نتایج جستجو برای: semi arid

تعداد نتایج: 151324  

ژورنال: علوم آب و خاک 2013
انصاری, حسین, داوری, کامران, شفیعی, مجتبی, قهرمان, بیژن,

Application of conceptual hydrological models is an important issue in watersheds for researchers, especially in arid and semi-arid regions. The hydrological behaviors are complicated in such watersheds and their calibration is more difficult. In this article, the conceptual and semi-distributed SWAT model is used for a semi-arid Nishabour watershed with 9350 km2 area. Streamflow simulation is ...

Journal: :بوم شناسی کشاورزی 0
سعید شفیعی احمد گلچین مجمد امیر دلاور

introduction various factors like climatic conditions, vegetation, soil properties, topography, time, plant residue quality and crop management strategies affect the decomposition rate of organic carbon (oc) and its residence time in soil. plant residue management concerns nutrients recycling, carbon recycling in ecosystems and the increasing co2 concentration in the atmosphere. plant residue d...

Journal: :Plant science : an international journal of experimental plant biology 2016
M M Chaves J M Costa O Zarrouk C Pinheiro C M Lopes J S Pereira

Stomatal regulation of leaf gas exchange with the atmosphere is a key process in plant adaptation to the environment, particularly in semi-arid regions with high atmospheric evaporative demand. Development of stomata, integrating internal signaling and environmental cues sets the limit for maximum diffusive capacity of stomata, through size and density and is under a complex genetic control, th...

2003
F. J. OLIVA-PATERNA A. VILA-GISPERT M. TORRALVA

This study investigated the relationships between fish condition and environmental variables in Barbus sclateri from semi-arid freshwater ecosystems in the south-eastern Iberian Peninsula. Two main habitats were studied: semi-arid streams characterized by strong seasonal fluctuations in flow level (droughts and floods) and reservoirs (artificial ecosystems characterised by waters of high conduc...

2004
PETER J. TAYLOR

Taylor, P.J., Kumirai, A., Contrafatto, G.-C. 2004. Geometric morphometric analysis of adaptive cranial evolution in southern African laminate-toothed rats (Family: Muridae, Tribe: Otomyini). Durban Museum Novitates 29: 110-122. Geometric morphometric analysis of cranial shape and size variation was carried out on laminate-toothed rats (Rodentia: Muridae: Otomyini) from southern Africa, to inve...

2012
M. P. McClaran

Regression equations were developed to estimate above ground biomass and carbon and nitrogen mass of foliage and stem size fractions from plant size dimensions (basal diameter, canopy area, height, canopy volume) for a tall shrub species (Prosopis velutina) that has increased in abundance in arid and semi-arid grasslands in the southwestern United States and northwestern Mexico. Regression equa...

Journal: :Remote Sensing 2014
Wenping Yu Mingguo Ma Xufeng Wang Liying Geng Junlei Tan Jinan Shi

This study presents preliminary results of the validation of the Moderate Resolution Imaging Spectroradiometer (MODIS) daily LST products (MOD/MYD11A1, Version 5) using longwave radiation ground measurements obtained at 12 stations in the North Arid and Semi-Arid Area Cooperative Experimental Observation Integrated Research program. In this evaluation process, the broadband emissivity at each s...

2014
Hongjia Li Sivakumar Pattathil Marcus B Foston Shi-You Ding Rajeev Kumar Xiadi Gao Ashutosh Mittal John M Yarbrough Michael E Himmel Arthur J Ragauskas Michael G Hahn Charles E Wyman

BACKGROUND Agave, which is well known for tequila and other liquor production in Mexico, has recently gained attention because of its attractive potential to launch sustainable bioenergy feedstock solutions for semi-arid and arid lands. It was previously found that agave cell walls contain low lignin and relatively diverse non-cellulosic polysaccharides, suggesting unique recalcitrant features ...

2017
Guoqing Chen Mingjiu Wang Zhengjia Liu Wenfeng Chi

The biogeophysical effects of land cover change (LCC) on land surface temperature are largely understood, especially in tropical and boreal zones, but fewer studies have reported the biogeophysical consequences of ecological restoration of mining areas located in arid and semi-arid temperate zones. In this study, we employed 2000–2015 satellite-based net radiation (Rn) and latent heat flux (LE)...

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