Topographic influences on ring widths of trees and shrubs across alpine treelines in southwest Yukon
Growth responses of trees and shrubs to climate often exhibit unexplained variation in alpine regions, making it difficult to predict how they will respond to future changes in climate. We sought to characterize and explain this variability in southwest Yukon, a topographically complex region of sub...
Published in: | Arctic, Antarctic, and Alpine Research |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Taylor & Francis Group
2018
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Online Access: | https://doi.org/10.1080/15230430.2018.1495445 https://doaj.org/article/0874a559e725457ba30c4a96445e63ae |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:0874a559e725457ba30c4a96445e63ae 2023-05-15T14:14:18+02:00 Topographic influences on ring widths of trees and shrubs across alpine treelines in southwest Yukon Katherine D. Dearborn Ryan K. Danby 2018-01-01 https://doi.org/10.1080/15230430.2018.1495445 https://doaj.org/article/0874a559e725457ba30c4a96445e63ae en eng Taylor & Francis Group 1523-0430 1938-4246 doi:10.1080/15230430.2018.1495445 https://doaj.org/article/0874a559e725457ba30c4a96445e63ae undefined Arctic, Antarctic, and Alpine Research, Vol 50, Iss 1 (2018) dendroclimatology shrub ring width analysis forest-tundra ecotone envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2018 fttriple https://doi.org/10.1080/15230430.2018.1495445 2023-01-22T19:11:29Z Growth responses of trees and shrubs to climate often exhibit unexplained variation in alpine regions, making it difficult to predict how they will respond to future changes in climate. We sought to characterize and explain this variability in southwest Yukon, a topographically complex region of subarctic Canada. We collected cores and sections from 360 spruce trees and 480 willow shrubs across treelines on north and south aspects in six valleys spanning two mountain ranges. We compared growth rates, growth patterns, and climate-growth responses between species and topographic factors. South aspects had wider tree rings and higher tree and shrub interseries correlations than north aspects, likely because of shallow active layers on the latter. Growth patterns and responses to climate did not vary between aspects or elevations but differed slightly between mountain ranges, likely because of differences in spring soil moisture content between ranges. Growth responses of both species to summer temperature were positive, but tree growth was negatively correlated to spring temperature and shrub growth was negatively correlated to summer precipitation, both of which are projected to increase along with summer temperature. Future changes in climate could therefore reduce the growth of one or both species in southwest Yukon. Article in Journal/Newspaper Antarctic and Alpine Research Arctic Subarctic Tundra Yukon Unknown Canada Yukon Arctic, Antarctic, and Alpine Research 50 1 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
dendroclimatology shrub ring width analysis forest-tundra ecotone envir geo |
spellingShingle |
dendroclimatology shrub ring width analysis forest-tundra ecotone envir geo Katherine D. Dearborn Ryan K. Danby Topographic influences on ring widths of trees and shrubs across alpine treelines in southwest Yukon |
topic_facet |
dendroclimatology shrub ring width analysis forest-tundra ecotone envir geo |
description |
Growth responses of trees and shrubs to climate often exhibit unexplained variation in alpine regions, making it difficult to predict how they will respond to future changes in climate. We sought to characterize and explain this variability in southwest Yukon, a topographically complex region of subarctic Canada. We collected cores and sections from 360 spruce trees and 480 willow shrubs across treelines on north and south aspects in six valleys spanning two mountain ranges. We compared growth rates, growth patterns, and climate-growth responses between species and topographic factors. South aspects had wider tree rings and higher tree and shrub interseries correlations than north aspects, likely because of shallow active layers on the latter. Growth patterns and responses to climate did not vary between aspects or elevations but differed slightly between mountain ranges, likely because of differences in spring soil moisture content between ranges. Growth responses of both species to summer temperature were positive, but tree growth was negatively correlated to spring temperature and shrub growth was negatively correlated to summer precipitation, both of which are projected to increase along with summer temperature. Future changes in climate could therefore reduce the growth of one or both species in southwest Yukon. |
format |
Article in Journal/Newspaper |
author |
Katherine D. Dearborn Ryan K. Danby |
author_facet |
Katherine D. Dearborn Ryan K. Danby |
author_sort |
Katherine D. Dearborn |
title |
Topographic influences on ring widths of trees and shrubs across alpine treelines in southwest Yukon |
title_short |
Topographic influences on ring widths of trees and shrubs across alpine treelines in southwest Yukon |
title_full |
Topographic influences on ring widths of trees and shrubs across alpine treelines in southwest Yukon |
title_fullStr |
Topographic influences on ring widths of trees and shrubs across alpine treelines in southwest Yukon |
title_full_unstemmed |
Topographic influences on ring widths of trees and shrubs across alpine treelines in southwest Yukon |
title_sort |
topographic influences on ring widths of trees and shrubs across alpine treelines in southwest yukon |
publisher |
Taylor & Francis Group |
publishDate |
2018 |
url |
https://doi.org/10.1080/15230430.2018.1495445 https://doaj.org/article/0874a559e725457ba30c4a96445e63ae |
geographic |
Canada Yukon |
geographic_facet |
Canada Yukon |
genre |
Antarctic and Alpine Research Arctic Subarctic Tundra Yukon |
genre_facet |
Antarctic and Alpine Research Arctic Subarctic Tundra Yukon |
op_source |
Arctic, Antarctic, and Alpine Research, Vol 50, Iss 1 (2018) |
op_relation |
1523-0430 1938-4246 doi:10.1080/15230430.2018.1495445 https://doaj.org/article/0874a559e725457ba30c4a96445e63ae |
op_rights |
undefined |
op_doi |
https://doi.org/10.1080/15230430.2018.1495445 |
container_title |
Arctic, Antarctic, and Alpine Research |
container_volume |
50 |
container_issue |
1 |
_version_ |
1766286842948222976 |