La végétation de l'escarpement d'Eardley, parc de la Gatineau, Québec

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Abstract
The vegetation of the Eardley Escarpment, in Gatineau Park, was sampled in 69 stands using Whittaker''s methodology. The plant communities, most of which are xeric and dominated by Quercus rubra or Pinus spp. or mesic and dominated by Acer saccharum, are analyzed with indirect and direct ordinations. The analysis is based on the structure and floristic composition of the vegetation, as well as on environmental factors, disturbances, and successional status. The soils are described. The data for 4 meteorological stations were used to interpret microclimate. The spatial distribution of the communities seems influenced mostly by topography and fire disturbances. Two types of oak communities studied, rare or absent elsewhere in Quebec, have affinities with the Midwest.