نتایج جستجو برای: diversity coefficient index

تعداد نتایج: 731304  

Journal: :Forests 2022

Forests experience disturbances, such as fire, that affect their functioning, structure, and species composition. The objective of this work was to compare the diversity forest structure at sites affected by different degrees fire severity, 9 years after a event. We used differenced Normalized Burn Ratio (dNBR) index. Vegetation sampled in three severity levels: high (HS), moderate (MS), low (L...

Journal: :جنگل و فرآورده های چوب 0
علی اشرف مهرابی عضو هیأت علمی دانشکده کشاورزی و منابع طبیعی دانشگاه ایلام پیمان غلامی دانشگاه آزاد اسلامی واحد کرمانشاه علیرضا اطمینان استادیار اصلاح نباتات، دانشگاه آزاد اسلامی واحد کرمانشاه، دانشکده دانشکده تحصیلات تکمیلی سمیرا محمدی دانشکده کشاورزی و منابع طبیعی دانشگاه ایلام

pistacia atlantica subsp. mutica is one of the most valuable forest tree species in iran that has been severely exploited for a long time. therefore, understanding the genetic diversity of different populations can be an important step towards the development and restoration of the habitat of this invaluable tree species. in this study, in order to study the genetic diversity, 10 populations in...

Akbarzadeh, Kamran, Dehghan, Omid , Enayati, Ahmadali , Eslamifar, Masoumeh , Fazeli Dinan, Mahmoud, Jafari, Ali , Jafari, Fatemeh, Motevalli Haghi, Farzad, Nikookar, Seyed Hassan , Sheikhi, Masoomeh, Yazdani-Cherati, Jamshid ,

Background and purpose: Flies have a high diversity and are able to transmit many pathogens due to their adaptation and close relationship with humans. Therefore, this study was performed to identify the fauna of medically important flies in the city of Joybar in northern Iran. Materials and methods: This descriptive-analytical study was conducted twice a month in Juybar at selected sites, inc...

Journal: :Brazilian journal of biology = Revista brasleira de biologia 2013
R A Luz L S Fontes S R S Cardoso E F B Lima

The soil fauna plays an important function over the processes of organic matter decomposition, nutrient cycling, ground aeration and fertility. Thus, studies on the composition and structure of such communities are important, considering moreover the lack of information in different regions of Brazil and mainly related to the state of Piauí. This study aimed to evaluate the density and diversit...

Journal: :علوم گیاهان زراعی ایران 0
مهسا غفاری دانشجوی سابق ارشد شاهین واعظی موسسه تحقیقات اصلاح وتهیه نهال وبذر،عضوهیئت علمی ، دکتری اصلاح نباتات

in order to study genetic diversity in 178 accessions of lentil (lens culinaris medik) originated from warm climate regions of iran, this experiment was conducted in 2009 at research farm of the national plant gene bank of iran in karaj. experimental design was an augmented experiment with six blocks and each block containes 30 accessions. accessions were compared with promising lines including...

Journal: :gene, cell and tissue 0
fatemeh rostami department of plant protection, zabol university, zabol, ir iran; department of plant protection, zabol university, zabol, ir iran. tel: +98-09153524964, fax: +98-5422240696 fatemeh khosravi moghaddam department of plant protection, zabol university, zabol, ir iran seyed kazem sabbagh department of plant protection, zabol university, zabol, ir iran saeide saeidi department of biology, science and research branch, islamic azad university, kerman, ir iran; department of biology, science and research branch, islamic azad university, kerman, ir iran. tel: +98-9153495398, fax: +98-5422240696

conclusions this is the first research in comparing two genetic marker systems in p. variotti. we were prompted to explore polymorphisms utility in p. variotti with a look at using germplasm screening mapping of genome and strain improvement programs. results both systems discriminated 20 isolates of p. variotii successfully but were different in the amount of detectable polymorphism. using clu...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید