نتایج جستجو برای: arid region

تعداد نتایج: 552339  

Journal: :journal of rangeland science 2012
jalal barkhordari trahel vardanian

classifying remote sensing imageries to obtain reliable and accurate landuse/cover (luc) information still remains a challenge that depends on many factors suchas complexity of landscape especially in arid region. the aim of this paper is to extractreliable luc information from land sat imageries of the pishkouh watershed of centralarid region, iran. the classical maximum likelihood classifier ...

Journal: :Scientific reports 2016
Jin-bo Zhang Liang Wang Wei Zhao Hui-feng Hu Xiao-juan Feng Christoph Müller Zu-cong Cai

Climate changes are predicted to increase extreme rainfall events in semiarid and arid region in Northern Hemisphere. Nutrient cycles will be affected by the precipitation changes but so far only very little is known how soil N transformations may respond. Here we investigated gross soil N transformation rates and their response to simulated rainfall events across Northeast China Transect (NECT...

2012
K. H. Li

General Comments: This manuscript, “Atmospheric reactive nitrogen concentrations at ten sites with contrasting land use in an arid region of Central Asia”, is a good baseline assessment of the concentrations of nitrogenous species for an understudied region of the world, the arid Xinjiang region of China. This study will provide foundational information in understanding air quality over this re...

2013
Liming Lai Jianjian Wang Yuan Tian Xuechun Zhao Lianhe Jiang Xi Chen Yong Gao Shaoming Wang Yuanrun Zheng

Climate change is generally predicted to increase net primary production, which could lead to additional C input to soil. In arid central Asia, precipitation has increased and is predicted to increase further. To assess the combined effects of these changes on soil CO2 efflux in arid land, a two factorial manipulation experiment in the shrubland of an arid region in northwest China was conducte...

Journal: :The American Naturalist 1899

Journal: :The Journal of biological chemistry 2004
Suhkmann Kim Ziming Zhang Sean Upchurch Nancy Isern Yuan Chen

ARID (AT-rich interaction domain) is a homologous family of DNA-binding domains that occur in DNA-binding proteins from a wide variety of species, ranging from yeast to nematodes, insects, mammals, and plants. SWI1, a member of the SWI/SNF protein complex that is involved in chromatin remodeling during transcription, contains the ARID motif. The ARID domain of human SWI1 (also known as p270) do...

2014
Alcade C Segnon Enoch G Achigan-Dako

BACKGROUND Agrobiodiversity is said to contribute to the sustainability of agricultural systems and food security. However, how this is achieved especially in smallholder farming systems in arid and semi-arid areas is rarely documented. In this study, we explored two contrasting regions in Benin to investigate how agroecological and socioeconomic contexts shape the diversity and utilization of ...

Journal: :Science 2003
Rafael Navarro-González Fred A Rainey Paola Molina Danielle R Bagaley Becky J Hollen José de la Rosa Alanna M Small Richard C Quinn Frank J Grunthaner Luis Cáceres Benito Gomez-Silva Christopher P McKay

The Viking missions showed the martian soil to be lifeless and depleted in organic material and indicated the presence of one or more reactive oxidants. Here we report the presence of Mars-like soils in the extreme arid region of the Atacama Desert. Samples from this region had organic species only at trace levels and extremely low levels of culturable bacteria. Two samples from the extreme ari...

Journal: :Journal of the Japanese Society of Revegetation Technology 1995

2017
Xiaotao Huang Geping Luo Xinxin Wang

Arid grassland ecosystems are widely distributed across Central Asia. However, there is a lack of research and observations of the land–atmosphere exchange of water and heat in the arid grasslands in this region, particularly over complex surfaces. In this study, systematic observations were conducted from 2013 to 2015 using an HL20 Bowen ratio and TDR300 and WatchDog1400 systems to determine t...

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