Vegetation and Climate of Maritime Canada 6000 Years BP: A Synthesis
Environmental conditions (vegetation and climate) of Maritime Canada are reconstructed as a regional contribution to a national synthesis on the paleoenvironment of Canada 6000 yr BP. Ten new sites, including three complete sequences and seven short sequences bracketing the 6 ka period, are added to...
| Published in: | Géographie physique et Quaternaire |
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| Main Authors: | , |
| Format: | Text |
| Language: | English |
| Published: |
Les Presses de l'Université de Montréal
1995
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| Subjects: | |
| Online Access: | http://id.erudit.org/iderudit/033034ar https://doi.org/10.7202/033034ar |
| Summary: | Environmental conditions (vegetation and climate) of Maritime Canada are reconstructed as a regional contribution to a national synthesis on the paleoenvironment of Canada 6000 yr BP. Ten new sites, including three complete sequences and seven short sequences bracketing the 6 ka period, are added to the existing pollen dataset for this region. The vegetation prevalent 6000 yr BP in New Brunswick was a mixed coniferous-deciduous forest with pine, mostly white pine (Pinus strobus) in the northwest, and a mixed coniferous-deciduous forest with hemlock (Tsuga canadensis) in the south and southeast. In the northwest, fir (Abies) replaced pine at high elevations and a boreal forest grew on the New Brunswick Highlands. The dominant vegetation at 6000 yr BP in Prince Edward Island and Nova Scotia was a mixed coniferous-deciduous forest with hemlock dominating. Cape Breton Island was covered by a mixed coniferous-deciduous forest with pine and/or fir, except for the southern part of the Island where hemlock was probably present. Analysis of the fossil sites indicate that a warm-dry period influenced the composition of the vegetation 6000 yr BP. On a fait la reconstitution des conditions environnementales des Maritimes dans le cadre d'une synthèse des paléoenvironnements au Canada à 6000 BP. Dix nouveaux sites, comprenant trois séquences complètes et sept courtes séquences couvrant la période de 6000 BP, ont été ajoutés aux données polliniques existantes sur la région. La végétation dominante à 6000 BP au Nouveau-Brunswick est celle de la forêt mixte de conifères et de feuillus à prédominance de pin, surtout le pin blanc (Pinus strobus) au nord-ouest, et celle de la forêt mixte de conifères et de feuillus dominée par la pruche (Tsuga canadensis), au sud et au sud-est. Dans le nord-ouest, le sapin (Abies) a remplacé le pin en altitude et la forêt boréale s'est implantée sur les hautes terres du Nouveau-Brunswick. À 6000 BP, la végétation dominante à l'Île-du-Prince-Édouard et en Nouvelle-Ecosse était celle de la forêt ... |
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