نتایج جستجو برای: rangeland ecosystem

تعداد نتایج: 85678  

Journal: :Rangeland Journal 2023

Increasing shrub density hinders cattle raising in central Argentina rangelands. While roller-chopping and hand-cutting are used to remove shrubs make land accessible for grazing, studies on the effects of these practices ecosystem composition, structure functioning scarce. We assessed impact removal (a) vegetation cover, species richness diversity (b) green biomass seasonal phenological dynami...

2006
DAVID H. BRANSON

G ecosystems cover 30% to 40% of the earth’s terrestrial surface, provide critical habitat for large numbers of species, and support extensive grazing economies on every continent except Antarctica (Coupland 1979, Samson and Knopf 1996). In the United States alone, there are approximately 312 million hectares of rangeland (NRC 1994). Fire, grazing, and climate combine to act as the primary ecos...

2016
Mahmud A. Muminov Jie Meng Caihong Li Liyue Guo Cheng Da Gaoming Jiang

This paper describes the capability of remote sensing in the monitoring of rangeland vegetation productivities and dynamics in the foothill areas of Uzbekistan, in order to enhance the sustainable utilization of natural resources. Seasonal productivity, including above-ground biomass, density, coverage, foliar chlorophyll, and carotene content, was measured for the Artemisia diffusa, the domina...

ژورنال: مرتع 2022

 Background and objectives: Extra livestock than grazing capacity is one of the main effective factors on rangeland degradation. Most of the country's pastures have Extra livestock than grazing capacity, and from the past until now, the policy of dealing extra livestock by using legal punishments has not been able to completely solve this problem. Lack of attention to grazing capacity has led t...

Journal: :مدیریت خاک و تولید پایدار 0
فاطمه کاردل دانشگاه مازندران علیرضا تجری دانش آموخته کارشناسی ارشد گرایش آبخیزداری

increased soil dryness of hillsides and lands around the gully causes the aggravation of the gully erosion which leads to the desertion of the environment. soil moisture contents are various in different soil depths, gully positions, and in various land uses. these are fundamental for ecosystem sustainability in arid and semi-arid area. therefore, understanding the behavior of soil moisture in ...

Journal: :Conservation biology : the journal of the Society for Conservation Biology 2008
Matthew A Bowker Mark E Miller Jayne Belnap Thomas D Sisk Nancy C Johnson

Conservation prioritization usually focuses on conservation of rare species or biodiversity, rather than ecological processes. This is partially due to a lack of informative indicators of ecosystem function. Biological soil crusts (BSCs) trap and retain soil and water resources in arid ecosystems and function as major carbon and nitrogen fixers; thus, they may be informative indicators of ecosy...

2005
N. D. MacLeod J. G. McIvor

Contemporary Australian rangeland management is characterised by concurrent processes of a continuing intensification of land management practices and simplification of landscape ecological processes. This dual characteristic is associated with increasing levels of potential conflict between land management practices that promote improved economic performance of rangeland enterprises at the app...

2002
MARÍA E. FERNÁNDEZ-GIMÉNEZ

Support for range management interventions by the World Bank and other international development institutions has a somewhat checkered history. In certain respects, this has mirrored theoretical developments and shifts in thinking among rangeland professionals, but the relationship between rangeland science and development policy and practice is far from direct. It is mediated by contextual fac...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید