(Table 2) Survivorship of transplanted seedlings of Picea glauca inside and outside three tree islands in 1994, 1995, 2009 and after 15 years
The northern boundary of boreal forest and the ranges of tree species are expected to shift northward in response to climate warming, which will result in a decrease in the albedo of areas currently covered by tundra vegetation, an increase in terrestrial carbon sequestration, and an alteration of b...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.837803 2023-05-15T13:11:57+02:00 (Table 2) Survivorship of transplanted seedlings of Picea glauca inside and outside three tree islands in 1994, 1995, 2009 and after 15 years Walker, Xanthe Henry, Gregory HR McLeod, Katherine Hofgaard, Annika Pirotta, Enrico MEDIAN LATITUDE: 69.294983 * MEDIAN LONGITUDE: -133.108953 * SOUTH-BOUND LATITUDE: 69.184560 * WEST-BOUND LONGITUDE: -133.490920 * NORTH-BOUND LATITUDE: 69.386750 * EAST-BOUND LONGITUDE: -132.812860 * MINIMUM ELEVATION: 3.0 m * MAXIMUM ELEVATION: 39.0 m 2012-11-03 text/tab-separated-values, 78 data points https://doi.pangaea.de/10.1594/PANGAEA.837803 https://doi.org/10.1594/PANGAEA.837803 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.837803 https://doi.org/10.1594/PANGAEA.837803 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Walker, Xanthe; Henry, Gregory HR; McLeod, Katherine; Hofgaard, Annika (2012): Reproduction and seedling establishment of Picea glauca across the northernmost forest-tundra region in Canada. Global Change Biology, 18(10), 3202-3211, https://doi.org/10.1111/j.1365-2486.2012.02769.x Aspect BIO Biology Description Event label International Polar Year (2007-2008) IPY Latitude of event Location Longitude of event Northwest Territories Canada Picea glauca Site Surface description Survival Tuktoyaktuk1 Tuktoyaktuk3 Tuktoyaktuk5 Dataset 2012 ftpangaea https://doi.org/10.1594/PANGAEA.837803 https://doi.org/10.1111/j.1365-2486.2012.02769.x 2023-01-20T09:04:16Z The northern boundary of boreal forest and the ranges of tree species are expected to shift northward in response to climate warming, which will result in a decrease in the albedo of areas currently covered by tundra vegetation, an increase in terrestrial carbon sequestration, and an alteration of biodiversity in the current Low Arctic. Central to the prediction of forest expansion is an increase in the reproductive capacity and establishment of individual trees. We assessed cone production, seed viability, and transplanted seedling success of Picea glauca (Moench.) Voss. (white spruce) in the early 1990s and again in the late 2000s at four forest stand sites and eight tree island sites (clonal populations beyond present treeline) in the Mackenzie Delta region of the Northwest Territories, Canada. Over the past 20 years, average temperatures in this region have increased by 0.9 °C. This area has the northernmost forest-tundra ecotone in North America and is one of the few circumpolar regions where the northern limit of conifer trees reaches the Arctic Ocean. We found that cone production and seed viability did not change between the two periods of examination and that both variables decreased northward across the forest-tundra ecotone. Nevertheless, white spruce individuals at the northern limit of the forest-tundra ecotone produced viable seeds. Furthermore, transplanted seedlings were able to survive in the northernmost sites for 15 years, but there were no signs of natural regeneration. These results indicate that if climatic conditions continue to ameliorate, reproductive output will likely increase, but seedling establishment and forest expansion within the forest-tundra of this region is unlikely to occur without the availability of suitable recruitment sites. Processes that affect the availability of recruitment sites are likely to be important elsewhere in the circumpolar ecotone, and should be incorporated into models and predictions of climate change and its effects on the northern forest-tundra ... Dataset albedo Arctic Arctic Ocean Climate change International Polar Year IPY Mackenzie Delta Northwest Territories Tundra PANGAEA - Data Publisher for Earth & Environmental Science Arctic Arctic Ocean Canada Mackenzie Delta ENVELOPE(-136.672,-136.672,68.833,68.833) Northwest Territories ENVELOPE(-133.490920,-132.812860,69.386750,69.184560) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Aspect BIO Biology Description Event label International Polar Year (2007-2008) IPY Latitude of event Location Longitude of event Northwest Territories Canada Picea glauca Site Surface description Survival Tuktoyaktuk1 Tuktoyaktuk3 Tuktoyaktuk5 |
spellingShingle |
Aspect BIO Biology Description Event label International Polar Year (2007-2008) IPY Latitude of event Location Longitude of event Northwest Territories Canada Picea glauca Site Surface description Survival Tuktoyaktuk1 Tuktoyaktuk3 Tuktoyaktuk5 Walker, Xanthe Henry, Gregory HR McLeod, Katherine Hofgaard, Annika Pirotta, Enrico (Table 2) Survivorship of transplanted seedlings of Picea glauca inside and outside three tree islands in 1994, 1995, 2009 and after 15 years |
topic_facet |
Aspect BIO Biology Description Event label International Polar Year (2007-2008) IPY Latitude of event Location Longitude of event Northwest Territories Canada Picea glauca Site Surface description Survival Tuktoyaktuk1 Tuktoyaktuk3 Tuktoyaktuk5 |
description |
The northern boundary of boreal forest and the ranges of tree species are expected to shift northward in response to climate warming, which will result in a decrease in the albedo of areas currently covered by tundra vegetation, an increase in terrestrial carbon sequestration, and an alteration of biodiversity in the current Low Arctic. Central to the prediction of forest expansion is an increase in the reproductive capacity and establishment of individual trees. We assessed cone production, seed viability, and transplanted seedling success of Picea glauca (Moench.) Voss. (white spruce) in the early 1990s and again in the late 2000s at four forest stand sites and eight tree island sites (clonal populations beyond present treeline) in the Mackenzie Delta region of the Northwest Territories, Canada. Over the past 20 years, average temperatures in this region have increased by 0.9 °C. This area has the northernmost forest-tundra ecotone in North America and is one of the few circumpolar regions where the northern limit of conifer trees reaches the Arctic Ocean. We found that cone production and seed viability did not change between the two periods of examination and that both variables decreased northward across the forest-tundra ecotone. Nevertheless, white spruce individuals at the northern limit of the forest-tundra ecotone produced viable seeds. Furthermore, transplanted seedlings were able to survive in the northernmost sites for 15 years, but there were no signs of natural regeneration. These results indicate that if climatic conditions continue to ameliorate, reproductive output will likely increase, but seedling establishment and forest expansion within the forest-tundra of this region is unlikely to occur without the availability of suitable recruitment sites. Processes that affect the availability of recruitment sites are likely to be important elsewhere in the circumpolar ecotone, and should be incorporated into models and predictions of climate change and its effects on the northern forest-tundra ... |
format |
Dataset |
author |
Walker, Xanthe Henry, Gregory HR McLeod, Katherine Hofgaard, Annika Pirotta, Enrico |
author_facet |
Walker, Xanthe Henry, Gregory HR McLeod, Katherine Hofgaard, Annika Pirotta, Enrico |
author_sort |
Walker, Xanthe |
title |
(Table 2) Survivorship of transplanted seedlings of Picea glauca inside and outside three tree islands in 1994, 1995, 2009 and after 15 years |
title_short |
(Table 2) Survivorship of transplanted seedlings of Picea glauca inside and outside three tree islands in 1994, 1995, 2009 and after 15 years |
title_full |
(Table 2) Survivorship of transplanted seedlings of Picea glauca inside and outside three tree islands in 1994, 1995, 2009 and after 15 years |
title_fullStr |
(Table 2) Survivorship of transplanted seedlings of Picea glauca inside and outside three tree islands in 1994, 1995, 2009 and after 15 years |
title_full_unstemmed |
(Table 2) Survivorship of transplanted seedlings of Picea glauca inside and outside three tree islands in 1994, 1995, 2009 and after 15 years |
title_sort |
(table 2) survivorship of transplanted seedlings of picea glauca inside and outside three tree islands in 1994, 1995, 2009 and after 15 years |
publisher |
PANGAEA |
publishDate |
2012 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.837803 https://doi.org/10.1594/PANGAEA.837803 |
op_coverage |
MEDIAN LATITUDE: 69.294983 * MEDIAN LONGITUDE: -133.108953 * SOUTH-BOUND LATITUDE: 69.184560 * WEST-BOUND LONGITUDE: -133.490920 * NORTH-BOUND LATITUDE: 69.386750 * EAST-BOUND LONGITUDE: -132.812860 * MINIMUM ELEVATION: 3.0 m * MAXIMUM ELEVATION: 39.0 m |
long_lat |
ENVELOPE(-136.672,-136.672,68.833,68.833) ENVELOPE(-133.490920,-132.812860,69.386750,69.184560) |
geographic |
Arctic Arctic Ocean Canada Mackenzie Delta Northwest Territories |
geographic_facet |
Arctic Arctic Ocean Canada Mackenzie Delta Northwest Territories |
genre |
albedo Arctic Arctic Ocean Climate change International Polar Year IPY Mackenzie Delta Northwest Territories Tundra |
genre_facet |
albedo Arctic Arctic Ocean Climate change International Polar Year IPY Mackenzie Delta Northwest Territories Tundra |
op_source |
Supplement to: Walker, Xanthe; Henry, Gregory HR; McLeod, Katherine; Hofgaard, Annika (2012): Reproduction and seedling establishment of Picea glauca across the northernmost forest-tundra region in Canada. Global Change Biology, 18(10), 3202-3211, https://doi.org/10.1111/j.1365-2486.2012.02769.x |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.837803 https://doi.org/10.1594/PANGAEA.837803 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.837803 https://doi.org/10.1111/j.1365-2486.2012.02769.x |
_version_ |
1766249669430607872 |