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Mostrando ítems 1 a 9 de 3.
  1. Library Resource
    Artículos de revistas y libros
    Diciembre, 2009
    Nigeria

    Frequent alteration in land cover often leads to decreased stability of ecosystems which can also increase the vulnerability of rural communities to externalities of environmental change. This study carried out in parts of the coast of southwestern Nigeria utilized topographic base maps and two-time Landsat TM imageries to assess the trend in land cover changes and ecosystems degradation for the three time periods 1965, 1986 and 2001. Remote sensing, geographic information systems and landscape pattern analysis were employed for data processing and analysis.

  2. Library Resource
    Artículos de revistas y libros
    Diciembre, 2012
    Nigeria

    The study assessed poverty in rural areas of Ogun State, Nigeria through the food energy (calorie) intake approach. A sample of 60 households (comprising of 346 members) were selected using a multistage sampling technique and were interviewed with the aid of well‐structured questionnaire. Data were analysed using nutrient estimation techniques, cost of calorie method and poverty index. The estimated food poverty line was 64.72 naira.

  3. Library Resource
    Artículos de revistas y libros
    Diciembre, 2009
    África occidental

    Modern global temperature and land cover and projected future temperatures suggest that tropical forest species will be particularly sensitive to global warming. Given a moderate greenhouse gas emissions scenario, fully 75% of the tropical forests present in 2000 will experience mean annual temperatures in 2100 that are greater than the highest mean annual temperature that supports closed-canopy forest today. Temperature-sensitive species might extend their ranges to cool refuges, defined here as areas where temperatures projected for 2100 match 1960s temperatures in the modern range.

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