نتایج جستجو برای: livestock ecosystem

تعداد نتایج: 104389  

2014
Bernard Bett

One of our remarkable research outputs to date, produced as part of a graduate fellowship programme, is an ecological niche map for RVF in Kenya. The student involved, Dr Purity Kiunga, initiated the study by georeferencing known RVF hotspots in Kenya and analysing them together with spatial datasets on precipitation, rainfall, soil types, land use and vegetation indices. The work has generated...

2007
William B. Karesh Robert A. Cook Martin Gilbert James Newcomb

The global trade in wildlife provides disease transmission mechanisms that not only result in human disease outbreaks, but also threaten livestock, international trade, rural livelihoods, native wildlife populations, and the health of ecosystems. Global movement of animals for the pet trade is estimated at some 350 million live animals, worth approximately US$20 billion per year. Approximately ...

2007
T. G. Bidwell Bob Woods

Oklahoma is blessed with an abundance of excellent forage resources. Many Oklahoma producers enjoy the benefits of operating livestock production systems on both rangeland and introduced-forage pastures. However, some producers may not be aware of the need for different management strategies for the two ecosystems. Improper management generally results in decreased profitability of the livestoc...

2006
Henry Neufeldt Michael Schäfer Elisabeth Angenendt Changsheng Li Martin Kaltschmitt Jürgen Zeddies

Estimates of regional greenhouse gas emissions from agricultural systems are needed to evaluate possible mitigation strategies with respect to environmental effectiveness and economic feasibility. Therefore, in this study, we used the GIS-coupled economic-ecosystem model EFEM–DNDC to assess disaggregated regional greenhouse gas (GHG) emissions from typical livestock and crop production systems ...

2002
Kathleen A. Dwire J. Boone Kauffman

Despite the numerous values of riparian areas and the recognition of fire as a critical natural disturbance, few studies have investigated the behavior, properties, and influence of natural fire in riparian areas of the western USA. Riparian areas frequently differ from adjacent uplands in vegetative composition and structure, geomorphology, hydrology, microclimate, and fuel characteristics. Th...

2016
Seleshi G. Yalew Marloes L. Mul Ann van Griensven Ermias Teferi Joerg Priess Christian Schweitzer Pieter van Der Zaag

Land-use and land-cover changes are driving unprecedented changes in ecosystems and environmental processes at different scales. This study was aimed at identifying the potential land-use drivers in the Jedeb catchment of the Abbay basin by combining statistical analysis, field investigation and remote sensing. To do so, a land-use change model was calibrated and evaluated using the SITE (SImul...

2009
Manuel Ruiz Muller Francisca Bayona

Agrobiodiversity zones and the register of native crops in Peru " We are diverse … we shall always be " Said by a colleague from IIAP Dedication To my wife Rosie for her love and affection, and my sons Manolo and Alonso for their patience. Underlying an extensive recognition of the importance of agrobiodiversity and native crops in Peru, there is a relatively recent phenomenon in urban sectors ...

Journal: :تولید گیاهان زراعی 0

production of halophyte plants with saline water and soil and feeding them to livestock is one of the most sustainable methods of conservation in desert ecosystem regions. kochia is a high salt resistant plant that can widely use as forage for livestock in arid ecosystems with lack of appropriate water and soil resources. in order to investigate potential of forage production of five different ...

Journal: :محیط شناسی 0
محمدحسن جوری عضو هیأت علمی، دانشگاه آزاد اسلامی واحد نور

introduction the complexity of natural ecosystem, as the rangelands, is caused to propose the different approaches toevaluatethe ecosystem on the basis of sustainable and systematic management. study on the interaction connectionsbetween plants and biotic and abiotic factors in the rangeland ecosystem can be achieved by relationsofmanagerial strategies in order to conduct the rangeland health. ...

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