Postglacial vegetation history of Mitkof Island, Alexander Archipelago, southeastern Alaska
An AMS radiocarbon-dated pollen record from a peat deposit on Mitkof Island, southeastern Alaska provides a vegetation history spanning ∼12,900 cal yr BP to the present. Late Wisconsin glaciers covered the entire island; deglaciation occurred > 15,400 cal yr BP. The earliest known vegetation to d...
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Cambridge University Press (CUP)
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crcambridgeupr:10.1016/j.yqres.2009.12.005 2024-09-15T17:49:33+00:00 Postglacial vegetation history of Mitkof Island, Alexander Archipelago, southeastern Alaska Ager, Thomas A. Carrara, Paul E. Smith, Jane L. Anne, Victoria Johnson, Joni 2010 http://dx.doi.org/10.1016/j.yqres.2009.12.005 http://api.elsevier.com/content/article/PII:S0033589409001641?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589409001641?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400014897 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 73, issue 2, page 259-268 ISSN 0033-5894 1096-0287 journal-article 2010 crcambridgeupr https://doi.org/10.1016/j.yqres.2009.12.005 2024-07-17T04:02:17Z An AMS radiocarbon-dated pollen record from a peat deposit on Mitkof Island, southeastern Alaska provides a vegetation history spanning ∼12,900 cal yr BP to the present. Late Wisconsin glaciers covered the entire island; deglaciation occurred > 15,400 cal yr BP. The earliest known vegetation to develop on the island (∼12,900 cal yr BP) was pine woodland ( Pinus contorta ) with alder ( Alnus ), sedges (Cyperaceae) and ferns (Polypodiaceae type). By ∼12,240 cal yr BP, Sitka spruce ( Picea sitchensis ) began to colonize the island while pine woodland declined. By ∼11,200 cal yr BP, mountain hemlock ( Tsuga mertensiana ) began to spread across the island. Sitka spruce-mountain hemlock forests dominated the lowland landscapes of the island until ∼10,180 cal yr BP, when western hemlock ( Tsuga heterophylla ) began to colonize, and soon became the dominant tree species. Rising percentages of pine, sedge, and sphagnum after ∼7100 cal yr BP may reflect an expansion of peat bog habitats as regional climate began to shift to cooler, wetter conditions. A decline in alders at that time suggests that coastal forests had spread into the island's uplands, replacing large areas of alder thickets. Cedars ( Chamaecyparis nootkatensis , Thuja plicata ) appeared on Mitkof Island during the late Holocene. Article in Journal/Newspaper Archipelago glaciers Alaska Cambridge University Press Quaternary Research 73 2 259 268 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
An AMS radiocarbon-dated pollen record from a peat deposit on Mitkof Island, southeastern Alaska provides a vegetation history spanning ∼12,900 cal yr BP to the present. Late Wisconsin glaciers covered the entire island; deglaciation occurred > 15,400 cal yr BP. The earliest known vegetation to develop on the island (∼12,900 cal yr BP) was pine woodland ( Pinus contorta ) with alder ( Alnus ), sedges (Cyperaceae) and ferns (Polypodiaceae type). By ∼12,240 cal yr BP, Sitka spruce ( Picea sitchensis ) began to colonize the island while pine woodland declined. By ∼11,200 cal yr BP, mountain hemlock ( Tsuga mertensiana ) began to spread across the island. Sitka spruce-mountain hemlock forests dominated the lowland landscapes of the island until ∼10,180 cal yr BP, when western hemlock ( Tsuga heterophylla ) began to colonize, and soon became the dominant tree species. Rising percentages of pine, sedge, and sphagnum after ∼7100 cal yr BP may reflect an expansion of peat bog habitats as regional climate began to shift to cooler, wetter conditions. A decline in alders at that time suggests that coastal forests had spread into the island's uplands, replacing large areas of alder thickets. Cedars ( Chamaecyparis nootkatensis , Thuja plicata ) appeared on Mitkof Island during the late Holocene. |
format |
Article in Journal/Newspaper |
author |
Ager, Thomas A. Carrara, Paul E. Smith, Jane L. Anne, Victoria Johnson, Joni |
spellingShingle |
Ager, Thomas A. Carrara, Paul E. Smith, Jane L. Anne, Victoria Johnson, Joni Postglacial vegetation history of Mitkof Island, Alexander Archipelago, southeastern Alaska |
author_facet |
Ager, Thomas A. Carrara, Paul E. Smith, Jane L. Anne, Victoria Johnson, Joni |
author_sort |
Ager, Thomas A. |
title |
Postglacial vegetation history of Mitkof Island, Alexander Archipelago, southeastern Alaska |
title_short |
Postglacial vegetation history of Mitkof Island, Alexander Archipelago, southeastern Alaska |
title_full |
Postglacial vegetation history of Mitkof Island, Alexander Archipelago, southeastern Alaska |
title_fullStr |
Postglacial vegetation history of Mitkof Island, Alexander Archipelago, southeastern Alaska |
title_full_unstemmed |
Postglacial vegetation history of Mitkof Island, Alexander Archipelago, southeastern Alaska |
title_sort |
postglacial vegetation history of mitkof island, alexander archipelago, southeastern alaska |
publisher |
Cambridge University Press (CUP) |
publishDate |
2010 |
url |
http://dx.doi.org/10.1016/j.yqres.2009.12.005 http://api.elsevier.com/content/article/PII:S0033589409001641?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589409001641?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400014897 |
genre |
Archipelago glaciers Alaska |
genre_facet |
Archipelago glaciers Alaska |
op_source |
Quaternary Research volume 73, issue 2, page 259-268 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1016/j.yqres.2009.12.005 |
container_title |
Quaternary Research |
container_volume |
73 |
container_issue |
2 |
container_start_page |
259 |
op_container_end_page |
268 |
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1810291283847020544 |