نتایج جستجو برای: biodiversity

تعداد نتایج: 36786  

ژورنال: زیست شناسی دریا 2020
Ilkhani, Mahsa , Nejat Khah Manavi, Parisa , Rabani, Mohammad , Sadat Sadeghi, Mahnaz ,

The marine environment is a rich source of biodiversity and chemical compounds, and based on biodiversity knowledge, it is believed that the highest biodiversity is related to living organisms in tropical and semi-equatorial regions. The goal of this study was the biodiversity of Demospongiae sponge in Assaluyeh area in May 2018. Sampling carried oyu by using Coadrat in three sites with three r...

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 ...

Journal: :محیط شناسی 0
منصور زیبایی آذر شیخ زین الدین

in this study an attempt has been made to empirically examine the relationship between biodiversity and economic growth using indicators of species diversity and income per capita as proxies for biodiversity and economic growth, respectively.also the effects of agricultural value added as a percentage of gdp, trade freedom index, exchange rate, population, percantage of land developed for agric...

Journal: :محیط زیست طبیعی 0
سید مسعود منوری استادیار گروه علوم محیط زیست، دانشکده محیط زیست و انرژی، واحد علوم تحقیقات، دانشگاه آزاد اسلامی واحد تهران، ایران راضیه رحیمی مربی گروه علوم محیط زیست، دانشکده منابع طبیعی، دانشگاه آزاد اسلامی واحد اراک، ایران

this paper discusses the integration of biodiversity concerns with environmental impact assessment (eia) procedures of iran. indeed, it compares and analyses this status in six south asian countries. the analysis was based on the reports available from a number of eia report references to biodiversity, and biodiversity related issues, level and compositional, structure or functional component o...

Odey Ogah, Tsue Peter Terfa Ugorja, Comfort Livinus

The study analyzed agricultural extensification and biodiversity loss in Cross River State, Nigeria. The study used primary data with the aid of a well-structured questionnaire to collect data from one hundred and ten respondents (110) through simple random sampling technique. Data collected were analyzed using descriptive statistics as well as inferential statistics. The results revealed that ...

صیاد, احسان, طالشی, حمید , عسکرپور, محمدرضا ,

Soil macrofauna biodiversity has an important role in ecosystem services. In order to find how soil macrofauna biodiversity is related to trees and shrubs in riparian forest of Maroon River in Khuzestan province, soil macrofauna were collected using hand-sorting procedure from 0-10 and 10-25 cm soil depths in 50 cm × 50 cm plots, 50 meters from each other on transects 100 meters apart and perpe...

Journal: :بوم شناسی کشاورزی 0
آرش قلعه گلاب بهبهانی مهدی نصیری محلاتی رضا کشاورز افشار علی علی پور جهانگیری علیرضا پازکی حسام صفا محمد کریمی نژاد

biodiversity refers to all forms of living animals, plants and microorganisms and agro-biodiversity is a component of biodiversity that represents diversity in arable lands. the aim of this study was to determine the biodiversity status of agro-ecosystems of shahr-e-rey city located in south of tehran, through calculating species richness index using rarefaction method. to the collect required ...

Journal: :journal of rangeland science 2013
victor r squires neymatolla safarov

tajikistan is a hotspot of plant and animal species diversity and endemism andis important for the conservation of biodiversity on a global scale. the country is located ata biological crossroads. species from central and northern europe, central asia, themiddle east, and north africa mingle here with endemics found nowhere else. therichness of tajikistan‘s biodiversity shows up at the genetic,...

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...

Landslides caused many ecological processes at landscape to local scales, including the ecological succession processes. The landslides geological characteristics and their management as physical risks are truly documented but the ecological processes that are caused by landslides and their relations to efforts to restore stability to unstable slopes, have not been well studied. In this study, ...

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