Subarctic and alpine tree line dynamics during the last 400 years in north‐western and central Canada
Abstract Aim The objectives of this study were to: (1) identify episodes of establishment and mortality of young and mature trees at several sites at the alpine tree line in the western Northwest Territories and the latitudinal tree line in northern Manitoba; (2) infer changes in the structure and l...
Published in: | Journal of Biogeography |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2011
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1111/j.1365-2699.2011.02642.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2699.2011.02642.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2699.2011.02642.x |
id |
crwiley:10.1111/j.1365-2699.2011.02642.x |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1111/j.1365-2699.2011.02642.x 2024-06-02T08:05:22+00:00 Subarctic and alpine tree line dynamics during the last 400 years in north‐western and central Canada Mamet, Steven D. Kershaw, G. Peter 2011 http://dx.doi.org/10.1111/j.1365-2699.2011.02642.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2699.2011.02642.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2699.2011.02642.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Biogeography volume 39, issue 5, page 855-868 ISSN 0305-0270 1365-2699 journal-article 2011 crwiley https://doi.org/10.1111/j.1365-2699.2011.02642.x 2024-05-03T11:15:42Z Abstract Aim The objectives of this study were to: (1) identify episodes of establishment and mortality of young and mature trees at several sites at the alpine tree line in the western Northwest Territories and the latitudinal tree line in northern Manitoba; (2) infer changes in the structure and location of the tree line from patterns of establishment; (3) evaluate any relationship between these changes and climate; and (4) investigate sources of variability between sampling sites and study areas. Location Taiga Cordillera of the western Mackenzie Mountains in the Northwest Territories, and the western Hudson Bay Lowlands in northern Manitoba, Canada. Methods Recent tree line dynamics were examined at six climatically similar sites: three in the western Mackenzie Mountains and three around Churchill, Manitoba. Dendroecological techniques were employed to construct static age distributions of species present at each site. Static age structures, residuals from modelled age distributions, and reconstructions of dynamic stand density were used to identify patterns of establishment and mortality and to compare these to changes in climate. Results Tree line locations advanced and stand density increased during the early‐to‐mid‐20th century around Churchill, although responses were not uniform across sites or species. Results were less conclusive in the Mackenzie Mountains, although the tree line probably advanced during the late 18th century, and stand infilling occurred during the mid‐20th century. Correlation analyses with temperature suggest that conditions during establishment and particularly during recruitment are crucial for controlling tree line dynamics. Main conclusions Tree line advance and stand infilling have continued to the present at Churchill, while the tree line has stagnated in the western Mackenzie Mountains. The results of this study indicate that site‐ and species‐specific responses play a large role in determining the tree line response at multiple scales, illustrating the complexity of tree ... Article in Journal/Newspaper Churchill Hudson Bay Mackenzie mountains Northwest Territories Subarctic Taiga cordillera taiga Wiley Online Library Canada Hudson Hudson Bay Northwest Territories Journal of Biogeography 39 5 855 868 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract Aim The objectives of this study were to: (1) identify episodes of establishment and mortality of young and mature trees at several sites at the alpine tree line in the western Northwest Territories and the latitudinal tree line in northern Manitoba; (2) infer changes in the structure and location of the tree line from patterns of establishment; (3) evaluate any relationship between these changes and climate; and (4) investigate sources of variability between sampling sites and study areas. Location Taiga Cordillera of the western Mackenzie Mountains in the Northwest Territories, and the western Hudson Bay Lowlands in northern Manitoba, Canada. Methods Recent tree line dynamics were examined at six climatically similar sites: three in the western Mackenzie Mountains and three around Churchill, Manitoba. Dendroecological techniques were employed to construct static age distributions of species present at each site. Static age structures, residuals from modelled age distributions, and reconstructions of dynamic stand density were used to identify patterns of establishment and mortality and to compare these to changes in climate. Results Tree line locations advanced and stand density increased during the early‐to‐mid‐20th century around Churchill, although responses were not uniform across sites or species. Results were less conclusive in the Mackenzie Mountains, although the tree line probably advanced during the late 18th century, and stand infilling occurred during the mid‐20th century. Correlation analyses with temperature suggest that conditions during establishment and particularly during recruitment are crucial for controlling tree line dynamics. Main conclusions Tree line advance and stand infilling have continued to the present at Churchill, while the tree line has stagnated in the western Mackenzie Mountains. The results of this study indicate that site‐ and species‐specific responses play a large role in determining the tree line response at multiple scales, illustrating the complexity of tree ... |
format |
Article in Journal/Newspaper |
author |
Mamet, Steven D. Kershaw, G. Peter |
spellingShingle |
Mamet, Steven D. Kershaw, G. Peter Subarctic and alpine tree line dynamics during the last 400 years in north‐western and central Canada |
author_facet |
Mamet, Steven D. Kershaw, G. Peter |
author_sort |
Mamet, Steven D. |
title |
Subarctic and alpine tree line dynamics during the last 400 years in north‐western and central Canada |
title_short |
Subarctic and alpine tree line dynamics during the last 400 years in north‐western and central Canada |
title_full |
Subarctic and alpine tree line dynamics during the last 400 years in north‐western and central Canada |
title_fullStr |
Subarctic and alpine tree line dynamics during the last 400 years in north‐western and central Canada |
title_full_unstemmed |
Subarctic and alpine tree line dynamics during the last 400 years in north‐western and central Canada |
title_sort |
subarctic and alpine tree line dynamics during the last 400 years in north‐western and central canada |
publisher |
Wiley |
publishDate |
2011 |
url |
http://dx.doi.org/10.1111/j.1365-2699.2011.02642.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2699.2011.02642.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2699.2011.02642.x |
geographic |
Canada Hudson Hudson Bay Northwest Territories |
geographic_facet |
Canada Hudson Hudson Bay Northwest Territories |
genre |
Churchill Hudson Bay Mackenzie mountains Northwest Territories Subarctic Taiga cordillera taiga |
genre_facet |
Churchill Hudson Bay Mackenzie mountains Northwest Territories Subarctic Taiga cordillera taiga |
op_source |
Journal of Biogeography volume 39, issue 5, page 855-868 ISSN 0305-0270 1365-2699 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-2699.2011.02642.x |
container_title |
Journal of Biogeography |
container_volume |
39 |
container_issue |
5 |
container_start_page |
855 |
op_container_end_page |
868 |
_version_ |
1800750159509848064 |