Data from: Black spruce (Picea mariana) colonization of subarctic snowpatches in response to warmer climate
1. Snowpatches are disjunct arctic ecosystems scattered across the Subarctic, particularly on wind-protected lee slopes, where a thick snow cover accumulates during the winter. These snow-rich treeless ecosystems are affected by delayed snowmelt, causing shorter growing seasons. Snow-tolerant plants...
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ftzenodo:oai:zenodo.org:4970121 2024-09-15T18:04:07+00:00 Data from: Black spruce (Picea mariana) colonization of subarctic snowpatches in response to warmer climate Truchon-Savard, Alexandre Jean, Melanie Payette, Serge 2018-12-27 https://doi.org/10.5061/dryad.sf1k4m8 unknown Zenodo https://doi.org/10.1111/1365-2745.13123 https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.sf1k4m8 oai:zenodo.org:4970121 info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode forest-tundra plant-climate interactions 1950-2010 Holocene treeline tree-ring Subarctic Betula glandulosa Picea mariana snowpatch info:eu-repo/semantics/other 2018 ftzenodo https://doi.org/10.5061/dryad.sf1k4m810.1111/1365-2745.13123 2024-07-26T13:43:36Z 1. Snowpatches are disjunct arctic ecosystems scattered across the Subarctic, particularly on wind-protected lee slopes, where a thick snow cover accumulates during the winter. These snow-rich treeless ecosystems are affected by delayed snowmelt, causing shorter growing seasons. Snow-tolerant plants occupy the center of subarctic snowpatches whereas black spruce trees grow at the margins. Snowpatches have shown sporadic expansion and shrinkage phases from tree establishment and mortality linked to climatic trends. Field surveys in the Subarctic of eastern Canada are showing an afforestation process occurring in snowpatches. The origin and nature of this afforestation were investigated based on the hypothesis that tree colonization and growth were closely associated with recent changes in climate. 2. Snowpatches were categorized in three types based on border trees: forested, semi-forested and tundra-like. In eight randomly selected snowpatches of each type, snowpatch borders and areas covered by deciduous shrubs or trees were mapped and chionophilous plants and frost-associated soil disturbances were recorded. Radial (tree-ring ) and vertical growth were measured on stems to evaluate the impact of climate and local factors on snowpatch black spruce populations. 3. Two waves of spruce colonization occurred in all forested and semi-forested snowpatches in the 1960s and in the 1980s to present. Spruce establishment was more frequent and abundant in recent years, near the forest margins and on moss and barren seedbeds. Expanding shrub (dwarf birch) cover inhibited spruce seedling establishment. Tree establishment and growth were positively correlated with growing season temperature and negatively correlated with annual maximum snow depth. More recently established spruce seedlings exhibited faster vertical growth than those established in the 20thcentury. 4. Synthesis: Due to warmer conditions and earlier snowmelt in eastern Canada, black spruce trees and dwarf birch shrubs are racing through subarctic snowpatches. ... Other/Unknown Material Dwarf birch Subarctic Tundra Zenodo |
institution |
Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
forest-tundra plant-climate interactions 1950-2010 Holocene treeline tree-ring Subarctic Betula glandulosa Picea mariana snowpatch |
spellingShingle |
forest-tundra plant-climate interactions 1950-2010 Holocene treeline tree-ring Subarctic Betula glandulosa Picea mariana snowpatch Truchon-Savard, Alexandre Jean, Melanie Payette, Serge Data from: Black spruce (Picea mariana) colonization of subarctic snowpatches in response to warmer climate |
topic_facet |
forest-tundra plant-climate interactions 1950-2010 Holocene treeline tree-ring Subarctic Betula glandulosa Picea mariana snowpatch |
description |
1. Snowpatches are disjunct arctic ecosystems scattered across the Subarctic, particularly on wind-protected lee slopes, where a thick snow cover accumulates during the winter. These snow-rich treeless ecosystems are affected by delayed snowmelt, causing shorter growing seasons. Snow-tolerant plants occupy the center of subarctic snowpatches whereas black spruce trees grow at the margins. Snowpatches have shown sporadic expansion and shrinkage phases from tree establishment and mortality linked to climatic trends. Field surveys in the Subarctic of eastern Canada are showing an afforestation process occurring in snowpatches. The origin and nature of this afforestation were investigated based on the hypothesis that tree colonization and growth were closely associated with recent changes in climate. 2. Snowpatches were categorized in three types based on border trees: forested, semi-forested and tundra-like. In eight randomly selected snowpatches of each type, snowpatch borders and areas covered by deciduous shrubs or trees were mapped and chionophilous plants and frost-associated soil disturbances were recorded. Radial (tree-ring ) and vertical growth were measured on stems to evaluate the impact of climate and local factors on snowpatch black spruce populations. 3. Two waves of spruce colonization occurred in all forested and semi-forested snowpatches in the 1960s and in the 1980s to present. Spruce establishment was more frequent and abundant in recent years, near the forest margins and on moss and barren seedbeds. Expanding shrub (dwarf birch) cover inhibited spruce seedling establishment. Tree establishment and growth were positively correlated with growing season temperature and negatively correlated with annual maximum snow depth. More recently established spruce seedlings exhibited faster vertical growth than those established in the 20thcentury. 4. Synthesis: Due to warmer conditions and earlier snowmelt in eastern Canada, black spruce trees and dwarf birch shrubs are racing through subarctic snowpatches. ... |
format |
Other/Unknown Material |
author |
Truchon-Savard, Alexandre Jean, Melanie Payette, Serge |
author_facet |
Truchon-Savard, Alexandre Jean, Melanie Payette, Serge |
author_sort |
Truchon-Savard, Alexandre |
title |
Data from: Black spruce (Picea mariana) colonization of subarctic snowpatches in response to warmer climate |
title_short |
Data from: Black spruce (Picea mariana) colonization of subarctic snowpatches in response to warmer climate |
title_full |
Data from: Black spruce (Picea mariana) colonization of subarctic snowpatches in response to warmer climate |
title_fullStr |
Data from: Black spruce (Picea mariana) colonization of subarctic snowpatches in response to warmer climate |
title_full_unstemmed |
Data from: Black spruce (Picea mariana) colonization of subarctic snowpatches in response to warmer climate |
title_sort |
data from: black spruce (picea mariana) colonization of subarctic snowpatches in response to warmer climate |
publisher |
Zenodo |
publishDate |
2018 |
url |
https://doi.org/10.5061/dryad.sf1k4m8 |
genre |
Dwarf birch Subarctic Tundra |
genre_facet |
Dwarf birch Subarctic Tundra |
op_relation |
https://doi.org/10.1111/1365-2745.13123 https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.sf1k4m8 oai:zenodo.org:4970121 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5061/dryad.sf1k4m810.1111/1365-2745.13123 |
_version_ |
1810441605000200192 |