نتایج جستجو برای: dominant species

تعداد نتایج: 666291  

Journal: :iranian j. of fisheries science 2014
h ghassemi a.p azizov s.s suleymanov

the analysis of net catches made in absheron gulfs of the caspian sea during 2011-2012 is provided. the ichthyofauna of absheron gulfs, including 26 species found in the north gulf, and 33 species and subspecies found in the south gulf was studied for the first time. a taxonomical and ecological diversity of the fish fauna of north and south absheron gulfs is characterized. the peculiarities of...

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Journal: :iranian journal of fisheries science 0
a. makhlough h. hassan nasrollahzadeh saravi f. eslami s.a.g. leroy

due to the recent destructive pressures on the caspian environment, an effect on phytoplankton communities is expected in different aspects such as cell size and form. this paper aims to survey the size and form in the dominant phytoplankton species in the years of 1996, 2001, 2006, 2009, 2011 and 2012 in the iranian coast of the caspian sea. results of current study showed that the dominant sp...

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ژورنال: حفاظت زیست بوم گیاهان 2019
, ,

The aim of this study was to investigate the flora, life form, chrotype, diversity and evenness of accompanying species of Artemisia melanolepis Boiss. and Artemisia aucheri Boiss. in the south east of Sabalan. Species were collected and identified. Overall, 82 identified plant species was belonging to 23 families and 61 genera. Asteraceae, Fabaceae, Lamiaceae and Poaceae families were the domi...

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Journal: Environmental Resources Research 2017
Mohamad Ali Alizadeh, Reza Bagheri,

This research has been conducted to establish a wheel-point device and evaluate its efficiency (precision, accuracy and time) with respect to the estimation of canopy percent in a pilot Artemisia stand in Khabr region of Baft, Kerman province, Iran in 2015. Several transects with different lengths (30, 60, 90, 120, 150 and 180 m) were established using the randomized sampling block with 5 repli...

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پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده منابع طبیعی و علوم دریایی 1388
حجت اله امیدی, مسلم اکبری نیا, سید محسن حسینی,

this research was conducted in two protect and destroy region in the middle zagros, in illam province. in order to identification of ecological species group and evaluate density of regeneration, effect of many factors such as protection, vegetation, physiographic factors, physical and chemical properties of soil in study locations were studied. to achieve these purpose number of 54 plots using...

15 صفحه اول
ژورنال: علوم آب و خاک 2008
شیشه بر, پرویز , عالیچی, محمود , مصدق, محمدسعید , نژادیان, ابراهیم سلیمان ,

In a study of aphids and their parasitoids in wheat fields of Shiraz region, the species composition, distribution and seasonal dynamics of the dominant species were monitored during 2004-5.Collections were made from 1-3 hectare fields in 10 locations within 50 Km radius around Shiraz city. Species density was estimated by counting individuals present on 40 winter wheat tillers taken at random ...

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ژورنال: تولید محصولات زراعی و باغی 2008
شیشه بر, پرویز , عالیچی, محمود , مصدق, محمدسعید , نژادیان, ابراهیم سلیمان ,

In a study of aphids and their parasitoids in wheat fields of Shiraz region, the species composition, distribution and seasonal dynamics of the dominant species were monitored during 2004-5.Collections were made from 1-3 hectare fields in 10 locations within 50 Km radius around Shiraz city. Species density was estimated by counting individuals present on 40 winter wheat tillers taken at random ...

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ژورنال: حفاظت زیست بوم گیاهان 2019
bidarnamani, fatemeh, shabanipour, mehdi,

This research aimed to investigate plant species diversity and spatial distribution of five dominant species i.e. Phragmites australis, Tamarix meyeri, Aeluropus littoralis, Aeluropus lagopoides and Cynodon dactylon in Hamoon international wetlands in 2015. To this end, a randomize-systematic sampling method was used according to w pattern by four strip transect at 5000 m2 at each station. The ...

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Journal: :Fungal Ecology 2016

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Journal: Journal of the Persian Gulf Marine Sciences 2014
Ebrahim Rajab Zadeh Ghatrami, Mahmoud Ghayyem Ashrafi, Seyyed Gholam Reza Moosapanah, Seyyed Mohammad Bagher Nabavi, Seyyedeh Narges Nabavi,

During ROPME Winter Cruise 2006, twenty six surface sediment samples taken from the Northwestern part of the Persian Gulf at depths of 13-77m were analyzed for their foraminifera content. A total of 93 species of benthic foraminifera were found in the study area. The foraminifera assemblages were dominated by Ammonia beccarii, Spiroloculina excavata, S. depressa, Quinqueloculina dimidiata,...

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