Effects of permafrost degradation on woody vegetation at arctic treeline on the Seward Peninsula, Alaska
Abstract Permafrost degradation leads to substantial changes in soil thermal and hydrologic characteristics. We investigated the effects of changes in active layer thickness and soil drainage on vegetation distribution near the arctic treeline on the Seward Peninsula, Alaska. We measured active laye...
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crwiley:10.1002/ppp.446 2024-06-23T07:44:55+00:00 Effects of permafrost degradation on woody vegetation at arctic treeline on the Seward Peninsula, Alaska Lloyd, Andrea H. Yoshikawa, Kenji Fastie, Christopher L. Hinzman, Larry Fraver, Matthew 2003 http://dx.doi.org/10.1002/ppp.446 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.446 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.446 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Permafrost and Periglacial Processes volume 14, issue 2, page 93-101 ISSN 1045-6740 1099-1530 journal-article 2003 crwiley https://doi.org/10.1002/ppp.446 2024-06-11T04:45:19Z Abstract Permafrost degradation leads to substantial changes in soil thermal and hydrologic characteristics. We investigated the effects of changes in active layer thickness and soil drainage on vegetation distribution near the arctic treeline on the Seward Peninsula, Alaska. We measured active layer thickness, soil moisture, density of tall shrub species, cover of low shrub species, and reconstructed white spruce establishment history along transects across the banks of a network of thaw ponds. We found that active layer thickness did not vary along our transects, but soils on thaw pond banks were significantly drier than those on level tundra or in thaw‐pond channels. Thaw‐pond banks were the only sites in which trees successfully established, and shrub communities on thaw‐pond banks were taller and more dominated by tall shrub species like willow and shrub birch. The data suggest that the establishment of tree and tall shrub species at the arctic treeline can be limited by the availability of well‐drained microsites, and the response of these species to regional climatic changes will be constrained by the availability of such microsites and thus contingent upon further degradation of the permafrost. Copyright © 2003 John Wiley & Sons, Ltd. Article in Journal/Newspaper Active layer thickness Arctic permafrost Permafrost and Periglacial Processes Seward Peninsula Tundra Alaska Wiley Online Library Arctic Permafrost and Periglacial Processes 14 2 93 101 |
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Wiley Online Library |
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English |
description |
Abstract Permafrost degradation leads to substantial changes in soil thermal and hydrologic characteristics. We investigated the effects of changes in active layer thickness and soil drainage on vegetation distribution near the arctic treeline on the Seward Peninsula, Alaska. We measured active layer thickness, soil moisture, density of tall shrub species, cover of low shrub species, and reconstructed white spruce establishment history along transects across the banks of a network of thaw ponds. We found that active layer thickness did not vary along our transects, but soils on thaw pond banks were significantly drier than those on level tundra or in thaw‐pond channels. Thaw‐pond banks were the only sites in which trees successfully established, and shrub communities on thaw‐pond banks were taller and more dominated by tall shrub species like willow and shrub birch. The data suggest that the establishment of tree and tall shrub species at the arctic treeline can be limited by the availability of well‐drained microsites, and the response of these species to regional climatic changes will be constrained by the availability of such microsites and thus contingent upon further degradation of the permafrost. Copyright © 2003 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Lloyd, Andrea H. Yoshikawa, Kenji Fastie, Christopher L. Hinzman, Larry Fraver, Matthew |
spellingShingle |
Lloyd, Andrea H. Yoshikawa, Kenji Fastie, Christopher L. Hinzman, Larry Fraver, Matthew Effects of permafrost degradation on woody vegetation at arctic treeline on the Seward Peninsula, Alaska |
author_facet |
Lloyd, Andrea H. Yoshikawa, Kenji Fastie, Christopher L. Hinzman, Larry Fraver, Matthew |
author_sort |
Lloyd, Andrea H. |
title |
Effects of permafrost degradation on woody vegetation at arctic treeline on the Seward Peninsula, Alaska |
title_short |
Effects of permafrost degradation on woody vegetation at arctic treeline on the Seward Peninsula, Alaska |
title_full |
Effects of permafrost degradation on woody vegetation at arctic treeline on the Seward Peninsula, Alaska |
title_fullStr |
Effects of permafrost degradation on woody vegetation at arctic treeline on the Seward Peninsula, Alaska |
title_full_unstemmed |
Effects of permafrost degradation on woody vegetation at arctic treeline on the Seward Peninsula, Alaska |
title_sort |
effects of permafrost degradation on woody vegetation at arctic treeline on the seward peninsula, alaska |
publisher |
Wiley |
publishDate |
2003 |
url |
http://dx.doi.org/10.1002/ppp.446 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.446 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.446 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Active layer thickness Arctic permafrost Permafrost and Periglacial Processes Seward Peninsula Tundra Alaska |
genre_facet |
Active layer thickness Arctic permafrost Permafrost and Periglacial Processes Seward Peninsula Tundra Alaska |
op_source |
Permafrost and Periglacial Processes volume 14, issue 2, page 93-101 ISSN 1045-6740 1099-1530 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/ppp.446 |
container_title |
Permafrost and Periglacial Processes |
container_volume |
14 |
container_issue |
2 |
container_start_page |
93 |
op_container_end_page |
101 |
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1802640259924623360 |