نتایج جستجو برای: desert management

تعداد نتایج: 866614  

پایان نامه :دانشگاه تربیت معلم - تهران - دانشکده ادبیات و علوم انسانی 1391

abstract global financial crisis has created too many problems in relations among governments. among these problems, the issue of global monetary management, more than every time in the past four decades, has been moved in the center of international economic attentions. a problem which is specially known with the monetary hostility between united states and public republic of china. where ar...

Journal: :Molecular ecology 2008
Robert C Fleischer William I Boarman Elena G Gonzalez Alvaro Godinez Kevin E Omland Sarah Young Lauren Helgen Gracia Syed Carl E McIntosh

Common raven (Corvus corax) populations in Mojave Desert regions of southern California and Nevada have increased dramatically over the past five decades. This growth has been attributed to increased human development in the region, as ravens have a commensal relationship with humans and feed extensively at landfills and on road-killed wildlife. Ravens, as a partially subsidized predator, also ...

ژورنال: علوم آب و خاک 2017

The Ab-Barik watershed in Bam is a part of Lut desert basin. It is like all other desert areas which has erosion problems caused by wind erosion, sand and soil storms. The result of these sand storms appears as continuous and isolated sand hills. In this paper it was attempted to identify direction and source of harvest points by using sedimentological methods. This was accomplished by step by ...

2016
Xuelei Zhang Lijing Zhao Daniel Q. Tong Guangjian Wu Bo Teng

Dust storms and sandy dust events originating in arid and semi-arid areas can transport particulate material, pollutants, and potential transport long distances from their sources. Exposure to desert dust particles is generally acknowledged to endanger human health. However, most studies have examined anthropogenic particulate sources, with few studies considering contributions from natural des...

ژورنال: علوم آب و خاک 2014
اختصاصی, محمدرضا, عظیم‌زاده, حمیدرضا, فتوحی, فرزانه,

Soil surface roughness (SSR) is one of the important factors in wind and water erosion studies and control. Several parameters such as surface rock fragments influence SSR. Main objectives of this paper are to study and compare (Allmarass) random roughness (RR) and tortuosity (Tb) indices in coarse, medium and fine grain plains of Yazd-Ardakan and investigate the relationship between indices an...

Journal: :The British journal of ophthalmology 1987
N D Hawass

Sixteen cases of desert lung with cataracts were previously reported on, and an additional 14 cases have now been encountered from the same area of which 13 had cataracts. The association of cataract with desert lung was not commented on in the previous report, because it was thought to be coincidental. It now appears to be real rather than coincidental. Analysis of these 33 patients showed the...

2008
Boris R. Krasnov David Mouillot Irina S. Khokhlova Georgy I. Shenbrot Robert Poulin B. Krasnov

B. Krasnov ([email protected]) and G. I. Shenbrot, Mitrani Dept of Desert Ecology, Jacob Balustein Inst. for Desert Research, Ben-Gurion Univ. of the Negev, Sede-Boqer Campus, IL-84990 Midreshet Ben-Gurion, Israel and Ramon Science Center, P. O. Box 194, IL-80600 Mizpe Ramon, Israel. D. Mouillot, UMR CNRS-UMII 5119 Ecosystemes Lagunaires, Univ. Montpellier II, CC093, FR-34095 Montpellier Cedex ...

Journal: :Polarforschung 1988
G Bonani E I Friedmann R Ocampo-Friedmann C P McKay W Woelfli

The existence of microbial communities living inside desert rocks has been reported by FRIEDMANN et al. (1967, 1976), first in rocks collected from the hot and dry Negev desert and later in rocks in the frigid Ross Desert of Southern Victoria Land, Antarctica. The extremely inhospitable climatic conditions in both places has led to the suggestion that these organisms have very low rates of met...

Journal: :The Journal of the Acoustical Society of America 2006
Edwin R Lewis Peter M Narins Jennifer U M Jarvis Gary Bronner Matthew J Mason

Insect prey of the Namib golden mole congregate beneath clumps of grass scattered among the sand dunes of the Namib Desert. In the presence of the light winds that typically blow over the Namib Desert, these grass clumps emit low-amplitude vibrations that are transmitted through the sand. While foraging in the sand-swimming mode (a few centimeters below the surface of the sand), some moles appa...

2010
Boris R. Krasnov David Mouillot Georgy I. Shenbrot Irina S. Khokhlova Robert Poulin Jacob Blaustein

Mitrani Department of Desert Ecology, Institute for Dryland Environmental Research, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, 84990 Midreshet Ben-Gurion, Israel, UMR CNRS-UM2-IFREMER-IRD 5119 Ecosystemes Lagunaires, University of Montpellier 2, CC093, FR-34095 Montpellier Cedex 5, France, Wyler Department of Dryland Agriculture, French Associates Instit...

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