نتایج جستجو برای: index species

تعداد نتایج: 931450  

Journal: :global journal of environmental science and management 0
d. sivakumar department of civil engineering, vel tech high tech dr.rangarajan dr.sakunthala engineering college, avadi, chennai 600062, tamil nadu, india

the isolated fungi species of different kinds from chromium contaminated soil sites located in nagalkeni, chennai were used for reducing chromium(vi) in a tannery industry wastewater of nagalkeni, chennai.  the experiments were conducted to know biosorption potential of isolated fungi species for removing chromium(vi) in a tannery industry wastewater against the different ph, fungi biomass and ...

Journal: :تاکسونومی و بیوسیستماتیک 0
سید غلامعلی جلالی حامد اسدی امید اسماعیل زاده اعظم نورایی حامد اسدی

the purpose of this study was the introduction of seed accumulation index as a new approach in the evaluation of soil seed bank consistency in the populus caspica in noor reserved forest park. sampling were made above ground vegetation at peak vegetation cover during june 2010 by systematic- selective method. soil samples were collected during late june, late november and early february by hamm...

Journal: :شیلات 0
سپیده سلیمانی پی کارشناس ارشد زیست شناسی دریا، دانشگاه علوم و فنون دریایی خرمشهر نسرین سخایی استادیار گروه زیست شناسی دریا، دانشکدة علوم دریایی و اقیانوسی، دانشگاه علوم و فنون دریایی خرمشهر سیمین دهقان مدیسه استادیار پژوهشکدة آبزی پروری جنوب کشور احمد سواری استاد گروه زیست شناسی دریا، دانشکدة علوم دریایی و اقیانوسی، دانشگاه علوم و فنون دریایی خرمشهر محمدعلی سالاری استادیار گروه زیست شناسی دریا، دانشکدة علوم دریایی و اقیانوسی، دانشگاه علوم و فنون دریایی خرمشهر

the aim of this investigation was to study the planktonic shrimp-like communities density and diversity in artificial reefs of khuzestan coasts, bahrakan waters (the persian gulf). sampling was conducted for one year from may 2011 to april 2012, monthly. zooplankton were collected with plankton tows using 300 μm mesh net. totally, two superfamily, penaeoidea, sergestoidea and one suborder carid...

Journal: :بوم شناسی کشاورزی 0
لیلا تبریزی پروین امینی کردکندی کورس خوشبخت

in order to investigate biodiversity and production of cultivated medicinal plants in agroecosystems of qazvin province, a study was conducted during year of 2011. interviews were carried out with farmers by using semi-structured questionnaire to obtain information regarding to biodiversity and medicinal plants production systems in main regions under cultivation of medicinal plants including f...

Journal: :بوم شناسی کشاورزی 0
روح اله مرادی مسعود سامی

sustainability of productions in agricultural ecosystems depends on conservation and amplification of biodiversity. this study was conducted to determine the planting area, species richness, species evenness and biodiversity of different agronomical, horticultural and livestock productions in kerman province. for this purpose, information about planting area of agronomical and horticultural pla...

Journal: :مرتع و آبخیزداری 0
ولی الله رئوفی راد دانشجوی کارشناسی ارشد مرتعداری دانشگاه شهرکرد عطاالله ابراهیمی استادیار دانشکدة کشاورزی دانشگاه شهرکرد حسین ارزانی استاد دانشکدة منابع طبیعی دانشگاه تهران زهرا شجاعی اسعدیه استادیار دانشکدة کشاورزی دانشگاه شهرکرد

palatability includes plants physical and chemical property that encourages an animal selecta plant for grazing. this study is an attempt for intruducing an indicator for determining thepalatability of rangeland plants. to do this, the relationship between palatability and foragequality of rangeland plants in karsanak rangelands of the chaharmahal-va-bakhtiari provincewas studied. first, plant ...

امیری, سید رضا, حسن زاده اول, فاطمه, زرقانی, هادی , منصوری, حامد, نصیری محلاتی, مهدی, کریمیان, مجید, کوچکی, علیرضا ,

Preservation and increase of biodiversity is one of the main components to achieve sustainability in agricultural systems. In this study, biodiversity evaluation indexes were used to evaluate and compare agrobiodiversity of vegetable crop systems among all provinces of Iran. In this study the biodiversity evaluation indexes included Shannon-Wiener, Simpson and Evenness. In order to compare the ...

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...

G Gourène K.F Konan K.M Kouamé K.Y Bony O.E Edia

Fish assemblage was investigated during the study of longitudinal profile of the Ehania River Basin in south-eastern Côte d’Ivoire. This area is subjected to intense human activities with many plantations (palm tree, banana, pineapple, coffee, rubber and cocoa). Samples were collected, with gillnets of different mesh sizes, through 6 sampling surveys during dry and rainy seasons from February 2...

Snow-fed river Pinder -a tributary of river Alaknanda in central Himalaya was explored for fish assemblages and habitat specificity. Altogether 27 fish species were reported from three orders, four families and nine genera. Cypriniformes order was dominating followed by Siluriformes and Salmoniformes. Shannon-Weiner diversity index (3.09 to 4.10) and Simpson index of diversity (0.81 to 0.92) of...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید