Aller au contenu principal

page search

IssuesparcoursLandLibrary Resource
There are 2, 146 content items of different types and languages related to parcours on the Land Portal.

parcours

AGROVOC URI:

Displaying 121 - 132 of 1813

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.

Applying ecologically based invasive-plant management

Journal Articles & Books
Décembre, 2010

The need for a unified mechanistic ecological framework that improves our ability to make decisions, predicts vegetation change, guides the implementation of restoration, and fosters learning is substantial and unmet. It is becoming increasingly clear that integrating various types of ecological models into an overall framework has great promise for assisting decision making in invasive-plant management and restoration.

Restoration of Ecosystem Carbon Stocks Following Exclosure Establishment in Communal Grazing Lands in Tigray, Ethiopia

Journal Articles & Books
Décembre, 2011
Éthiopie

Degraded lands are common in human-influenced tropical semiarid areas, and the potential for C sequestration through rehabilitation of these areas is substantial. In this study, we investigated changes in ecosystem C stocks (ECS) after establishing exclosures on degraded communal grazing lands, and identified easily measurable biophysical and management-related factors that can be used to predict ECS restoration in the highlands of Tigray, Ethiopia. We selected replicated (n = 3) 5-, 10-, 15-, and 20-yr-old exclosures and paired each exclosure with an adjacent communal grazing land.

Interactions between elevated atmospheric CO2 and defoliation on North American rangeland plant species at low and high N availability

Journal Articles & Books
Décembre, 2012
États-Unis d'Amérique

Although common disturbances of grazing lands like plant defoliation are expected to affect their sensitivity to increasing atmospheric CO2 concentration, almost no research has been conducted to evaluate how important such effects might be on the direct responses of rangelands to CO2. This growth chamber experiment subjected intact plant–soil cylinders from a Wyoming, USA, prairie to a 3‐way factorial of CO2 (370 vs. 720 μL L−1), defoliation (non‐clipped vs. clipped) and soil nitrogen (control vs. 10 g m−2 added N) under simulated natural climatic conditions.

Contingent Valuation of Woodland-Owner Private Amenities in Spain, Portugal, and California

Journal Articles & Books
Décembre, 2009
Portugal
Espagne

Most of the Mediterranean woodlands in Spain, Portugal, and California are managed as agrosilvopastoral enterprises, producing some combination of livestock, wood, cork products, and crops, as well as wildlife habitat and diverse environmental services. Private amenity benefits to landowners have been suggested as an explanation for high land prices and the persistence of such rangeland enterprises despite apparently marginal cash returns.

Rangeland responses to pastoralists’ grazing management on a Tibetan steppe grassland, Qinghai Province, China

Journal Articles & Books
Décembre, 2016
Chine
Asie

Livestock grazing is the principal land use in arid central Asia, and range degradation is considered a serious problem within much of the high-elevation region of western China termed the Qinghai-Tibetan Plateau (QTP). Rangeland degradation on the QTP is variously attributed to poor livestock management, historical-cultural factors, changing land tenure arrangements or socioeconomic systems, climate change, and damage from small mammals. Few studies have examined currently managed pastures using detailed data capable of isolating fine-scale livestock–vegetation interactions.

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.

Participatory GIS Approach for Assessing Land Suitability for Rainwater Harvesting in an Arid Rangeland Environment

Journal Articles & Books
Décembre, 2012
Jordanie
Afrique septentrionale

The dry rangelands of West Asia and North Africa are fragile and severely degraded due to low rainfall and mismanagement of natural resources. Rainwater harvesting (RWH) interventions are used to increase soil moisture content, vegetation cover, and productivity. However, adoption of rainwater harvesting by communities is slow. To understand adoption constraints and to develop options for sustainable integration of rainwater harvesting, a benchmark watershed was established in the dry rangelands of Jordan.

Assessing Degradation of Abandoned Farmlands for Conservation of the Monte Desert Biome in Argentina

Journal Articles & Books
Décembre, 2014
Argentine

Land abandonment is a major issue worldwide. In Argentina, the Monte Desert is the most arid rangeland, where the traditional conservation practices are based on successional management of areas excluded to disturbances or abandoned. Some areas subjected to this kind of management may be too degraded, and thus require active restoration. Therefore, the aim of this study was to assess whether passive succession-based management is a suitable approach by evaluating the status of land degradation in a protected area after 17–41� years of farming abandonment.

Assessing Transportation Infrastructure Impacts on Rangelands: Test of a Standard Rangeland Assessment Protocol

Journal Articles & Books
Décembre, 2010

Linear disturbances associated with on- and off-road vehicle use on rangelands has increased dramatically throughout the world in recent decades. This increase is due to a variety of factors including increased availability of all-terrain vehicles, infrastructure development (oil, gas, renewable energy, and ex-urban), and recreational activities.

Revolutionary Land Use Change in the 21st Century: Is (Rangeland) Science Relevant?

Journal Articles & Books
Décembre, 2012

Rapidly increasing demand for food, fiber, and fuel together with new technologies and the mobility of global capital are driving revolutionary changes in land use throughout the world. Efforts to increase land productivity include conversion of millions of hectares of rangelands to crop production, including many marginal lands with low resistance and resilience to degradation. Sustaining the productivity of these lands requires careful land use planning and innovative management systems.