Mots-clés
Analyse pollinique Bassin-versant Canada Charge en suspension Ecosystème Ecosystème aquatique Erosion des sols Européens Géochimie Palynologie Paléo-environnement Paléomagnétisme Peuplement Prairies Provinces Sédiment lacustre Utilisation agricole du sol Utilisation du sol Variabilité climatique Agricultural land use Aquatic ecosystem Canada Climatic variability Ecosystem Europeans Geochemistry Lacustrine sediment Land use Palaeo-environment Palaeomagnetism Palynology Pollen analysis Prairies Provinces Settlement Soil erosion Suspended load WatershedChanging contributions of suspended sediment sources in small basins resulting from European settlement on the Canadian Prairies
Auteur(s) et Affiliation(s)
DE BOER, D.H.
Dep. Geography, Unjv. Saskatchewan, Saskatoon, Canada
Description :
In the research area, the earliest sediments deposited in the larger lakes predate European settlement, allowing direct evaluation of basin response to settlement. Pre- and post-settlement sediments in a central core were separated on the basis of an increase in Populus pollen associated with the southward advance of the aspen parkland ecotone caused by fire suppression following settlement. This study focuses on sediment characteristics. At present, topsoil is the dominant suspended sediment source in small drainage basins in the field area. The aim of this paper was to investigate whether this has always been the case.
Type de document :
Article de périodique
Source :
Earth surface processes and landforms, issn : 0197-9337, 1997, vol. 22, n°. 7, p. 623-639, Collation : Illustration, Références bibliographiques : 35 ref.
Date :
1997
Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley
Langue :
Anglais
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)