Résultats de la recherche | Land Portal

Résultats de la recherche

Showing items 1 through 9 of 42.
  1. Library Resource
    Articles et Livres
    décembre, 2003
    Honduras

    This study evaluates the relationship between landscape accessibility and land cover change in Western Honduras, and demonstrates how these relationships are influenced by social and economic processes of land use change in the region. The study area presents a complex mosaic of land cover change processes that involve approximately equal amounts of reforestation and deforestation.

  2. Library Resource
    Articles et Livres
    décembre, 2007

    John Steinbeck's 1939 novel can be given a reading that links events and the mentality of characters to mainstream schools of liberal and neo-liberal political theory: libertarianism, egalitarianism, and utilitarianism. Each of these schools is sketched in outline and applied to topics in rural political culture.

  3. Library Resource
    Articles et Livres
    décembre, 2001
    Suède

    This paper explores the possibility of using non-geometric cadastral maps from the 17th and 18th century together with aerial photographs from 1945 and 1981 to analyse land-cover change in south-east Sweden. Habitats rich in plant species in the European rural landscape seem to be correlated with a long continuity of management. Accurate spatial data from historical data sources are fundamental to understand patterns of vegetation and biodiversity in the present-day landscape.

  4. Library Resource
    Articles et Livres
    décembre, 2006
    Albanie

    In the turmoil of a rapidly changing economy the Albanian government needs accurate and timely information for management of their natural resources and formulation of land-use policies. The transformation of the forestry sector has required major changes in the legal, regulatory and management framework.

  5. Library Resource
    Articles et Livres
    décembre, 2007
    France, Pays-Bas, Belgique, Allemagne, Danemark, Italie, Europe

    Several recent reports on cropland soil organic carbon (SOC) stock changes throughout Europe indicate a general continuing loss of SOC from these soils. As most arable soils in Europe are not in an equilibrium situation because of past changes in land-use and management practices, shifts in both have been suggested to drive this decline of SOC stocks. A lack of data has prevented the unambiguous verification of the contribution of these factors to SOC loss.

  6. Library Resource
    Articles et Livres
    décembre, 2007
    Afrique du Sud, Venezuela, Brésil, Afrique australe

    The conservation of individual plant and animal species has been advanced greatly by the World Conservation Union's (IUCN) development of objective, repeatable, and transparent criteria for assessing extinction risk, which explicitly separate the process of risk assessment from priority-setting. Here we present an analogous procedure for assessing the extinction risk of terrestrial ecosystems, which may complement traditional species-specific risk assessments, or may provide an alternative when only landscape-level data are available.

  7. Library Resource
    Articles et Livres
    décembre, 2007
    États-Unis d'Amérique

    Direct applications of remote sensing thermal infrared (TIR) data in landscape ecological research are rare due to limitations in the sensors, calibration, and difficulty in interpretation. Currently there is a general lack of methodology for examining the relationship between land surface temperatures (LST) derived from TIR data and landscape patterns extracted from optical sensors. A separation of landscapes into values directly related to their scale and signature is a key step.

  8. Library Resource
    Articles et Livres
    décembre, 2006
    Nouvelle-Zélande

    Ecosystem level processes and species interactions have become important concepts in conservation and land management. Despite being New Zealand’s greatest contributors to global diversity, native invertebrates have been largely overlooked in the assessment of land values, and their diversity has often been assumed to reflect native plant diversity without justification. Invertebrates can in fact affect plant species composition, and in ecosystems such as New Zealand’s remaining indigenous and semi-modified tussock grasslands can do so in excess of more conspicuous vertebrate grazers.

  9. Library Resource
    Articles et Livres
    décembre, 2007
    États-Unis d'Amérique

    The environmental setting (e.g., climate, topography, geology) and land use affect stream physical characteristics singly and cumulatively. At broad geographic scales, we determined the importance of environmental setting and land use in explaining variation in stream physical characteristics. We hypothesized that as the spatial scale decreased from national to regional, land use would explain more of the variation in stream physical characteristics because environmental settings become more homogeneous.

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