Résultats de la recherche | Land Portal

Résultats de la recherche

Showing items 1 through 9 of 216.
  1. Library Resource
    Articles et Livres
    décembre, 2012
    Argentine

    We assessed the extension of natural habitat conversion into croplands and grazing lands in subtropical NW Argentina and its impact on two key ecosystem functional attributes. We quantified changes in remotely sensed surrogates of aboveground net primary production (ANPP) and seasonality of carbon gains. Both functional attributes are associated with intermediate ecosystem services sensuFisher et al. (2009). Deforestation was estimated based on photointerpretation of Landsat imagery.

  2. Library Resource
    Articles et Livres
    décembre, 2014
    Mexique, États-Unis d'Amérique

    The USDA initiated the Conservation Effects Assessment Project (CEAP) to quantify the environmental benefits of conservation practices at regional and national scales. For this assessment, a sampling and modeling approach is used. This paper provides a technical overview of the modeling approach used in CEAP cropland assessment to estimate the off-site water quality benefits of conservation practices using the Ohio River Basin (ORB) as an example.

  3. Library Resource
    Articles et Livres
    décembre, 2007
    Pérou, Amérique du Sud

    For some fifteen years, dairy cattle farming has been considerably developing in various parts of the Andes. Milk is transformed into cheese or sold fresh, giving rural families a regular income which secures their food supply. The stock-rearing practices in these Andean dairying systems are unrecognized and are often considered, wrongly, as underperforming and inadequate.

  4. Library Resource
    Articles et Livres
    décembre, 2011
    Chili, Amérique du Sud

    Mediterranean ecosystems are global hotspots of biodiversity threaten by human disturbances. Growing evidence indicates that regeneration of Mediterranean forests can be halted under certain circumstances and that successional stages can become notoriously persistent. The Mediterranean sclerophyllous forest in central Chile is been largely transformed into savannas dominated by the invasive legume tree Acacia caven as result of interacting management and ecological factors.

  5. Library Resource
    Articles et Livres
    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.

  6. Library Resource
    Articles et Livres
    décembre, 2014
    Argentine

    Twenty years ago I completed my Master’s work in the Chaco forests of northern Argentina. The native forests are, in fact, rangelands. In addition to livestock grazing, there is timber extraction, wildlife harvest (think tegu lizard cowboy boots), and charcoal production. I took part in a project comparing biodiversity among production systems. A new system promised to reverse biodiversity loss and soil degradation. But it’s a moot point now since much of that forest has been cleared for cropland—the highest rate of tropical forest loss in the world.

  7. Library Resource
    Articles et Livres
    décembre, 1993
    Inde, Chili, Mexique, Italie
  8. Library Resource
    Articles et Livres
    décembre, 2015
    Burkina Faso, Honduras, Kenya, El Salvador, Guatemala, Zimbabwe, Canada, Congo, Costa Rica, Niger, Rwanda, Lesotho, Madagascar, Argentine, Brésil, Ghana

    La publication de ce numéro d’Unasylva coïncide avec deux événements marquants pour les forêts. Les 196 Parties à la Convention-cadre des Nations Unies sur les changements climatiques viennent de se réunir à la Conférence Paris climat 2015 en vue de négocier un accord qui soit en mesure de changer la donne en matière de changement climatique. Toujours à Paris, le Global Landscapes Forum 2015, Forum mondial sur les paysages, a été le théâtre de discussions de haut niveau portant sur la recherche et les politiques qui sous-tendent les questions d’utilisation des terres.

  9. Library Resource
    Articles et Livres
    décembre, 2016
    Nigéria, États-Unis d'Amérique, Espagne, Mali, Allemagne, Chine, Australie, Bolivie, Iran, Éthiopie, Niger, Cameroun, Kenya, Jordanie, Maroc, Ouganda, Italie, République-Unie de Tanzanie, Inde, Tchad, Liban, Roumanie, Mongolie

    The Technical Guide on Pastoralism builds on a number of initiatives and studies from recent years that have shone a light on pastoral governance and land tenure: on the inherent challenges pastoralists face, the shortcomings of governments in securing pastoral tenure, and the emerging examples of success and progress from around the world. This Technical Guide provides solutions to securing pastoral governance and tenure without undermining the inherent, necessary complexity of customary arrangements.

  10. Library Resource
    Rapports et recherches
    décembre, 2015
    Rwanda, Guatemala, Philippines

    Meeting Name: Near East Forestry and Range Commission (NEFRC)
    Meeting symbol/code: FO:NEFRC/2015/9
    Session: Sess. 22

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