Modern pollen assemblages near the arctic tree line, Mackenzie Delta region, Northwest Territories
Samples of surficial lake sediment and of moss polsters from 39 sites in the forest-tundra transitional area immediately east of the Mackenzie Delta, Northwest Territories, were investigated palynologically. Lake sediment samples within the forest and tundra regional vegetation zones are constant in...
Published in: | Canadian Journal of Botany |
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Language: | English |
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Canadian Science Publishing
1974
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Online Access: | http://dx.doi.org/10.1139/b74-050 http://www.nrcresearchpress.com/doi/pdf/10.1139/b74-050 |
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crcansciencepubl:10.1139/b74-050 2023-12-17T10:25:55+01:00 Modern pollen assemblages near the arctic tree line, Mackenzie Delta region, Northwest Territories Ritchie, J. C. 1974 http://dx.doi.org/10.1139/b74-050 http://www.nrcresearchpress.com/doi/pdf/10.1139/b74-050 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Botany volume 52, issue 2, page 381-396 ISSN 0008-4026 Plant Science journal-article 1974 crcansciencepubl https://doi.org/10.1139/b74-050 2023-11-19T13:38:41Z Samples of surficial lake sediment and of moss polsters from 39 sites in the forest-tundra transitional area immediately east of the Mackenzie Delta, Northwest Territories, were investigated palynologically. Lake sediment samples within the forest and tundra regional vegetation zones are constant in pollen frequencies, but forest–tundra sites are very variable. Forest site spectra are composed of just over 50% arboreal types (spruce, 25–30%; birch, 30%), with 30–40% alder pollen. Tundra spectra have 60–70% non-arboreal types, and 10–15% each of alder and spruce. Forest–tundra values are variable, generally lying between the forest and tundra proportions. Polster samples show as much variability within as between regions, because of local effects. Polster samples indicate local community composition with the regional pollen rain variably masked by the local elements. Article in Journal/Newspaper Arctic Mackenzie Delta Northwest Territories Tundra Canadian Science Publishing (via Crossref) Arctic Northwest Territories Mackenzie Delta ENVELOPE(-136.672,-136.672,68.833,68.833) Canadian Journal of Botany 52 2 381 396 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Plant Science |
spellingShingle |
Plant Science Ritchie, J. C. Modern pollen assemblages near the arctic tree line, Mackenzie Delta region, Northwest Territories |
topic_facet |
Plant Science |
description |
Samples of surficial lake sediment and of moss polsters from 39 sites in the forest-tundra transitional area immediately east of the Mackenzie Delta, Northwest Territories, were investigated palynologically. Lake sediment samples within the forest and tundra regional vegetation zones are constant in pollen frequencies, but forest–tundra sites are very variable. Forest site spectra are composed of just over 50% arboreal types (spruce, 25–30%; birch, 30%), with 30–40% alder pollen. Tundra spectra have 60–70% non-arboreal types, and 10–15% each of alder and spruce. Forest–tundra values are variable, generally lying between the forest and tundra proportions. Polster samples show as much variability within as between regions, because of local effects. Polster samples indicate local community composition with the regional pollen rain variably masked by the local elements. |
format |
Article in Journal/Newspaper |
author |
Ritchie, J. C. |
author_facet |
Ritchie, J. C. |
author_sort |
Ritchie, J. C. |
title |
Modern pollen assemblages near the arctic tree line, Mackenzie Delta region, Northwest Territories |
title_short |
Modern pollen assemblages near the arctic tree line, Mackenzie Delta region, Northwest Territories |
title_full |
Modern pollen assemblages near the arctic tree line, Mackenzie Delta region, Northwest Territories |
title_fullStr |
Modern pollen assemblages near the arctic tree line, Mackenzie Delta region, Northwest Territories |
title_full_unstemmed |
Modern pollen assemblages near the arctic tree line, Mackenzie Delta region, Northwest Territories |
title_sort |
modern pollen assemblages near the arctic tree line, mackenzie delta region, northwest territories |
publisher |
Canadian Science Publishing |
publishDate |
1974 |
url |
http://dx.doi.org/10.1139/b74-050 http://www.nrcresearchpress.com/doi/pdf/10.1139/b74-050 |
long_lat |
ENVELOPE(-136.672,-136.672,68.833,68.833) |
geographic |
Arctic Northwest Territories Mackenzie Delta |
geographic_facet |
Arctic Northwest Territories Mackenzie Delta |
genre |
Arctic Mackenzie Delta Northwest Territories Tundra |
genre_facet |
Arctic Mackenzie Delta Northwest Territories Tundra |
op_source |
Canadian Journal of Botany volume 52, issue 2, page 381-396 ISSN 0008-4026 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/b74-050 |
container_title |
Canadian Journal of Botany |
container_volume |
52 |
container_issue |
2 |
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381 |
op_container_end_page |
396 |
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1785577582576533504 |