Résultats de la recherche | Land Portal

Résultats de la recherche

Showing items 1 through 9 of 123.
  1. Library Resource

    Volume 10 Issue 2

    Publication évaluée par des pairs
    février, 2021
    Bosnie-Herzégovine, Colombie, États-Unis d'Amérique

    Cattle grazing and fire are common types of management on natural ecosystems, generating several threats to the conservation of native vegetation (e.g., changes in species richness, cover, and abundance, mainly of bovine-palatable species). In this work, we analysed the response of the structure and composition of vegetation managed with different cattle stocking rates and fire in the savanna ecosystems of Colombia. The study was located in the eastern area of the Llanos region, where savannas were subjected to grazing and burning.

  2. Library Resource

    Volume 10 Issue 2

    Publication évaluée par des pairs
    février, 2021
    Canada, Colombie, République tchèque, Espagne, France, Royaume-Uni, Italie, États-Unis d'Amérique, Afrique du Sud, Afrique australe, Europe

    Today, the design and remodeling of urban environments is being sought in order to achieve green, healthy, and sustainable cities. The effect of air pollution in cities due to vehicle combustion gases is an important part of the problem. Due to the indirect effect caused by the Covid-19 pandemic, political powers in Europe have imposed confinement measures for citizens by imposing movement restrictions in large cities. This indirect measure has given us a laboratory to show how the reduction in vehicle circulation affects in a short time the levels of air pollution in cities.

  3. Library Resource
    Land Journal Volume 9 Issue 11 cover image

    Volume 9 Issue 11

    Publication évaluée par des pairs
    novembre, 2020
    Colombie, États-Unis d'Amérique, Espagne

    In line with the Urban Agenda for the EU, this article highlights the importance of local actions in the conservation of biodiversity, both through specific activities and by increasing the availability of information. As such, the policies and projects related to the conservation of biodiversity have been analyzed here at different levels and, in particular, the initiatives undertaken in the Madrid Region, Spain.

  4. Library Resource

    Volume 9 Issue 9

    Publication évaluée par des pairs
    septembre, 2020
    Brésil, Colombie, Espagne, Italie, Mexique, Norvège, Porto Rico, Portugal, États-Unis d'Amérique, Venezuela

    Since the middle of the 20th century, irrigation in the southeast of Spain has displayed significant productive growth based on the intensive use of the scarce water resources in the area and the contribution of river flows from the hydrographic basin of the Tagus River to the hydrographic basin of the Segura River. Despite high levels of efficiency in the water use from the new irrigation systems, the water deficit has only intensified in recent years.

  5. Library Resource

    Volume 9 Issue 9

    Publication évaluée par des pairs
    septembre, 2020
    Colombie, Espagne, Fédération de Russie, Suède, États-Unis d'Amérique

    In the last decade, efforts to re-localize the food system have been gaining ground in a way that is intended to induce changes in the primary sector, thereby improving its conditions and sustainability. The European Union has identified food as one of the ten key sectors with outstanding potential for an ecological transition, and public procurement of (organic) food as an appropriate policy to foster agricultural development and support small farmers.

  6. Library Resource

    Volume 9 Issue 9

    Publication évaluée par des pairs
    septembre, 2020
    Colombie, Portugal, États-Unis d'Amérique

    Nine Latin American countries plan to use silvopastoral practices—incorporating trees into grazing lands—to mitigate climate change. However, the cumulative potential of scaling up silvopastoral systems at national levels is not well quantified. Here, we combined previously published tree cover data based on 250 m resolution MODIS satellite remote sensing imagery for 2000–2017 with ecofloristic zone carbon stock estimates to calculate historical and potential future tree biomass carbon storage in Colombian grasslands.

  7. Library Resource

    Volume 9 Issue 8

    Publication évaluée par des pairs
    août, 2020
    Colombie, Espagne, États-Unis d'Amérique

    Cultural ecosystem services are gaining increasing attention in the scientific literature, despite the conceptual and methodological difficulties associated with their assessment. We used a participatory GIS method to map and assess three cultural ecosystem services, namely, (a) outdoor recreation, (b) aesthetic enjoyment, and (c) sense of place, in the Madrid region (Spain). The main goal of the study was to identify cultural ecosystem service hotspots in the region and to explore the relationships among the three ecosystem services mapped.

  8. Library Resource
    Articles et Livres
    décembre, 2010
    Chili, Pérou, Uruguay, Équateur, Colombie, Brésil, Bolivie, Italie, Mexique, Panama

    Information on water use is required for political, economic and academic decision making on issues affecting everyone?s life. Owing to fi nancial constraints, it is diffi cult to have complete and comprehensive information on everything related to water. Techniques and methodologies are, therefore, used to affordably maximize control. To improve understanding of the different techniques and methodologies used to generate information, the AQUASTAT team sent thematic questionnaires to approximately 170 countries in April 2009.

  9. Library Resource
    Articles et Livres
    juin, 2018
    Nicaragua, Argentine, Bolivie, Brésil, Chili, Colombie, Uruguay, Canada, Indonésie, Inde, Italie, Monténégro, Portugal, Pays-Bas

    El manual proporciona información sobre los procedimientos que siguen las brigadas de campo para realizar el establecimiento de los conglomerados y parcelas permanentes del Inventario Forestal Nacional (IFN). Asimismo, suministra información acerca de la planificación y ejecución de cada una de las fases que contempla el operativo, describe los métodos, técnicas e instrumentos que se emplean en la toma de los datos, y detalla el proceso de diligenciamiento de los formatos creados por IDEAM para registrar los datos e información de campo.

  10. Library Resource
    Articles et Livres
    mars, 2018
    France, Chine, Espagne, Chili, El Salvador, Suède, Allemagne, Pérou, Italie, Indonésie, Australie, Colombie, Canada, Argentine, Bolivie, Équateur, Panama, Mexique, Brésil, Autriche

    En 2003, la Unión Europea (UE) lanzo el Plan de acción sobre aplicación de las leyes, gobernanza y comercio forestal (Plan de acción FLEGT) para combatir la tala ilegal de madera, promover el consumo y la producción de madera de origen legal y, en última instancia, contribuir al manejo forestal sostenible y la reducción de la pobreza.

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