Résultats de la recherche | Land Portal

Résultats de la recherche

Showing items 1 through 9 of 204.
  1. Library Resource
    Documents de politique et mémoires
    décembre, 2005
    Serbie, Monténégro

    Genetic equilibrium of polymorphic enzyme loci from four natural populations of Cheilosia vernalis was tested. The study populations were from different regions of the Balkan Peninsula: Mediterranean area (Morinj, Montenegro: CVMOR), low mountain in the Pannonian plain (Fruska Gora, Serbia: CVFG), and two high Dinaric mountains (Durmitor, Montenegro: CVDUR; and Kopaonik, Serbia: CVKOP). Out of twelve enzyme loci analyzed for genetic variability, only four to six were polymorphic in the studied populations.

  2. Library Resource
    Articles et Livres
    octobre, 2005
    Brésil, Amérique centrale, Amérique du Sud

    In developing countries across the globe the impact of livestock on deforestation levels has
    been profound. This paper explores the role of the cattle industry in household decision
    making for small landholders in the Brazilian Amazon. Important inquiries raised in the
    literature are addressed, including the determinants of the co-evolution of deforestation and cattle herds, the possibility of production specialization, and the role of cattle in household livelihoods. Panel data suggest that households have changed focus from crop

  3. Library Resource
    Documents de politique et mémoires
    octobre, 2005

    In seeking to value environmental amenities and public goods, individuals often have trouble trading off the (vague) amenity or good against a monetary measure. Valuation in these circumstances can best be described as fuzzy in terms of the amenity valued, perceptions of property rights, and the numbers chosen to reflect values. In this paper, we apply fuzzy logic to contingent valuation, employing a fuzzy clustering approach for incorporating preference uncertainty obtained from a follow-up certainty confidence question.

  4. Library Resource
    Articles et Livres
    décembre, 2005
    Afrique

    Tropical land cover change experiments with fixed sea-surface temperatures (SSTs) and with an interactive ocean are compared to assess the relevance of including the ocean system in sensitivity studies to land surface conditions. The results show that the local response to deforestation is similar with fixed and simulated SSTs. Over Amazonia, all experiments simulate a comparable decrease in precipitation and no change in moisture convergence, implying that there is only a change in local water recycling.

  5. Library Resource
    Articles et Livres
    décembre, 2005

    The Baekdudaegan Mountain Range is a backbone of the Korean Peninsula which has special spiritual and sentimental significance for Koreans and significant ecological value to diverse organisms. Despite the importance of this region, however, the natural environment of Baekdudaegan has been severely threatened by a variety of human activity and tremendous forest fires. To make management and restoration plans for the deforested areas, it is necessary to investigate quantitatively such natural and human-induced physical changes.

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