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Resultados de la búsqueda

Mostrando ítems 1 a 9 de 32.
  1. Library Resource
    Artículos de revistas y libros
    Diciembre, 2015
    Burkina Faso, Kenya, El Salvador, Chile, Guatemala, China, Canadá, Congo, Costa Rica, Uruguay, Rwanda, Uganda, Colombia, Ecuador, Brasil, Ghana

    La publicación de este número de Unasylva coincide con dos importantes acontecimientos para el sector forestal. Las 196 Partes en la Convención Marco de las Naciones Unidas sobre el Cambio Climático acaban de reunirse en París en la Conferencia sobre el Cambio Climático para negociar un importante acuerdo sobre el clima. También, en París, el Foro Mundial de Paisajes 2015 es sede de debates de alto nivel sobre investigación y políticas relativas al uso de la tierra. La restauración de bosques y paisajes es una pieza clave de este rompecabezas.

  2. Library Resource
    Artículos de revistas y libros
    Diciembre, 2015
    Honduras, Estados Unidos de América, España, Alemania, Perú, Reino Unido, China, Etiopía, República de Corea, Suiza, Costa Rica, Lesotho, Viet Nam, Madagascar, Tanzania, Países Bajos, Brasil, Canadá

    Forest and landscape restoration is a key issue in the ongoing discussions at the Paris Climate Change Conference, convened to broker a game-changing agreement on climate change. On a planet where the mark of human activity is almost ubiquitous, restoration is by necessity a concept that has to take into account human well-being and ongoing change. In addition, in order to succeed in the long term, forest and landscape restoration initiatives will need to successfully engage a range of stakeholders, from policy-makers to local communities and from governments to private actors.

  3. Library Resource
    Artículos de revistas y libros
    Diciembre, 2015
    Burkina Faso, Honduras, Kenya, El Salvador, Guatemala, Zimbabwe, Canadá, Congo, Costa Rica, Níger, Rwanda, Lesotho, Madagascar, Argentina, Brasil, 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.

  4. Library Resource
    Artículos de revistas y libros
    Diciembre, 2011
    África, América central, América del Sur

    The introduction to this set of papers highlights four challenges to the large-scale analysis of population growth at protected area edges in Africa and Latin America undertaken by George Wittemyer and colleagues in their 2008 paper published in Science. First, it raises questions about their sampling procedures, given national-level variation in systems of protected area designation and protected area estates. Second, it challenges the largely economic model of migration decisions that underlies their analysis.

  5. Library Resource
    Artículos de revistas y libros
    Diciembre, 2015
    Estados Unidos de América

    Protected areas remain the most commonly used tool for in situ conservation; however growth in the USA's system of public lands has stagnated while private land conservation continues to expand. Easements can provide a range of ecosystem services (ESs), but it is unknown whether conservation easements maintain ES capacities equivalent to public protected areas.

  6. Library Resource
    Artículos de revistas y libros
    Diciembre, 2015
    Malasia, Perú

    Protected area downgrading, downsizing and degazettement (PADDD) is a global phenomenon that has not received formal attention in Reducing Emissions from Deforestation and Forest Degradation (REDD+) policies designed to reduce forest carbon emissions and conserve biodiversity. Here, we examine how PADDD affects deforestation and forest carbon emissions. We documented 174 enacted and 8 proposed PADDD events affecting more than 48,000 km² in three REDD+ priority countries: Democratic Republic of the Congo, Malaysia, and Peru.

  7. Library Resource
    Artículos de revistas y libros
    Diciembre, 2012
    Canadá

    Invasive species are especially problematic when introduced into ecosystems with native congeners. The extent to which niches overlap in space determines whether the introduced species threatens the native one or the native species can escape competition or the effect of control. We compared the spatial distribution in relation to landscape and land-use/ land-cover variables of introduced and native Phragmites australis (common reed) in a landscape of protected freshwater wetlands in Quebec, Canada. Results showed that the wetlands still serve as refuges for native P. australis.

  8. Library Resource
    Artículos de revistas y libros
    Diciembre, 2011
    África, América central, América del Sur

    The introduction to this set of papers highlights four challenges to the large-scale analysis of population growth at protected area edges in Africa and Latin America undertaken by George Wittemyer and colleagues in their 2008 paper published in Science. First, it raises questions about their sampling procedures, given national-level variation in systems of protected area designation and protected area estates. Second, it challenges the largely economic model of migration decisions that underlies their analysis.

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