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Portail d'information géographique

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  • Effects of insularisation on plant species richness in the prairie-forest ecotone
  • 1984
  • Species composition of bird communities and the conservation benefit of large versus small forests
  • 1984
  • The output of sediments and solutes from forested and cultivated clayey drainage basins in Luxembourg in Third Benelux Colloquium, Liege.
  • Bilan sédimentaire de onze bassins-versants forestés et cultivés. La charge en suspension du bassin-versant cultivé de Mosergriecht peut atteindre cinq fois celle du bassin-versant foresté de Keiwelsbaach où la charge soluble est de 50 % et le débit
  • 20 % supérieur. Les hautes teneurs en argiles dispersées sont plus fréquentes dans les bassins-versants forestés où l'écoulement hypodermique intervient dans les macropores et les jointures des sols non perturbés.
  • 1984
  • L'organisation des forêts alluviales dans l'axe rhodanien entre Genève et Lyon| comparaison avec d'autres systèmes fluviaux. (Alluvial forest organization in the Upper Rhone Valley| comparison with other fluvial systems)
  • Fifteen years of observations and collections of data in the alluvial forest of Upper Rhone Valley are used to show the factors which influence riparian vegetation. The structure of the forestal communities depends on topographical, hydrological
  • 1984
  • Processes leading to forest regeneration in a mature rain forest of French Guiana were studied on six plots representing initial stages of regeneration, from 2 to 10 years following clear-cutting.
  • 1984
  • Dynamique des clairières d'une forêt inexploitée (réserves biologiques de la forêt de Fontainebleau) I. Origine et état actuel des ouvertures. (Dynamics of gaps in unexploited forest (biological reserves of the Fontainebleau forest). I. Origin
  • 1984
  • Changes of forest biomass are estimated for time intervals 1860-1900, 1900-1950 and 1950-1980. The estimations are based on the inventory data of the world forest storage. Carbon cycle modelling and a simple equation for mass balance of the stable
  • 1984
  • The different species of rain-forest plants developing starchy tubers were studied around Makokou (N. E. Gabon) and in the Lobaye River district (S. W. Central African Republic). A detailed description of the tuberous parts is given, particularly
  • in wild yams to help to elucidate the taxonomic status of a number of species. The different underground storage structures are considered as adaptive to the rain-forest environment. An estimate of the underground tuber biomass has been made. The benefits
  • 1984
  • Around the Reunion subchronozone, vegetation in the Valle Ricca was dominated by a mountain forest type pointing to cool climatic conditions. In the Lower Rhine Basin vegetation had a slightly warmer character, but was also dominated strongly
  • by a mountain type of forest vegetation, characteristic of cooler summers and higher precipitation than at present. Two warmer periods have been determined in the Central Italian profiles| the youngest around the Olduvai reversal, should correspond
  • 1984
  • Forest expansion in the subalpine zone during the past hundred years, Mount Baker, Washington, U.S.A.
  • 1984
  • Essai sur la dynamique des peuplements de lianes ligneuses d'une forêt du nord-est du Gabon. (The dynamics of woody liana communities in a rain forest of North-East Gabon)
  • 1984
  • Relations entre niche trophique et habitat chez un peuplement de grillons, en mosaïque forêt-savane (Lamto, Côte-d'Ivoire). (Relationships between trophic niche and habitat for crikets populations, in forest and savanna (Lamto, Ivory Coast)
  • 1984
  • Breeding and moult cycles of some mountain forest birds in south-central Africa. (Nidification et mue d'oiseaux des forêts de montagne en Afrique centrale du Sud)
  • 1984
  • An attempt is made to estimate the relative frequency of synzoochory and endozoochory of seeds by five species of African forest cercopithecides using 250 stomach contents from wild monkeys hunted by native poachers around Makokou, NE Gabon
  • 1984
  • diagrams show significant isolation effects of roads on population of forest-dwelling mice (Apodemus flavicollis) and carabid beetles.
  • 1984
  • of biotopes (forests, saline environments, freshwater marshes, dunes). The sector: the relative geographical isolation of the Languedoc wetlands, and man induced environmental changes, can explain their lower species richness, as compared to the Grande
  • 1984
  • The drought deciduous lowland forest of the Caribbean coast near Santa Marta (Columbia) has been investigated for biomass, leaf area index (LAI), and foliage dynamics at three different stands. The physiognomical differences depending
  • 1984