GEOSCAN, résultats de la recherche


TitreCanada-wide maps of dominant tree species from remotely sensed and ground data
AuteurPavlic, G; Chen, W; Fernandes, R; Cihlar, J; Price, D T; Latifovic, R; Fraser, R; Leblanc, S G
SourceGeocarto International vol. 22, no. 3, 2007 p. 185-204,
Séries alt.Ressources naturelles Canada, Contribution externe 20181307
ÉditeurInforma UK Limited
Documentpublication en série
Mediapapier; en ligne; numérique
Sujetstélédétection; géophysique
ProgrammeGéosciences de changements climatiques
Résumé(disponible en anglais seulement)
Information on the spatial distribution of dominant tree species is important as input or validation data in large scale ecological studies, such as carbon budget estimation, biodiversity assessment, and vegetation dynamic modelling. We used a 1-km resolution land cover map of Canada produced from 1998 SPOT VGT satellite data as the base map. Fractions of coniferous needleleaf or deciduous broadleaf forests within each 1-km pixel were then estimated by developing relationships with climate using land-cover maps from Landsat images selected as a representative sample. The fraction of coniferous/deciduous forest within each 1-km pixel was further divided into dominant species fractions using species composition information at the sub-ecoregion level, derived from statistics in the Canadian Forest Inventory (CanFI 1991/94 version), from narrative descriptions of ecoregions, and from topographical data. A total of 17 Canada-wide maps of dominant tree species groups at 1 km-resolution were produced. The estimates of this study agree well with CanFI data at the ecoregion level where available, and show good correspondence with published range maps of Canadian tree species.