نتایج جستجو برای: marine environment of the caspian sea

تعداد نتایج: 22829776  

A. Mottaghi

Following the collapse of the Soviet Union and the discovery of gas and oil in Central Asia and Caucasia, it faced complex interests in the international political economy. These problems were mainly rooted in developing plans of the countries for increasing their influence in the area and also in Russia's connections with the Iranian and Turkish governments in the region. This paper investigat...

Journal: :caspian journal of enviromental sciences 0

following the collapse of the soviet :union: and the discovery of gas and oil in central asia and caucasia, it faced complex interests in the international political economy. these problems were mainly rooted in developing plans of the countries for increasing their influence in the area and also in russia's connections with the iranian and turkish governments in the region. this paper inv...

H. Nemati , M.H. Gerami, N. Mehdipour,

This study aimed to assess ecological quality status of hard substratum macroinvertebrates communities of the Caspian Sea with three ecological indices and their relationship 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 an...

Aboulghasem Roohi, Hamed Norouzi, Javad Hamedi, Mojtaba Mohseni,

Actinomycetes are interesting as a main producer of secondary metabolites and industrial antibiotics from marine environments. A total of 44 strains of actinomycetes were isolated from Caspian Sea sediments at a depth of 5-10 m. Preliminary screening was done using cross-streak method against 2 gram-positive and 4 gram-negative pathogen bacteria. The most potent strains MN2, MN3, MN38, MN39, MN...

2015
Nagissa Mahmoudi Michael S. Robeson Hector F. Castro Julian L. Fortney Stephen M. Techtmann Dominique C. Joyner Charles J. Paradis Susan M. Pfiffner Terry C. Hazen

The Caspian Sea is heavily polluted due to industrial and agricultural effluents as well as extraction of oil and gas reserves. Microbial communities can influence the fate of contaminants and nutrients. However, insight into the microbial ecology of the Caspian Sea significantly lags behind other marine systems. Here we describe microbial biomass, diversity and composition in sediments collect...

Journal: :محیط شناسی 0
عزیر عابسی دانشجوی دکتری آب و محیط زیست، دانشکدة مهندسی عمران، دانشگاه علم و صنعت ایران محسن سعیدی دانشیار گروه آب و محیط زیست دانشکدة عمران دانشگاه علم و صنعت ایران

the caspian sea as the biggest surrounded water body (lake) in the world is bordered by the states of azerbaijan, russia, iran, kazakhstan and turkmenistan. urban development in addition to the increase of industrial and oil production activities (oil refinery and petrochemical plants) in the northern and eastern regions of caspian sea in recent years have caused entrance of high amount of oily...

Journal: :محیط زیست طبیعی 0
شهریار سعیدی مهرورز دانشیارگروه زیست شناسی، دانشکدۀ علوم، دانشگاه گیلان، رشت علیرضا نقی نژاد دانشیارگروه زیست شناسی، دانشکدۀ علوم پایه، دانشگاه مازندران، بابلسر زینب کاظمی گرجی دانشجوی کارشناسی ارشدگروه زیست شناسی، دانشکدۀ علوم، دانشگاه گیلان، رشت

miankaleh biosphere reserve it has a set of marine and land ecosystems an area about 67349 ha and is located in the north of iran and southeast farthermost of caspian sea. the diversity of the natural characteristics of caspian region is the cause of diversity in the habitats, and has resulted in nesting of most plant species in the germinative range. regarding the importance of coastal ecosyst...

2008
Igor Zonn

The Caspian Sea is the world’s largest inland sea. Physiographically it is unique. It is the most productive body of water in the world1 and the only one that preserves the geno-fund of the sturgeon, the source of almost all the black caviar produced. About 10 million people live around the Caspian Sea and the occupations of many of them are connected with the sea, and first of all with fishing...

Introduction: Analyzing the health risk associated with the microbial contamination of seawater is necessary to ensure that there is not any threat to human or environment. The aim of this study was to evaluate the microbiological quality of Caspian sea water using indicator bacteria. Some Physicochemical parameters were studied to assed their association with the contamination level of Caspian...

Journal: :آمایش سرزمین 0
حمید دلیر کارشناسی ارشد ژئومورفولوژی دانشگاه تهران مهدی رمضان زاده لسبویی کارشناس ارشد جغرافیا و برنامه ریزی روستایی دانشگاه تهران

the geomorphology is an important branch of natural geography that its goal is promotion of human life, ultimately. the geomorphic processes have considerable impact on human life, and opposing, human activities and behaviors have its impacts on the geomorphologic units and geomorphologic processes, enhancing the above argument. the gilan county, at its geographic position; embraced by two stru...

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