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...

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...

this study was aimed to assess wheat-grown fields health in gharessoo basin, golestan province, iran, using 79 fields in 8 villages in 2010. the samples were taken by quadrates. the number and the type of weeds were recorded at genera and species levels. in parallel, management data were recorded by questionnaire. species richness was defined as species number and shannon-wiener index, simpson’...

This study provides a baseline measure of pelagic fish species diversity around fish aggregating devices (FADs) in the Western Indian Ocean. Using data from visual censuses made by SCUBA divers around drifting FADs we (1) analysed 11 diversity indices describing 4 main components of pelagic diversity: number of species, evenness, taxonomic diversity and rarity and (2) discussed the viability of...

The conversion of land functions can result in a decrease environmental quality, which reduce the diversity butterflies. This study aimed to determine level and find most abundant less butterfly species around campus 4 UAD. sampling was done at area, vacant land, rice fields housing sites. Each these sites had 2 plots consisted 5 subplots, respectively. Sampling carried out four times, morning ...

AIM To compare gut bacterial diversity and amount of Enterobacteriaceae in colonic mucosa between patients with and without diverticular disease (DD). METHODS Patients in a stable clinical condition with planned elective colonoscopy were included. Blood samples and colon mucosa biopsies were collected at the colonoscopy. Study questionnaires including questions about gastrointestinal symptoms...

in this study, macrobenthic bivalves were identified at 12 stations located in four regions (markazi, shahr no, khalasi, and gabrik creeks). the relationships between density of bivalves and non-biological factors were examined, as well. sampling of sediments was done seasonally from autumn 2009 to summer 2010, by 0.04 m2 van veen grab, in three stations including mouth, middle and end of each ...

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...

Abstract Birds are an important part of wetland ecosystem. With the development urbanization, bird vegetation is destroyed seriously, threatening diversity. In view this, this paper studied dynamic changes NDVI (Normalized Difference Vegetation Index) and three diversity indexes (Shannon-Wiener index, Simpson Pielou index), explored relationship between two, based on survey data Landsat 8 remot...