نتایج جستجو برای: species diversity.

تعداد نتایج: 692837  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده منابع طبیعی و علوم دریایی 1388

this research was conducted in two protect and destroy region in the middle zagros, in illam province. in order to identification of ecological species group and evaluate density of regeneration, effect of many factors such as protection, vegetation, physiographic factors, physical and chemical properties of soil in study locations were studied. to achieve these purpose number of 54 plots using...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده کشاورزی 1388

چکیده به منظور بررسی اثر تنوع گیاهی و نوع منبع تغذیه ای بر تنوع و تراکم علفهای هرز و حشرات، کارایی مصرف نهاده ها ( نور، آب، عناصر غذایی) و عملکرد و خصوصیات کیفی چند گونه زراعی، آزمایشی به صورت کرتهای خردشده بر پایه طرح بلوکهای کامل تصادفی با سه تکرار در دو سال زراعی 1385-1384 و 1386-1385 در مزرعه تحقیقاتی دانشکده کشاورزی دانشگاه فردوسی مشهد به اجرا درآمد. تیمارهای مورد بررسی دو منبع کود دامی و...

Journal: :international journal of environmental research 0

gradual decrease of biodiversity related to the rapid industrialization and urbanization is stimulating the fundamental research towards a better understanding of the relationships between biodiversity and ecosystem functioning. present study emphasizes the nature and status of floral diversity in the vicinity of integrated industrial estate-pantnagar, uttarakhand, india (iie-pantnagar).three m...

2018
Benjamin E. Wolfe

As troves of microbiome sequencing data provide improved resolution of patterns of microbial diversity, new approaches are needed to understand what controls these patterns. Many microbial ecologists are using cultivated model microbial communities to address this challenge. These systems provide opportunities to identify drivers of microbiome assembly, but key challenges and limitations need t...

Journal: :iranian journal of ichthyology 0
hamid reza esmaeili ichthyology and molecular systematics laboratory, department of biology, college of sciences, shiraz university, shiraz, iran. hamidreza mehraban ichthyology and molecular systematics research laboratory, zoology section, department of biology, college of sciences, shiraz university, shiraz, iran keivan abbasi inland waters aquaculture research center. iranian fisheries sciences research institute. agricultural research, education and extension organization, bandar anzali, iran yazdan keivany department of natural resources (fisheries division), isfahan university of technology, isfahan, 4156-83111, iran. brian w coad canadian museum of nature, ottawa, ontario, k1p 6p4 canada.

this checklist aims to reviews and summarize the results of the systematic and zoogeographical research on the iranian inland ichthyofauna that has been carried out for more than 200 years. since the work of j.j. heckel (1846-1849), the number of valid species has increased significantly and the systematic status of many of the species has changed, and reorganization and updating of the publish...

Journal: :journal of rangeland science 2013
ali mahdavi javad eshaghi rad mojtaba jamshidifard

recognizing the herbaceous plant species diversity could use as an importantindicator applied for the rangeland and forests management. considering the presence ofvegetation and animal husbandry in zagros region, iran, being aware of the diversity andrichness of plant species is necessary to management or the destructed vegetationrestoration. in order to study the effect of aspect and elevation...

Journal: :molecular biology research communications 0
muhammad irfan biotechnology research laboratory, shenyang academy of agricultural sciences, shenyang liaoning, china shuang yang biotechnology research laboratory, shenyang academy of agricultural sciences, shenyang liaoning, china luo yuxin biotechnology research laboratory, shenyang academy of agricultural sciences, shenyang liaoning, china jia-xing sun biotechnology research laboratory, shenyang academy of agricultural sciences, shenyang liaoning, china

this study investigated the genetic diversity of morchella species using randomly amplified polymorphic dna markers. morchella species are an important group of edible mushrooms belonging to the family helveliaceae with medicinal and economical significance. in this study we have developed an efficient method of genomic dna isolation which was amplified by eight rapd primers to test the polymor...

Journal: :international journal of advanced biological and biomedical research 2013
rohollah parma shaban shataee

the use of remote sensing techniques as a suitable solution to estimate the levels of species diversity is of high importance for the sustainable management of forests. in order to investigate the potential of using sensor data from landsat 7 etm+ to estimate species diversity in the zagros forests, digital data related to the august 7, 2002 from forests in the qalajeh kermanshah province were ...

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...

Gonabad located at Khorasan Razavi and coordinates 580 30’ N 34o 35’ E. The highest point of the zone belongs to Peak of Siah Mountain (height of 2,863 meters above sea level) and the lowest place has height of 810 meters above sea level, which is located in North West in salt desert. The mean temperature of the warmest and coldest of year is 29.3 and 3.9 respectively. Mor...

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