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role of prescribed burn associations in the application of prescribed fires in rangeland ecosystems

Journal Articles & Books
Décembre, 2014

Although the ecological thresholds for restoring fire-adapted ecosystems back to their original state are better understood than in the past, the key hurdle to reintroducing historical fire regimes at landscape scales is a social one. The objectives of this study were to assess the human dimensions of prescribed fire and evaluate the role of Prescribed Burn Associations (PBAs) in promoting the adoption of prescribed fire at the landscape scale. The study was conducted in 12 counties in Texas, consisting of clusters of four counties in each of three ecoregions.

Complex effects of fragmentation on remnant woodland plant communities of a rapidly urbanizing biodiversity hotspot

Journal Articles & Books
Décembre, 2014

In many cities worldwide, urbanization is leading to the rapid and extensive fragmentation of native vegetation into small and scattered urban remnants. We investigated the effects of fragmentation on plant species richness and abundance in 30 remnant Banksia woodlands in the rapidly expanding city of Perth, located in the southwestern Australian global biodiversity hotspot.

Monitoring of Livestock Grazing Effects on Bureau of Land Management Land

Journal Articles & Books
Décembre, 2014
États-Unis d'Amérique

Public land management agencies, such as the Bureau of Land Management (BLM), are charged with managing rangelands throughout the western United States for multiple uses, such as livestock grazing and conservation of sensitive species and their habitats. Monitoring of condition and trends of these rangelands, particularly with respect to effects of livestock grazing, provides critical information for effective management of these multiuse landscapes.

interplay of land forms and disturbance intensity drive the floristic and functional changes in the dry Puna pastoral systems (southern Peruvian Andes)

Journal Articles & Books
Décembre, 2014

In the Peruvian highlands, climate change and inadequate management are causing land degradation and collapse of the pastoral system. Our research project was aimed at assessing the impact of grazing on dry Puna ecosystem, as understanding and predicting vegetation changes in harsh environments in the face of different disturbance regimes is required for aware and effective management. The study area was the Salinas and Aguada Blanca National Reserve. Two experimental areas were selected, characterized by deep soils with gentle slopes and by shallow soils with steeper slopes.

ecosystem services perspective on brush management: research priorities for competing land‐use objectives

Journal Articles & Books
Décembre, 2014

The vegetation of semi‐arid and arid landscapes is often comprised of mixtures of herbaceous and woody vegetation. Since the early 1900s, shifts from herbaceous to woody plant dominance, termed woody plant encroachment and widely regarded as a state change, have occurred world‐wide. This shift presents challenges to the conservation of grassland and savanna ecosystems and to animal production in commercial ranching systems and pastoral societies.

influence of South Africa's post-apartheid land reform policies on bush encroachment and range condition: a case study of Fort Beaufort's municipal commonage

Journal Articles & Books
Décembre, 2014
Afrique du Sud
Afrique australe

We examined the effect of changes in land use and land tenure on bush encroachment and vegetation condition. An analysis of aerial photographs from three time steps (1949, 1985 and 2004) was used to document changes in woody plant density in different vegetation types on commonage and an adjacent commercial farm in Fort Beaufort, South Africa. Rangeland condition was assessed in different vegetation units of the area and woody plant density was related to distance from urban settlement.

Human and wildlife usage of a protected area buffer zone in an area of high immigration

Journal Articles & Books
Décembre, 2014
Tanzania

Population growth near protected areas threatens the capacity of such areas for biodiversity conservation. Protected areas may even encourage growth by providing economic benefits that attract migrants. Consequently, understanding the relationships between human demographics and biodiversity is important for conservation. We studied a community-governed Wildlife Management Area bordering the Selous Game Reserve in Tanzania, set up to benefit local people and the subsistence rural economy. Annual population growth in this area is 5%.

Modelling habitat suitability in the Aquatic Warbler wintering ground Djoudj National Park area in Senegal

Journal Articles & Books
Décembre, 2014
Sénégal

The only well-studied wintering ground of the globally threatened Aquatic Warbler Acrocephalus paludicola is the ‘Djoudj area’ in Senegal. This study identifies potential Aquatic Warbler habitats within that area and gives an estimate of the size of the local wintering population. A land-cover map was generated by classifying high-resolution satellite images. Overlaying it with presence–absence data from field surveys and using logistic regression models (GLMM), we derived the presence probability of the Aquatic Warbler in the study area.

Conversion of grazing land into Grevillea robusta plantation and exclosure: impacts on soil nutrients and soil organic carbon

Journal Articles & Books
Décembre, 2014

Different studies have shown that the effect of land use conversion on soil nutrients and soil organic carbon (SOC) is variable, which indicates that more investigations that focus on different specific geographical locations and land use types are required. The objectives of this study were (1) to evaluate the effect of grazing land (GL) conversion into Grevillea robusta plantation and exclosure (EX) on soil nutrients and soil organic carbon (SOC) and (2) to examine the impact of soil organic matter (SOM) on soil nutrients.

Opportunities for fire and carbon on pastoral properties in the savanna rangelands: perspectives from the Indigenous Land Corporation and the Northern Territory Cattlemen’s Association

Journal Articles & Books
Décembre, 2014
Australie

Understanding both the carbon dynamics within Australia’s northern savannas and the opportunities presented through diversification into carbon markets is of relevance to pastoral land managers both in Australia and globally. The Indigenous Land Corporation (ILC), through its role in assisting Indigenous people to acquire and manage land for cultural, social, environmental and economic benefits, has operated in the carbon market and is keen to continue working with its partners to explore the opportunities to develop and broaden this further.

Aeolian processes and landscape change under human disturbances on the Sonid grassland of inner Mongolian Plateau, northern China

Journal Articles & Books
Décembre, 2014
Chine

Based on remote sensing monitoring, observations and experiments in wind tunnel and field, aeolian processes and landscape change of the Sonid grassland of Inner Mongolia Plateau in northern China were explored in this paper. Aeolian process was very strong and seriously affected by human disturbances on the Sonid grassland of Inner Mongolia Plateau. Sand transport rate of grassland increased quickly with the increase of desertification severities, especially at the very severe desertification stage of sand sheet emergence.

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.