نتایج جستجو برای: dryland

تعداد نتایج: 2338  

2015
Gilad Bino Richard T. Kingsford John Porter Travis Longcore

Dryland rivers have considerable flow variability, producing complex ecosystems, processes, and communities of organisms that vary over space and time. They are also among the more vulnerable of the world's ecosystems. A key strategy for conservation of dryland rivers is identifying and maintaining key sites for biodiversity conservation, particularly protecting the quantity and quality of flow...

Journal: :Journal of environmental management 2012
Ignacio Schiappacasse Laura Nahuelhual Felipe Vásquez Cristian Echeverría

Investment in natural capital restoration is increasing as a response to the widespread ecological degradation of dryland forests. However, finding efficient mechanisms to promote restoration among private landowners is a significant challenge for policy makers with limited financial resources. Furthermore, few attempts have been made to evaluate the costs and benefits of restoration interventi...

2015
Yan Yan Wenhui Kuang Chi Zhang Chunbo Chen

The rapid expansion of impervious surface areas (ISA) threatens soil organic carbon (SOC) pools in urbanized areas globally. The paucity of field observations on SOC under ISA (SOCISA), especially in dryland areas has limited our ability to assess the ecological impacts of ISA expansion. Based on systematically measured SOCISA (0-80 cm depth) of a dryland city, and land-use and land-cover chang...

2010
Verónica Acosta-Martínez Scot E. Dowd Colin W. Bell Robert Lascano Jill D. Booker Ted M. Zobeck Dan R. Upchurch Marsha Sharp

This study evaluated microbial communities of soil (0–10 cm) as affected by dryland cropping systems under different tillage practices after 5 years. The soil type was an Olton sandy loam with an average of 16.4% clay, 67.6% sand and 0.65 g kg of organic matter (OM). The cropping systems evaluated were grain sorghum (Sorghum bicolor L.)— cotton (Gossypium hirsutum) (Srg-Ct), cotton-winter rye (...

2017
Stephen Whitfield Helmut J. Geist Antonio A. R. Ioris

Desertification is a complex process, characterised not only by a damaged ecology, but also by conflict over access to scarce resources and trade-offs between the needs of multiple stakeholders at multiple scales. As such, orthodox approaches to environmental assessment in drylands, which rely solely on ecological expertise, are gradually losing legitimacy and greater attention is being given t...

2010
Evan D. G. Fraser Andrew J. Dougill Klaus Hubacek Claire H. Quinn Jan Sendzimir Mette Termansen

Over 40% of the earth’s land surface are drylands that are home to approximately 2.5 billion people. Livelihood sustainability in drylands is threatened by a complex and interrelated range of social, economic, political, and environmental changes that present significant challenges to researchers, policy makers, and, above all, rural land users. Dynamic ecological and environmental change model...

Journal: :journal of agricultural science and technology 2011
h. miranzadeh y. emam h. seyyed s. zare

the impact of climate change in the next few decades will increase risks of wheat production under dryland conditions. therefore, it is important to find cultivars that are tolerant to these conditions and can provide reasonable yield under future climates. radiation use efficiency (rue) is the key factor determining the crop yield and is related to crop biomass and leaf area index (lai). t...

Journal: :Earth Surface Processes and Landforms 2016

Journal: :Frontiers in Ecology and the Environment 2015

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