نتایج جستجو برای: arid zones

تعداد نتایج: 63858  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید بهشتی - دانشکده علوم زمین 1386

چکیده ندارد.

Journal: :Civil and Environmental Engineering 2023

Abstract The development of societies and the increasing growth recent constructions, especially in cities, have caused environmental issues, destruction, reduction natural resources environment, green green-blue spaces. According to studies, past years, many parts even pristine surfaces spaces big cities been turned into artificial, impermeable spaces, which has aggravated ecological problems ...

Journal: :Frontiers of Architectural Research 2019

2011
Joelle Cook Sara Curran C. Leigh Anderson

Sorghum grows well in arid and semi-arid agroecological zones and is thus one of the most important cereals in the Sahel region of Sub-Saharan Africa (SSA).3 Sudan, Burkina Faso, Mali, Nigeria, and Niger lead sorghum production per capita in SSA. Per capita consumption is dominated by Sudan, Burkina Faso, Mali, and Chad. Ethiopia is also a major producer and consumer of sorghum.4 FAO data from ...

2010
Tobias Siegfried

There exists a general consensus that future climate change has the potential to severely impact fragile regions on the planet, especially the semi-arid to arid zones [1]. If adaptation strategies are absent and institutions are not in place for mitigation, economies will suffer and intraand interstate conflicts over the allocation of scarce resources will potentially ensue. These developments,...

2011
Jessica S King Bronwyn McAllan Derek S Spielman Scott A Lindsay Lada Hůrková-Hofmannová Ashlie Hartigan Sarwat E Al-Qassab John T Ellis Jan Šlapeta

Experimental infections of Sminthopsis crassicaudata, the fat-tailed dunnart, a carnivorous marsupial widely distributed throughout the arid and semi-arid zones of Australia, show that this species can act as an intermediate host for Neospora caninum. In contrast to existing models that develop relatively few N. caninum tissue cysts, dunnarts offer a new animal model in which active neosporosis...

Journal: :Science 2003
Michelle A Walvoord Fred M Phillips David A Stonestrom R Dave Evans Peter C Hartsough Brent D Newman Robert G Striegl

A large reservoir of bioavailable nitrogen (up to approximately 10(4) kilograms of nitrogen per hectare, as nitrate) has been previously overlooked in studies of global nitrogen distribution. The reservoir has been accumulating in subsoil zones of arid regions throughout the Holocene. Consideration of the subsoil reservoir raises estimates of vadose-zone nitrogen inventories by 14 to 71% for wa...

Journal: :Parasitology 2012
Nayara O Belo Adriana Rodríguez-Ferraro Erika M Braga Robert E Ricklefs

Arid zones of northern Venezuela are represented by isolated areas, important from an ornithological and ecological perspective due to the occurrence of restricted-range species of birds. We analysed the prevalence and molecular diversity of haemosporidian parasites of wild birds in this region by screening 527 individuals (11 families and 20 species) for parasite mitochondrial DNA. The overall...

2008
Lyubov A. Kapustina Montserrat Torrell Joan Vallès

USDA Forest Service Proceedings RMRS-P-21. 2001 In: McArthur, E. Durant; Fairbanks, Daniel J., comps. 2001. Shrubland ecosystem genetics and biodiversity: proceedings; 2000 June 13–15; Provo, UT. Proc. RMRS-P-21. Ogden, UT: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. Lyubov A. Kapustina,Botanical Garden and Botanical Institute, Academy of Sciences of the Rep...

2003
SABINE TEBBICH HANS WINKLER

In the Galápagos Islands climate and food abundance vary strongly among vegetation zones and between seasons. We studied the foraging behavior of four mainly insectivorous Darwin’s finch species on Santa Cruz Island. We compared foraging behavior between (1) the arid zone, where food is scarce, with the humid Scalesia zone, where food is abundant; and (2) within each zone between dry and wet se...

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