Articles
The postglacial vegetational history in the region of Weedon has been studied by pollen analysis of a peat bog and lake sediments. Initial tundra vegetation has been re-placed by the forest, at about 11 000 B.P. Spruce established first, followed by fir stands (10 600 B.P.) and, last, maple communit...
Published in: | Cahiers de géographie du Québec |
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Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | French |
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Département de géographie de l'Université Laval
2005
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Subjects: | |
Online Access: | http://www.erudit.org/fr/revues/cgq/1975-v19-n47-cgq2621/021257ar.pdf https://www.erudit.org/fr/revues/cgq/1975-v19-n47-cgq2621/021257ar.pdf https://www.erudit.org/revue/cgq/1975/v19/n47/021257ar.pdf https://id.erudit.org/iderudit/021257ar https://doi.org/10.7202/021257ar https://core.ac.uk/display/59283592 https://www.erudit.org/fr/revues/cgq/1975-v19-n47-cgq2621/021257ar/ https://academic.microsoft.com/#/detail/2162335523 |
Summary: | The postglacial vegetational history in the region of Weedon has been studied by pollen analysis of a peat bog and lake sediments. Initial tundra vegetation has been re-placed by the forest, at about 11 000 B.P. Spruce established first, followed by fir stands (10 600 B.P.) and, last, maple communities (9 000 B.P) on the mesic sites. The yellow birch {Betula alleghaniensis) seems to have experienced a delay in its immigration to the region. This contributed to allow the existence of an original type of initial maple community, in which the usual trees now found with maple were then lacking. L'analyse pollinique des sédiments d'une tourbière et d'un lac situés près du village de Weedon révèle les traits suivants de l'histoire postglaciaire de la végétation. Un peu avant 11 000 ans, la toundra est remplacée par la forêt d'épinettes qui formait une couverture dense jusque vers 10 600 avant aujourd'hui. La sapinière a pris la relève pour être remplacée, vers 9 000 ans, par l'érablière qui domine encore le paysage actuellement. Le bouleau jaune (Betula alleghaniensis) semble avoir accusé un retard d'immigration, et entraîné ainsi la construction d'un type original d'érablière initiale dans lequel on ne retrouve aucune des essences qui accompagnent généralement ce groupement de nos jours. |
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