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Effects of Long-Term Livestock Grazing on Fuel Characteristics in Rangelands: An Example From the Sagebrush Steppe

Journal Articles & Books
Décembre, 2010

Livestock grazing potentially has substantial influence on fuel characteristics in rangelands around the globe. However, information quantifying the impacts of grazing on rangeland fuel characteristics is limited, and the effects of grazing on fuels are important because fuel characteristics are one of the primary factors determining risk, severity, continuity, and size of wildfires.

Effects of Weather and Land Management on the Western Prairie Fringed-orchid (Platanthera praeclara) at the Northern Limit of its Range in Manitoba, Canada

Journal Articles & Books
Décembre, 2015
Canada
États-Unis d'Amérique

The western prairie fringed-orchid is a rare North American orchid restricted to a few remnants of wet to mesic tallgrass prairie. It is federally listed in both Canada and the United States and both countries have developed a recovery plan for the species. Two key management objectives are to monitor population trends and identify beneficial management practices. We used 21 y of data from the Manitoba metapopulation to assess effects of weather and land management on this species. Our results suggest the metapopulation in Manitoba is relatively stable.

Des prairies toujours entretenues par les élevages allaitants extensifs... Quelques enseignements

Journal Articles & Books
Décembre, 2014
France

Permanently maintained pastures in France are often located in less desirable areas of the country and are extensively used for grass based farming, dairy farming an mountainous regions), and suckler farming (cattle and sheep, down into the valleys). These production systems are of interest because they employ practices respectful of the environment and local biodiversity. We conducted observations of 73 cattle suckler farms (12 of which use organic agriculture) located in the Massif Central.

Comparative diet selection by cattle and sheep grazing two contrasting heathland communities

Journal Articles & Books
Décembre, 2009

In the UK the funding mechanism for moorland restoration is being implemented primarily through agri-environment schemes, yet to date remarkably few comparative grazing studies with domesticated livestock have been conducted on this type of vegetation community. In this experiment the diet composition of four groups of animals grazing heathland swards with low (8%) and high (61%) percentages of cover of Calluna vulgaris was estimated from faeces profiles of n-alkanes and long-chain fatty alcohols.

Vegetation traits and soil properties in response to utilization patterns of grassland in Hulun Buir City, Inner Mongolia, China

Journal Articles & Books
Décembre, 2014
Chine

Numerous studies have focused on vegetation traits and soil properties in grassland, few of which concerned about effects of human utilization patterns on grassland yet. Thus, this study hypothesized that human disturbance (e.g., grazing, mowing and fencing) triggered significant variation of biomass partitioning and carbon reallocation. Besides, there existed some differences of species diversity and soil fertility.

Does the strength of facilitation by nurse shrubs depend on grazing resistance of tree saplings

Journal Articles & Books
Décembre, 2009

Facilitation of tree regeneration by nurse shrubs that offer protection against large herbivores is an important driver of wood-pasture dynamics. Here we asked whether the response to facilitation by nurse shrubs depends on the grazing resistance of the protégé saplings. We experimentally tested the protective effects of the thorny Rosa rubiginosa on browsing frequency, survival, and biomass change of saplings of two species-groups, presumably differing in grazing resistance: the coniferous Abies alba and Picea abies and the deciduous Acer pseudoplatanus and Fagus sylvatica saplings.

Rodent population management at Kansas City International Airport

Journal Articles & Books
Décembre, 2011
États-Unis d'Amérique

Birds pose serious hazards at United States airports because of the potential for collisions with aircraft. Raptors, in particular, are hazardous to aircraft safety due to their size, hunting behavior, and hovering and soaring habits. Reduction of rodent populations at an airport may decrease raptor populations in the area and, therefore, reduce risk that raptors pose to aircraft. Rodent populations can be reduced by population management (i.e., use of rodenticides) or by habitat management (i.e., vegetation and land-use management) that reduces the area’s carrying capacity for rodents.

Grass-to-tree facilitation in an arid grazed environment (Aïr Mountains, Sahara)

Journal Articles & Books
Décembre, 2009
Niger

The scarcity of tree regeneration is a major concern for the long-term conservation of tree cover in the Aïr-Ténéré Nature Reserve (Sahara, Niger), and the causes of this shortage are poorly understood. We raised the hypothesis that livestock pressure is a key-factor in the mortality of tree seedlings and that facilitation processes among plants may enhance tree regeneration. We tested whether the tussock grass Panicum turgidum could facilitate the regeneration of a keystone tree species, Acacia tortilis var. raddiana, under a grazing regime.

Pastoralism, sustainability, and marketing. A review

Journal Articles & Books
Décembre, 2014

Pastoralism is a highly traditional production system for livestock and livestock products. Under the surface of a seeming stability a variety of pressures of the modern time all seem to accumulate to put the sustainability of the pastoralist production system to the test. Population growth and growing demand for meat, put pressure on the natural resources used by pastoralists because the grazing lands that are saved from encroachment or conversion into arable lands, may be overexploited. Changing climatic conditions, such as frequent droughts, put even more pressure on the system.

Identifying plant species and communities across environmental gradients in the Western Himalayas: Method development and conservation use

Journal Articles & Books
Décembre, 2013

Phytosociological attributes of plant species and associated environmental factors were measured in order to identify the environmental gradients of major plant communities in the Naran Valley, Himalayas. The valley occupies a distinctive geographical setting on the edge of the Western Himalaya near the Hindukush range and supports a high biodiversity; pastoralism is the main land use. There have been no previous quantitative ecological studies in this region.

Principles and guidelines for managing cattle grazing in the grazing lands of northern Australia: stocking rates, pasture resting, prescribed fire, paddock size and water points – a review

Journal Articles & Books
Décembre, 2014
Australie

Beef cattle grazing is the dominant land use in the extensive tropical and sub-tropical rangelands of northern Australia. Despite the considerable knowledge on land and herd management gained from both research and practical experience, the adoption of improved management is limited by an inability to predict how changes in practices and combinations of practices will affect cattle production, economic returns and resource condition.