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Degradation of communal rangelands in South Africa: towards an improved understanding to inform policy

Journal Articles & Books
Décembre, 2013
Afrique du Sud
Afrique australe

In South Africa, the relative extent of range degradation under freehold compared to communal tenure has been strongly debated. We present a perspective on the processes that drive rangeland degradation on land under communal tenure. Our findings are based on literature as well as extensive field work on both old communal lands and ‘released’ areas, where freehold farms have been transferred to communal ownership.

Livestock and the rangeland commons in South Africa's land and agrarian reform

Journal Articles & Books
Décembre, 2013
Afrique du Sud
Afrique australe

Land and agrarian reform has the potential to expand South Africa's rangeland commons and enhance their contribution to the livelihoods of the rural poor, yet to a large extent this has been an opportunity missed. Shifting policy agendas have prioritised private land rights and commercial land uses, seeking to dismantle the racial divide between the white commercial farming areas and the ex-Bantustans by allocating former white farms to black farmers. These agendas and planning models reflect class and gender bias and a poor understanding of common property.

Institutions and governance of communal rangelands in South Africa

Journal Articles & Books
Décembre, 2013
Afrique du Sud
Afrique australe
Afrique

The creation of local institutions with a mandate over land access and control is seen as a prerequisite for successful decentralisation of land tenure and effective local resource management in sub-Saharan Africa. However, with land tenure reform in South Africa currently at a state of legislative impasse, real uncertainty now exists over land rights and governance of rangeland in many communal areas.

Modeling for Prediction of Land Cover Changes Based on Bio-physical and Human Factors in Zagros Mountains, Iran

Journal Articles & Books
Décembre, 2013
Iran

The rapid population growth and ongoing development activities has resulted in natural resources demolition. However, the dynamics of the natural resources in relation to different biophysical and socio-economic factors are still remains poorly understood. The present study investigates the basic natural resources i.e. forest, rangeland and surface water bodies’ status using satellite data for the years 1990, 1998, and 2006, and their change detection in relation to biophysical and socio-economic factors.

Ploughing and grazing alter the spatial patterning of surface soils in a shrub-encroached woodland

Journal Articles & Books
Décembre, 2013

Grazing is known to affect the spatial patterning of soil resources through biologically-mediated processes such as the removal of plant biomass and deposition of dung. In dense shrublands, grazing is thought to reinforce the concentration of resources around shrubs (fertile island effect) by enhancing the movement of resources from the interspace to the shrub hummocks. Shrub removal practices such as ploughing, which is commonly used to manage dense shrub patches, has unknown impacts on the distribution of soil properties.

effects of a deferred grazing system on rangeland vegetation in a north-western, semi-arid region of Tanzania

Journal Articles & Books
Décembre, 2013
Tanzania

The present study assessed the effects of deferred grazing management on rangeland condition using aboveground biomass, vegetation cover and species composition as indicators of range condition. The experiment was based on traditionally conserved exclosures (ngitili). Data were collected in Shinyanga rural and Meatu districts, Tanzania, from October to November 2011. Five grazing strategies were compared: old private ngitili , young private ngitili , old communal ngitili , young communal ngitili and continuously grazed land.

Modelling trace metal background to evaluate anthropogenic contamination in arable soils of south-western France

Journal Articles & Books
Décembre, 2013
France

The trace metal (TM) content in arable soils has been monitored across a region of France characterised by a large proportion of calcareous soils. Within this particular geological context, the objectives were to first determine the natural levels of trace metals in the soils and secondly, to assess which sites were significantly contaminated. Because no universal contamination assessment method is currently available, four different methods were applied and compared in order to facilitate the best diagnosis of contamination.

Assessing impacts of Roads: Application of a Standard Assessment Protocol

Journal Articles & Books
Décembre, 2013
États-Unis d'Amérique

Adaptive management of road networks depends on timely data that accurately reflect the impacts of network impacts on ecosystem processes and associated services. In the absence of reliable data, land managers are left with little more than observations and perceptions to support adaptive management of road-associated disturbances. Roads can negatively impact the soil, hydrologic, plant, and animal processes on which virtually all ecosystem services depend.

Livestock greenhouse gas emissions and mitigation potential in Europe

Journal Articles & Books
Décembre, 2013
Europe

The livestock sector contributes considerably to global greenhouse gas emissions (GHG). Here, for the year 2007 we examined GHG emissions in the EU27 livestock sector and estimated GHG emissions from production and consumption of livestock products; including imports, exports and wastage. We also reviewed available mitigation options and estimated their potential. The focus of this review is on the beef and dairy sector since these contribute 60% of all livestock production emissions.

Harvesting Freely Roaming Public Resources: Can Property Owners Harvest Kangaroos Utilizing Their Land Without Impacting Neighbors?

Journal Articles & Books
Décembre, 2013

In Australian semiarid rangelands, there have been suggestions that kangaroo harvesting should be given much more serious consideration as a supplement or even replacement to income from domestic stock like cattle and sheep. The possibility of kangaroo harvesting ever being economically viable, however, is often dismissed due to the impossibility of constraining these freely roaming animals to a particular property. In this paper, we explore the extent to which landholders do have control of their harvests regardless of the activities on neighboring land.

Conservation Practices for Climate Change Adaptation

Journal Articles & Books
Décembre, 2013
États-Unis d'Amérique

The threat of climate change is a great challenge to sustainable land management (USDA-NRCS, 2010a). Several publications have reported that over the last few decades, rainfall intensities have increased in many parts of the world, including in the United States. Without good, productive soils and the ecosystem services provided by them, the survival of our species will be in jeopardy. The future changes in climate that will drive erosion processes will significantly impact soil erosion rates, with higher projected erosion rates for the United States.

Grazing management or physiography? Factors controlling vegetation recovery in Mediterranean grasslands

Journal Articles & Books
Décembre, 2013
Espagne

Grazing intensification and abandonment are increasing the risk of degradation of Mediterranean grasslands. The development of techniques for monitoring grazing effects on herbaceous vegetation is an essential need for the management of these rangelands. However, the high variability of these systems make physiographical and management effects hard to disentangle and quantify. We present a methodology to support rangeland management and assess grazing effects on environmentally heterogeneous areas, and provide an example of its application in a Mediterranean rangeland in central Spain.