Evidence and Implications of Frequent Fires in Ancient Shrub Tundra
Understanding feedbacks between terrestrial and atmospheric systems is vital for predicting the consequences of global change, particularly in the rapidly changing Arctic. Fire is a key process in this context, but the consequences of altered fire regimes in tundra ecosystems are rarely considered,...
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Lawrence Livermore National Laboratory
2008
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ftunivnotexas:info:ark/67531/metadc902031 2023-05-15T14:57:43+02:00 Evidence and Implications of Frequent Fires in Ancient Shrub Tundra Higuera, P E Brubaker, L B Anderson, P M Brown, T A Kennedy, A T Hu, F S United States. Department of Energy. 2008-03-06 PDF-file: 25 pages; size: 1 Mbytes Text http://digital.library.unt.edu/ark:/67531/metadc902031/ English eng Lawrence Livermore National Laboratory rep-no: LLNL-JRNL-402058 grantno: W-7405-ENG-48 osti: 945153 http://digital.library.unt.edu/ark:/67531/metadc902031/ ark: ark:/67531/metadc902031 Journal Name: PLoS ONE, vol. 3, no. 3, March 5, 2008, e0001744. doi:10.1371; Journal Volume: 3; Journal Issue: 3 Charcoal Plants Forests Abundance Sediments Pollen Lakes 58 Geosciences Ecosystems Shrubs 54 Environmental Sciences Moisture Carbon Tundra Article 2008 ftunivnotexas 2016-12-10T23:07:31Z Understanding feedbacks between terrestrial and atmospheric systems is vital for predicting the consequences of global change, particularly in the rapidly changing Arctic. Fire is a key process in this context, but the consequences of altered fire regimes in tundra ecosystems are rarely considered, largely because tundra fires occur infrequently on the modern landscape. We present paleoecological data that indicate frequent tundra fires in northcentral Alaska between 14,000 and 10,000 years ago. Charcoal and pollen from lake sediments reveal that ancient birchdominated shrub tundra burned as often as modern boreal forests in the region, every 144 years on average (+/- 90 s.d.; n = 44). Although paleoclimate interpretations and data from modern tundra fires suggest that increased burning was aided by low effective moisture, vegetation cover clearly played a critical role in facilitating the paleo-fires by creating an abundance of fine fuels. These records suggest that greater fire activity will likely accompany temperature-related increases in shrub-dominated tundra predicted for the 21st century and beyond. Increased tundra burning will have broad impacts on physical and biological systems as well as land-atmosphere interactions in the Arctic, including the potential to release stored organic carbon to the atmosphere. Article in Journal/Newspaper Arctic Tundra Alaska University of North Texas: UNT Digital Library Arctic |
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Open Polar |
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University of North Texas: UNT Digital Library |
op_collection_id |
ftunivnotexas |
language |
English |
topic |
Charcoal Plants Forests Abundance Sediments Pollen Lakes 58 Geosciences Ecosystems Shrubs 54 Environmental Sciences Moisture Carbon Tundra |
spellingShingle |
Charcoal Plants Forests Abundance Sediments Pollen Lakes 58 Geosciences Ecosystems Shrubs 54 Environmental Sciences Moisture Carbon Tundra Higuera, P E Brubaker, L B Anderson, P M Brown, T A Kennedy, A T Hu, F S Evidence and Implications of Frequent Fires in Ancient Shrub Tundra |
topic_facet |
Charcoal Plants Forests Abundance Sediments Pollen Lakes 58 Geosciences Ecosystems Shrubs 54 Environmental Sciences Moisture Carbon Tundra |
description |
Understanding feedbacks between terrestrial and atmospheric systems is vital for predicting the consequences of global change, particularly in the rapidly changing Arctic. Fire is a key process in this context, but the consequences of altered fire regimes in tundra ecosystems are rarely considered, largely because tundra fires occur infrequently on the modern landscape. We present paleoecological data that indicate frequent tundra fires in northcentral Alaska between 14,000 and 10,000 years ago. Charcoal and pollen from lake sediments reveal that ancient birchdominated shrub tundra burned as often as modern boreal forests in the region, every 144 years on average (+/- 90 s.d.; n = 44). Although paleoclimate interpretations and data from modern tundra fires suggest that increased burning was aided by low effective moisture, vegetation cover clearly played a critical role in facilitating the paleo-fires by creating an abundance of fine fuels. These records suggest that greater fire activity will likely accompany temperature-related increases in shrub-dominated tundra predicted for the 21st century and beyond. Increased tundra burning will have broad impacts on physical and biological systems as well as land-atmosphere interactions in the Arctic, including the potential to release stored organic carbon to the atmosphere. |
author2 |
United States. Department of Energy. |
format |
Article in Journal/Newspaper |
author |
Higuera, P E Brubaker, L B Anderson, P M Brown, T A Kennedy, A T Hu, F S |
author_facet |
Higuera, P E Brubaker, L B Anderson, P M Brown, T A Kennedy, A T Hu, F S |
author_sort |
Higuera, P E |
title |
Evidence and Implications of Frequent Fires in Ancient Shrub Tundra |
title_short |
Evidence and Implications of Frequent Fires in Ancient Shrub Tundra |
title_full |
Evidence and Implications of Frequent Fires in Ancient Shrub Tundra |
title_fullStr |
Evidence and Implications of Frequent Fires in Ancient Shrub Tundra |
title_full_unstemmed |
Evidence and Implications of Frequent Fires in Ancient Shrub Tundra |
title_sort |
evidence and implications of frequent fires in ancient shrub tundra |
publisher |
Lawrence Livermore National Laboratory |
publishDate |
2008 |
url |
http://digital.library.unt.edu/ark:/67531/metadc902031/ |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Tundra Alaska |
genre_facet |
Arctic Tundra Alaska |
op_source |
Journal Name: PLoS ONE, vol. 3, no. 3, March 5, 2008, e0001744. doi:10.1371; Journal Volume: 3; Journal Issue: 3 |
op_relation |
rep-no: LLNL-JRNL-402058 grantno: W-7405-ENG-48 osti: 945153 http://digital.library.unt.edu/ark:/67531/metadc902031/ ark: ark:/67531/metadc902031 |
_version_ |
1766329838088486912 |