inscription
PORTAIL D'INFORMATION GÉOGRAPHIQUE

Résultats de la recherche (109 résultats)

Affinez votre recherche

Par Collection Par Auteur Par Date Par Sujet Par Titre
  • Tropical rain forests
  • The following review (1987-1989) covers seven areas of study : microclimate, climate and vegetation change| hydrology| mineral nutrition| forest structure| forest regeneration| herbivory| conservation.
  • 1990
  • An investigation of forest microclimate : the Pasoh Forest Reserve, Negeri Sembilan, Malaysia
  • 1990
  • Atmospheric deposition onto forests. An analysis of the deposition variability by means of throughfall measurements
  • Acid rainfall ; Applied ecology ; Atmospheric pollution ; Europe ; Forest ; Netherlands (The) ; Pollution
  • Recently extensive decline in the quality of forests has been reported in Europe and North-America. The deterioriation of the forests has been associated with the atmospheric deposition of acidifying and eutrophying compounds. The general aim
  • of this thesis is to identify and clarify the spatial and temporal variability of this phenomenon. A detailed study was done in forest stands at the « Veluwe » in the central part of the Netherlands. A more general study was done at an European scale. - (AGD)
  • 1990
  • Study of effects of three chronobiosequences (forest-forest (BB), forest-meadow (BP), forest-culture-forest (BCB)) on soil chemical properties. After 70-80 years of forest stand, BCB still exhibits, in surface layer, traces of previous decades
  • 1990
  • The tropical rain forest : patterns of exploitation and trade
  • 1990
  • Transport for Romania's Carpathian forests : improved accessibility through technological change
  • The opening up of the Romanian forests has involved a number of different transport systems. Technology has been advanced and the problem of inacessible forests has gradually been solved. Many communities were able to expand through the development
  • 1990
  • Farming the forest : managing people and trees in reserved forests in Thailand
  • Agricultural policy ; Agroforestry ; Conflict ; Forest ; Forest management ; Forestry ; Population pressure ; Rational use ; Resource management ; Rural population ; Thailand ; Tropical rain forest
  • 1990
  • Stemflow and throughfall in a tropical dry forest
  • The rainfall received by a small plot of tropical deciduous forest on sand dunes in Veracruz, Mexico, was partitioned into stemflow and throughfall components to determine wether funnelling by stemflow could reduce soil leaching by transmitting
  • 1990
  • Using a forest stand simulation model to examine the ecological and climatic significance of the Late-Quaternary pine-spruce pollen zone in Eastern Virginia, U.S.A.
  • A simulation model of forest dynamics was used to reconstruct the composition and structure of the forests on the Delmarva Peninsula of Virginia, where pollen data were available to test the model, and climate and soils data were available to drive
  • 1990
  • The spring in the forest terrain at Svartberget, Northern Sweden
  • The aim of this study is to illustrate differences between three forest sites with respect to the relationship between the snow cover and the air and soil temperature. During nine years (1980-88) observations have been carried out about
  • this relationship on three points. Two of the points lie on a glacial till slope, one in an old spruce forest and the other in a clear felled area. The third point lies on a clear felled area on level sediment. This study mainly deals with the period when the soils
  • 1990
  • The Maraca Rainforest Project. II. Soil hydrology, nutrient and erosional response to the clearance of terra firme forest, Maraca Island, Roraima, northern Brazil
  • Results and discussion of the experiment carried out on the Ilha de Maraca, to investigate the effects of partial and complete clearance of forest plots on subsurface soil moisture content, tension and water fluxes, overland flow, the production
  • 1990
  • National atlas of Sweden 2. The forests
  • Atlas ; Forest ; Land use ; Sweden ; Thematic map ; Tree species ; Wood industry
  • 1990
  • Forest blowdown and lake acidification
  • Biogeochemistry ; Environment ; Forest ; Geographical information system ; Hydrochemistry ; Lake ; New York State ; Pollution ; Remote sensing ; Sweden ; United States
  • comparison of two geographical distributions, one representing forest blowdown and another representing lake chemistry. Evidence of a temporal association is found at Big Moose Lake and Jerseyfield Lake in New York and the Lygners Vider Plateau of Sweden.
  • 1990
  • Introduction of earthworms to the soil under forest plantations in the Caspian sea region
  • Asian part of USSR ; Biogeochemical cycle ; Forest ; Forest soils ; Geochemistry ; Kazakhstan ; Litter ; Pedogenesis ; Quantitative ecology ; Soil
  • 1990
  • Forest-product use in upland Nepal
  • Deforestation ; Farmer behaviour ; Farming system ; Firewood ; Forest ; Forest resources ; Himalaya ; Mountain ; Nepal ; Rural community ; Village
  • 1990
  • Bibliography ; Biogeography ; Forest ; Mediterranean States ; Mountain ; Taxonomy ; Vegetation
  • 1990
  • A new face on the countryside : Indians, colonists, and slaves in South Atlantic forests, 1500-1800
  • 1990
  • International forest signature workshop.
  • 1990
  • Habitat segregation and regeneration patterns of red fir and mountain hemlock in ecotonal forests, Lassen Volcanic National Park, California
  • 1990
  • The last rain forests : a world conservation atlas.
  • 1990