Modifications morphologiques de l'Épinette blanche soumise à la sédimentation éolienne en milieu dunaire, Québec subarctique
The characteristic growth forms of white spruce (Picea glauca (Moench) Voss) were studied within a dune located north of Whapmagoostui (Subarctic Québec). Thirty-two trees (14 living and 18 dead) were excavated and their morphology and ring patterns are described. Adventitious root development at th...
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Language: | French |
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Canadian Science Publishing
1988
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Online Access: | http://dx.doi.org/10.1139/b88-254 http://www.nrcresearchpress.com/doi/pdf/10.1139/b88-254 |
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crcansciencepubl:10.1139/b88-254 2023-12-17T10:50:47+01:00 Modifications morphologiques de l'Épinette blanche soumise à la sédimentation éolienne en milieu dunaire, Québec subarctique Filion, Louise Marin, Pierre 1988 http://dx.doi.org/10.1139/b88-254 http://www.nrcresearchpress.com/doi/pdf/10.1139/b88-254 fr fre Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Botany volume 66, issue 9, page 1862-1869 ISSN 0008-4026 Plant Science journal-article 1988 crcansciencepubl https://doi.org/10.1139/b88-254 2023-11-19T13:38:28Z The characteristic growth forms of white spruce (Picea glauca (Moench) Voss) were studied within a dune located north of Whapmagoostui (Subarctic Québec). Thirty-two trees (14 living and 18 dead) were excavated and their morphology and ring patterns are described. Adventitious root development at the base of buried stems and spindle-like trunks (diameter smaller at collar than at higher levels) were the most important morphological modifications in response to slow sedimentation rates (close to 5 – 6 cm/year), as long as total sedimentation did not exceed a depth of approximately 1.25 m. The decrease in radial growth with depth was most likely due to low temperatures caused by long-lasting snow lenses within the niveoeolian sediment during the growing season. Tree dieback occurred when the sedimentation rate rose to 8 cm/year. The combined weight of sand and buried snow caused severe mechanical damage to the trees (e.g. branch and stem breakage). Life expectancy of tall trees was about 50 years under such high stress conditions. The dune moves towards the north at a rate of 0.74 m/year. The mean sedimentation rate is 7.65 cm/year. These values are similar to those found in coastal dunes in Finland. The ultimate fate of these trees is death through dune displacement. Article in Journal/Newspaper Subarctic subarctique* Canadian Science Publishing (via Crossref) Blanche ENVELOPE(140.018,140.018,-66.663,-66.663) Whapmagoostui ENVELOPE(-77.750,-77.750,55.250,55.250) Canadian Journal of Botany 66 9 1862 1869 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
French |
topic |
Plant Science |
spellingShingle |
Plant Science Filion, Louise Marin, Pierre Modifications morphologiques de l'Épinette blanche soumise à la sédimentation éolienne en milieu dunaire, Québec subarctique |
topic_facet |
Plant Science |
description |
The characteristic growth forms of white spruce (Picea glauca (Moench) Voss) were studied within a dune located north of Whapmagoostui (Subarctic Québec). Thirty-two trees (14 living and 18 dead) were excavated and their morphology and ring patterns are described. Adventitious root development at the base of buried stems and spindle-like trunks (diameter smaller at collar than at higher levels) were the most important morphological modifications in response to slow sedimentation rates (close to 5 – 6 cm/year), as long as total sedimentation did not exceed a depth of approximately 1.25 m. The decrease in radial growth with depth was most likely due to low temperatures caused by long-lasting snow lenses within the niveoeolian sediment during the growing season. Tree dieback occurred when the sedimentation rate rose to 8 cm/year. The combined weight of sand and buried snow caused severe mechanical damage to the trees (e.g. branch and stem breakage). Life expectancy of tall trees was about 50 years under such high stress conditions. The dune moves towards the north at a rate of 0.74 m/year. The mean sedimentation rate is 7.65 cm/year. These values are similar to those found in coastal dunes in Finland. The ultimate fate of these trees is death through dune displacement. |
format |
Article in Journal/Newspaper |
author |
Filion, Louise Marin, Pierre |
author_facet |
Filion, Louise Marin, Pierre |
author_sort |
Filion, Louise |
title |
Modifications morphologiques de l'Épinette blanche soumise à la sédimentation éolienne en milieu dunaire, Québec subarctique |
title_short |
Modifications morphologiques de l'Épinette blanche soumise à la sédimentation éolienne en milieu dunaire, Québec subarctique |
title_full |
Modifications morphologiques de l'Épinette blanche soumise à la sédimentation éolienne en milieu dunaire, Québec subarctique |
title_fullStr |
Modifications morphologiques de l'Épinette blanche soumise à la sédimentation éolienne en milieu dunaire, Québec subarctique |
title_full_unstemmed |
Modifications morphologiques de l'Épinette blanche soumise à la sédimentation éolienne en milieu dunaire, Québec subarctique |
title_sort |
modifications morphologiques de l'épinette blanche soumise à la sédimentation éolienne en milieu dunaire, québec subarctique |
publisher |
Canadian Science Publishing |
publishDate |
1988 |
url |
http://dx.doi.org/10.1139/b88-254 http://www.nrcresearchpress.com/doi/pdf/10.1139/b88-254 |
long_lat |
ENVELOPE(140.018,140.018,-66.663,-66.663) ENVELOPE(-77.750,-77.750,55.250,55.250) |
geographic |
Blanche Whapmagoostui |
geographic_facet |
Blanche Whapmagoostui |
genre |
Subarctic subarctique* |
genre_facet |
Subarctic subarctique* |
op_source |
Canadian Journal of Botany volume 66, issue 9, page 1862-1869 ISSN 0008-4026 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/b88-254 |
container_title |
Canadian Journal of Botany |
container_volume |
66 |
container_issue |
9 |
container_start_page |
1862 |
op_container_end_page |
1869 |
_version_ |
1785575853401309184 |