نتایج جستجو برای: benthic macroinvertebrates

تعداد نتایج: 12923  

A. Abdoli F. Hosseinabadi F. Mehrjo S.H. Hashemi

The invertebrates are one of the most important terrestrial fauna and freshwater taxa.Benthic macroinvertebrates include aquatic insects and spiders, mites, crustaceans, andspecies of mollusks and worms that are aquatic in their immature stages and terrestrial intheir adult stage. Jajrud River originates from the Alborz Mountains and is a source of<br ...

2004
CHRISTOPHER T. ROBINSON STEFAN AEBISCHER URS UEHLINGER

Spatial and temporal patterns of transported organic matter (seston) and macroinvertebrates (drift) and benthic macroinvertebrate densities were examined before, during, and shortly after each of a series of scheduled, experimental floods in a flow-regulated river in the Swiss National Park. Temporal patterns in the lateral transfer of seston, drift, and benthic macroinvertebrates were evaluate...

Journal: :Brazilian journal of biology = Revista brasleira de biologia 2011
W A C Chiba M D Passerini J G Tundisi

Benthic macroinvertebrates have many useful properties that make possible the use of these organisms as sentinel in biomonitoring programmes in freshwater. Combined with the characteristics of the water and sediment, benthic macroinvertebrates are potential indicators of environmental quality. Thus, the spatial occurrence of potentially toxic metals (Al, Zn, Cr, Co, Cu, Fe, Mn and Ni) in the wa...

A. Bozorgi Makrani J. Imanpour Namin, M. Sharifinia

Impacts of effluent from fish farming activities on fluvial ecosystems lead to deterioration of water quality and changes in the macroinvertebrates assemblage. In this study, the influence of fish farm effluents on water quality and macroinvertebrates communities of Tajan River was investigated to evaluate the suitability of macroinvertebrates based on biological metrics and indices. Benthic...

Journal: :caspian journal of environmental sciences 2013
j. imanpour namin m. sharifinia a. bozorgi makrani

impacts of effluent from fish farming activities on fluvial ecosystems lead to deterioration of water quality and changes in the macroinvertebrates assemblage. in this study, the influence of fish farm effluents on water quality and macroinvertebrates communities of tajan river was investigated to evaluate the suitability of macroinvertebrates based on biological metrics and indices. benthic ma...

2016
Yamian Zhang Yi Zhu Aojie Zuo Li Wen Guangchun Lei

Wuliangsuhai Lake provides important breeding and stopover habitats for shorebirds. The health of this wetland ecosystem is rapidly deteriorating due to eutrophication and water pollution and environmental management is urgently needed. To explore the connections among ecosystem health, prey density, and shorebird populations, we conducted surveys of both the benthic macroinvertebrates and shor...

G Azari Takami, H Khara, J Mesgaran Karimi , R Abbaspour,

The aim of this study was to assess the influence of trout farm effluents on water quality parameters in the Dohezar Stream. In this study two trout farms and 7 stations were selected and physiochemical of water, including air and water temperatures, dissolved oxygen concentration (DO), pH, electrical conductivity (EC), water flow and biochemical oxygen demand (BOD) were measured every 30 days ...

This study aimed to assess ecological quality status of hard substratum macroinvertebrates communities of the Caspian Sea with three ecological indices and their relation with environmental factors. For this purpose benthic communities of the Caspian Sea basin were studied seasonally during 2014 in 8 sampling sites. Temperature, salinity, dissolved oxygen, pH, nitrate, nitrite, silicate and pho...

Journal: :محیط زیست طبیعی 0
زینب شیرچی ساسی دانشگاه شهید بهشتی -پژوهشکده علوم محیطی اصغر عبدلی دانشیار گروه تنوع زیستی و مدیریت اکوسیستم‏ها، پژوهشکدۀ علوم محیطی، دانشگاه شهید بهشتی حسین هاشمی استادیار گروه آلاینده‏های محیط زیست، پژوهشکدۀ علوم محیطی، دانشگاه شهید بهشتی

benthic macroinvertebrates in river are useful indicators for adverse impacts on the catchment and river ecosystems. these organisms integrate many ecological processes in catchment scale. in this study several single and multi metric biotic indices were used based on macroinvertebrates in order to evaluate the water quality of jajrood river. macroinvertebrates as well as water samples were col...

Journal: :Journal of experimental marine biology and ecology 2000
Lopes Pardal Marques

The effect of macroalgal blooms and predation by wading on benthic macroinvertebrates was examined in the Mondego estuary, Portugal, during spring 1997. Introduced macroalgal cover and exclusion of predators were used to examine changes in density of macroinvertebrates using univariate and multivariate analyses. There was no evidence of changes in numbers of macroinvertebrates due to predation....

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