How climate and vegetation influence the fire regime of the Alaskan boreal biome: the Holocene perspective, Mitigation and Adaptation Strategies for Global Change 11
Abstract. We synthesize recent results from lake-sediment studies of Holocene fire-climatevegetation interactions in Alaskan boreal ecosystems. At the millennial time scale, the most robust feature of these records is an increase in fire occurrence with the establishment of boreal forests dominated...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.420.2483 2023-05-15T18:40:28+02:00 How climate and vegetation influence the fire regime of the Alaskan boreal biome: the Holocene perspective, Mitigation and Adaptation Strategies for Global Change 11 Feng Sheng Hu Linda B. Brubaker Daniel G. Gavin Philip E. Higuera Jason A. Lynch T. Scott Rupp Willy Tinner The Pennsylvania State University CiteSeerX Archives 2006 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.420.2483 http://www.lter.uaf.edu/pdf/968_hu_brubaker_2006.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.420.2483 http://www.lter.uaf.edu/pdf/968_hu_brubaker_2006.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.lter.uaf.edu/pdf/968_hu_brubaker_2006.pdf text 2006 ftciteseerx 2016-01-08T03:58:57Z Abstract. We synthesize recent results from lake-sediment studies of Holocene fire-climatevegetation interactions in Alaskan boreal ecosystems. At the millennial time scale, the most robust feature of these records is an increase in fire occurrence with the establishment of boreal forests dominated by Picea mariana: estimated mean fire-return intervals decreased from ≥300 yrs to as low as ∼80 yrs. This fire-vegetation relationship occurred at all sites in interior Alaska with charcoal †-based fire reconstructions, regardless of the specific time of P. mariana arrival during the Holocene. The establishment of P. mariana forests was associated with a regional climatic trend toward cooler/wetter conditions. Because such climatic change should not directly enhance fire occurrence, the increase in fire frequency most likely reflects the influence of highly flammable P. mariana forests, which are more conducive to fire ignition and spread than the preceding vegetation types (tundra, and woodlands/forests dominated by Populus or Picea glauca). Increased lightning associated with altered atmospheric circulation may have also played a role in certain areas where fire frequency increased around 4000 calibrated ‡ years before present (BP) without an apparent increase in the abundance of P. mariana. When viewed together, the paleo-fire records reveal that fire histories differed Text Tundra Alaska Unknown |
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English |
description |
Abstract. We synthesize recent results from lake-sediment studies of Holocene fire-climatevegetation interactions in Alaskan boreal ecosystems. At the millennial time scale, the most robust feature of these records is an increase in fire occurrence with the establishment of boreal forests dominated by Picea mariana: estimated mean fire-return intervals decreased from ≥300 yrs to as low as ∼80 yrs. This fire-vegetation relationship occurred at all sites in interior Alaska with charcoal †-based fire reconstructions, regardless of the specific time of P. mariana arrival during the Holocene. The establishment of P. mariana forests was associated with a regional climatic trend toward cooler/wetter conditions. Because such climatic change should not directly enhance fire occurrence, the increase in fire frequency most likely reflects the influence of highly flammable P. mariana forests, which are more conducive to fire ignition and spread than the preceding vegetation types (tundra, and woodlands/forests dominated by Populus or Picea glauca). Increased lightning associated with altered atmospheric circulation may have also played a role in certain areas where fire frequency increased around 4000 calibrated ‡ years before present (BP) without an apparent increase in the abundance of P. mariana. When viewed together, the paleo-fire records reveal that fire histories differed |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Feng Sheng Hu Linda B. Brubaker Daniel G. Gavin Philip E. Higuera Jason A. Lynch T. Scott Rupp Willy Tinner |
spellingShingle |
Feng Sheng Hu Linda B. Brubaker Daniel G. Gavin Philip E. Higuera Jason A. Lynch T. Scott Rupp Willy Tinner How climate and vegetation influence the fire regime of the Alaskan boreal biome: the Holocene perspective, Mitigation and Adaptation Strategies for Global Change 11 |
author_facet |
Feng Sheng Hu Linda B. Brubaker Daniel G. Gavin Philip E. Higuera Jason A. Lynch T. Scott Rupp Willy Tinner |
author_sort |
Feng Sheng Hu |
title |
How climate and vegetation influence the fire regime of the Alaskan boreal biome: the Holocene perspective, Mitigation and Adaptation Strategies for Global Change 11 |
title_short |
How climate and vegetation influence the fire regime of the Alaskan boreal biome: the Holocene perspective, Mitigation and Adaptation Strategies for Global Change 11 |
title_full |
How climate and vegetation influence the fire regime of the Alaskan boreal biome: the Holocene perspective, Mitigation and Adaptation Strategies for Global Change 11 |
title_fullStr |
How climate and vegetation influence the fire regime of the Alaskan boreal biome: the Holocene perspective, Mitigation and Adaptation Strategies for Global Change 11 |
title_full_unstemmed |
How climate and vegetation influence the fire regime of the Alaskan boreal biome: the Holocene perspective, Mitigation and Adaptation Strategies for Global Change 11 |
title_sort |
how climate and vegetation influence the fire regime of the alaskan boreal biome: the holocene perspective, mitigation and adaptation strategies for global change 11 |
publishDate |
2006 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.420.2483 http://www.lter.uaf.edu/pdf/968_hu_brubaker_2006.pdf |
genre |
Tundra Alaska |
genre_facet |
Tundra Alaska |
op_source |
http://www.lter.uaf.edu/pdf/968_hu_brubaker_2006.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.420.2483 http://www.lter.uaf.edu/pdf/968_hu_brubaker_2006.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766229821555212288 |