نتایج جستجو برای: dry rangeland

تعداد نتایج: 95008  

Arghavan Shahlayie Azadeh Afrigan Mohammad Jafari Sara Jamalpour

The purpose of this study was identifying rangeland development andrestoration operations targets. This study was conducted in Hossein Abad Bazoft basinwith 7162 ha area, located in south east of Farsan County, Chaharmahal and BakhtiariProvince, Iran. The basin has various land uses including rangeland, forest, irrigated farmand garden, dry farm, residential area and rock mass. In this study, d...

2009
Birgit Müller Martin Quaas Karin Frank Stefan Baumgärtner

Rain-index insurance is strongly advocated in many parts of the developing world to help farmers to cope with climatic risk that prevail in (semi-)arid rangelands due to low and highly uncertain rainfall. We present a modeling analysis of how the availability of rain-index insurance affects the sustainability of rangeland management. We show that a rain-index insurance with frequent payoffs, i....

Journal: :Bulletin of the Ecological Society of America 2006

2012
Jason W. Karl Jeffrey E. Herrick Dawn M. Browning

Adapting what we currently know about ecosystems to a future where rangelands are changing is a new frontier in rangeland management. Current tools for knowledge discovery and application are limited because they cannot adequately judge ecological relevance of knowledge to specific situations. We propose development of integrated knowledge systems (KSs)— collections of resources (e.g., data, an...

Journal: :Environmental management 2011
Dustin D Johnson Kirk W Davies Peter T Schreder Anna-Marie Chamberlain

Medusahead (Taeniatherum caput-medusae (L.) Nevski) is an exotic annual grass invading rangelands in the western United States. Medusahead is a serious management concern because it decreases biodiversity, reduces livestock forage production, and degrades the ecological function of rangelands. Despite the obvious importance of ranchers as partners in preventing and managing medusahead in rangel...

2016
Teshome Abate Ayana Angassa

INTRODUCTION Analyzing trends of land use systems and the changes occurred overtime is an effective way of assessing the impacts of land use/land cover (LULC) changes on ecosystem function. It provides important insights for understanding the spatial patterns of land use processes. The rangelands of southern Ethiopia are adversely affected by increased human population pressure, encroachment of...

2005

Humans have exerted large-scale changes on the terrestrial biosphere, primarily through agriculture; however, the impacts of such changes on the hydrologic cycle are poorly understood. The purpose of this study was to test the hypothesis that the conversion of natural rangeland ecosystems to agricultural ecosystems impacts the subsurface portion of the hydrologic cycle by changing groundwater r...

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