نتایج جستجو برای: shannon wiener

تعداد نتایج: 17177  

Journal: :Journal of environmental radioactivity 2011
J F Murphy L L Nagorskaya J T Smith

Littoral (lake shore) macroinvertebrate communities were studied in eight natural lakes affected by fallout from the Chernobyl accident. The lakes spanned a range in (137)Cs contamination from 100 to 15500 kBq m(-2) and estimated external dose rates ranged from 0.13 to 30.7 μGy h(-1). General linear models were used to assess whether abundance of individuals, taxon richness, Berger-Parker domin...

2014
Wei Lu Jialin Yu Qing Ai Dong Liu Chao Song Luquan Li

Ventilator-associated pneumonia (VAP) is a common complication and cause of death in neonates on mechanical ventilation. However, it is difficult to define the causes of VAP. To understand the causes of VAP, we undertook a prospective study based on the diversity of the microflora in VAP. The experimental group consisted of newborns who suffered from respiratory distress syndrome (RDS) and VAP,...

2014
Leilei Tang Chuanpeng Cheng Kaiyuan Wan Ruhai Li Daozhong Wang Yong Tao Junfeng Pan Juan Xie Fang Chen

Weeding and fertilization are important farming practices. Integrated weed management should protect or improve the biodiversity of farmland weed communities for a better ecological environment with not only increased crop yield, but also reduced use of herbicides. This study hypothesized that appropriate fertilization would benefit both crop growth and the biodiversity of farmland weed communi...

Journal: :E3S web of conferences 2021

An investigation of phytoplankton community and water quality for M River was conducted in December 2019.The results showed that 38 species belonging to 6 phyla 26 genera were collected. Among them, Bacillariophyta is the richest species, which accounted 34.21%, followed by Cyanophyta with 26.32% Chlorophyta 28.95%. The density 63.0*106 inds/L indicated as eutrophic body. highest Bacillariophyt...

Abbaspour, F., Gharaei, A., Iezadi, G.H., Mirdar Harijani , J.,

A biological assessment of the Tang Sorkh River (Iran) was studied from July 2013 to August 2014 using benthic macroinvertebrate communities. Samples were gathered every two months, from five stations using a Surber sampler( 30×30cm), fixed in formalin (4%) and then separated and identified in the laboratory. Environmental conditions (current velocity, temperature, depth, width, dissolve oxygen...

Journal: :international journal of advanced biological and biomedical research 0
maziar haidari young researchers club, sanandaj branch, islamic azad university, sanandaj, iran

silvicultural operation need to notice the plant species diversity in forest. to this study gomarlang district in marivan region, northern zagros forest was selected. selected 100 ha area because have similar physiography condition (north aspect and 1650 to 1800 m s.a.l. in study area 100 micro plots of 5m by 5 m (25 m2) including the species and the numbers of this species randomized-systemati...

Journal: :Jurnal Penelitian Pendidikan IPA (JPPIPA) 2022

The microalgae community structure in an aquatic ecosystem is strongly influenced by environmental factors. One of the rivers Indonesia, located inhe island Lombok, West Nusa Tenggara, Jangkok River. River widely used residents for activities, including industry, cultivation, waste disposal, and others. This study aimed to determine research was carried out with exploration descriptive method q...

Journal: :Nigerian Journal of Technology 2022

The protracted imbalance and shortage in electricity supply Nigeria has being adjudged to be multidimensional: ranging from generation billing, due inability diversify our power technologies away hydro gas. Thus, this paper attempts assess the extent of diversification within industry. Shannon Wiener diversity index was adapted measures energy among current potential available Nigeria. result r...

Journal: :پژوهش های علوم و فناوری چوب و جنگل 0

the aim of this study is comparison of soil characteristics and biodiversity in plantation of bald cypress and caucasian alder forest stands in kludeh region (mazandaran province). in order to study biodiversity in forest stands and control region, 10 sample plots (releve) were selected and the name and abundance of plant species of the forest floor were recorded. biodiversity of herbal plants ...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید