نتایج جستجو برای: grazing unauthorized livestock

تعداد نتایج: 39687  

Journal: :Journal of animal science 2004
D W Bailey

Application of existing and novel management techniques can alter traditional livestock grazing patterns and significantly improve the sustainability of arid rangelands. Livestock often congregate and heavily graze riparian areas and other sensitive rangeland, while abundant forage remains in other areas. Increasing the uniformity of grazing can help protect fisheries, wildlife habitat, and oth...

Journal: :Global change biology 2017
Tamara Fetzel Petr Havlik Mario Herrero Karl-Heinz Erb

Increasing food production is essential to meet the future food demand of a growing world population. In light of pressing sustainability challenges such as climate change and the importance of the global livestock system for food security as well as GHG emissions, finding ways to increasing food production sustainably and without increasing competition for food crops is essential. Yet, many un...

2017
Vroni Retzer V. Retzer

Burrowing small mammals in grasslands have long been regarded as pests because they compete for forage with livestock and reduce the forage availability for livestock by destroying pastures through their intensive digging activity. In order to investigate forage competition between the Mongolian Pika (Ochotona pallasi) and livestock an exclosure experiment consisting of four different treatment...

2006
Temuulen Tsagaan Sankey Cliff Montagne Lisa Graumlich Rick Lawrence Jerry Nielsen

We studied five lower forest–grassland ecotones in the Darhad Valley in northern Mongolia and investigated the effects of 20th Century grazing regimes and changes in grazing management on ecotone dynamics at a local scale. A total of 2968 Siberian larch (Larix sibirica) trees were cored and tree-age distribution was constructed to determine 20th Century tree establishment. Tree age and location...

2011
Flavie VIAL David W. MACDONALD Daniel T. HAYDON

The Bale Mountains of Ethiopia represent the world’s largest continuous extent of afroalpine habitat. With a peak combined density of over 8000 individuals/km, the endemic giant mole rat Tachyoryctes macrocephalus, Blick's grass rat Arvicanthis blicki and the brush-furred mouse Lophuromys melanonyx are the dominant wild herbivores within this ecosystem and may be affected by the presence of hig...

2005
NATHAN F. SAYRE

The contemporary southwestern United States is characterized by fire-adapted ecosystems; large numbers of federally listed threatened and endangered species; a patchwork of federal, state, and private landownership; and a long history of livestock grazing as the predominant land use. I compared eight sites in southern Arizona and New Mexico to assess the interacting effects of these characteris...

Journal: :محیط شناسی 0
سید امین نجات کارشناس ارشد حقوق محیط زیست، دانشگاه آزاد اسلامی، واحد علوم تحقیقات تهران فرهاد دبیری استادیار و مدیرگروه حقوق محیط زیست، دانشگاه آزاد اسلامی، واحد علوم تحقیقات تهران

in areas protected by the current rules are that it can be a special legal regime of the named areas, but these rules apply and a special legal regime to prevent law enforcement will be more general, but it also confirms the fact that the general rules in the areas of special rules that only apply in these areas is about legal regime make up. state eligibility rules related to the epa, hunting ...

جعفری, فرهنگ , زارع‌کیا, صدیقه, غلامی, پرویز , فیاض, محمد, گودرزی, محمود ,

Livestock grazing is a common human-induced activity with direct and indirect effects even on the ecosystems of protected areas. The present study analyzed the effects of different grazing management methods on species diversity and richness in the steppe rangelands of Saveh, Iran. Data were collected from sixty 2×2 m plots within the areas of three, four-years protected range management projec...

Journal: :Environmental management 2002
Daniel A Sarr

Over the last three decades, livestock exclosure research has emerged as a preferred method to evaluate the ecology of riparian ecosystems and their susceptibility to livestock impacts. This research has addressed the effects of livestock exclusion on many characteristics of riparian ecosystems, including vegetation, aquatic and terrestrial animals, and geomorphology. This paper reviews, critiq...

2007
Y. H. Gao P. Luo N. Wu H. Chen

Livestock grazing has the potential to substantially alter carbon (C) storage in grassland ecosystem. In this study, we evaluated the soil-plant system C (0-30cm) under three different grazing intensities by yaks (light: 1.2, moderate: 2.0, and heavy: 2.9 yaks/ha) in alpine meadow on the eastern Tibetan Plateau. Soil organic C at 0-30cm depth and total plant components C increased from light gr...

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