Downward Migration of Coastal Conifers as a Response to Recent Land Emergence in Eastern Hudson Bay, Québec
Abstract Postglacial uplift in the eastern Hudson Bay area is among the most rapid in the world (300 m during the last 8000 yr). Although emergence curves based on 14 C-dated raised shorelines give a consistent basis for modeling relative sea-level changes, such a low-resolution dating method is ina...
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Cambridge University Press (CUP)
1993
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Online Access: | http://dx.doi.org/10.1006/qres.1993.1058 http://api.elsevier.com/content/article/PII:S0033589483710586?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589483710586?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400034670 |
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crcambridgeupr:10.1006/qres.1993.1058 2024-06-09T07:46:35+00:00 Downward Migration of Coastal Conifers as a Response to Recent Land Emergence in Eastern Hudson Bay, Québec Bégin, Yves Bérubé, Dominique Grégoire, Martin 1993 http://dx.doi.org/10.1006/qres.1993.1058 http://api.elsevier.com/content/article/PII:S0033589483710586?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589483710586?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400034670 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 40, issue 1, page 81-88 ISSN 0033-5894 1096-0287 journal-article 1993 crcambridgeupr https://doi.org/10.1006/qres.1993.1058 2024-05-15T13:05:53Z Abstract Postglacial uplift in the eastern Hudson Bay area is among the most rapid in the world (300 m during the last 8000 yr). Although emergence curves based on 14 C-dated raised shorelines give a consistent basis for modeling relative sea-level changes, such a low-resolution dating method is inappropriate for estimating trends over recent decades. A major downward displacement of white spruce ( Picea glauca (Moench) Voss) and tamarack ( Larix laricina (DuRoi) K. Koch) occurred on protected shores as a response to shoreline retreat during this century. Analysis of the age distribution of trees indicates a progradation of white spruce and tamarack on gently sloping terrain ranging from 1.3 and 2.6 cm/yr, respectively, toward the sea. Improvement of climatic conditions during the 20th century favored such expansion which was probably faster than the real land emergence rates, but recent episodes of high water levels caused regression of forest margins over the highly exposed shores. Nevertheless, the downward trend of the treeline over this century substantiates the projections of 14 C-dated coastal emergence curves during the modern period (1.0 to 1.3 cm/yr) by providing an estimate of the maximum rates of shoreline retreat. Article in Journal/Newspaper Hudson Bay Cambridge University Press Hudson Hudson Bay Tamarack ENVELOPE(-121.170,-121.170,57.650,57.650) Quaternary Research 40 1 81 88 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract Postglacial uplift in the eastern Hudson Bay area is among the most rapid in the world (300 m during the last 8000 yr). Although emergence curves based on 14 C-dated raised shorelines give a consistent basis for modeling relative sea-level changes, such a low-resolution dating method is inappropriate for estimating trends over recent decades. A major downward displacement of white spruce ( Picea glauca (Moench) Voss) and tamarack ( Larix laricina (DuRoi) K. Koch) occurred on protected shores as a response to shoreline retreat during this century. Analysis of the age distribution of trees indicates a progradation of white spruce and tamarack on gently sloping terrain ranging from 1.3 and 2.6 cm/yr, respectively, toward the sea. Improvement of climatic conditions during the 20th century favored such expansion which was probably faster than the real land emergence rates, but recent episodes of high water levels caused regression of forest margins over the highly exposed shores. Nevertheless, the downward trend of the treeline over this century substantiates the projections of 14 C-dated coastal emergence curves during the modern period (1.0 to 1.3 cm/yr) by providing an estimate of the maximum rates of shoreline retreat. |
format |
Article in Journal/Newspaper |
author |
Bégin, Yves Bérubé, Dominique Grégoire, Martin |
spellingShingle |
Bégin, Yves Bérubé, Dominique Grégoire, Martin Downward Migration of Coastal Conifers as a Response to Recent Land Emergence in Eastern Hudson Bay, Québec |
author_facet |
Bégin, Yves Bérubé, Dominique Grégoire, Martin |
author_sort |
Bégin, Yves |
title |
Downward Migration of Coastal Conifers as a Response to Recent Land Emergence in Eastern Hudson Bay, Québec |
title_short |
Downward Migration of Coastal Conifers as a Response to Recent Land Emergence in Eastern Hudson Bay, Québec |
title_full |
Downward Migration of Coastal Conifers as a Response to Recent Land Emergence in Eastern Hudson Bay, Québec |
title_fullStr |
Downward Migration of Coastal Conifers as a Response to Recent Land Emergence in Eastern Hudson Bay, Québec |
title_full_unstemmed |
Downward Migration of Coastal Conifers as a Response to Recent Land Emergence in Eastern Hudson Bay, Québec |
title_sort |
downward migration of coastal conifers as a response to recent land emergence in eastern hudson bay, québec |
publisher |
Cambridge University Press (CUP) |
publishDate |
1993 |
url |
http://dx.doi.org/10.1006/qres.1993.1058 http://api.elsevier.com/content/article/PII:S0033589483710586?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589483710586?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400034670 |
long_lat |
ENVELOPE(-121.170,-121.170,57.650,57.650) |
geographic |
Hudson Hudson Bay Tamarack |
geographic_facet |
Hudson Hudson Bay Tamarack |
genre |
Hudson Bay |
genre_facet |
Hudson Bay |
op_source |
Quaternary Research volume 40, issue 1, page 81-88 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1006/qres.1993.1058 |
container_title |
Quaternary Research |
container_volume |
40 |
container_issue |
1 |
container_start_page |
81 |
op_container_end_page |
88 |
_version_ |
1801376537850675200 |