Holocene development of Boreal forests and fire regimes on the Kenai Lowlands
Abstract: Several studies have noted a relationship between vegetation type and fire frequency, yet despite the importance of ecosystem processes such as fire the long-term relationships between disturbance, climate and vegetation type are incompletely understood. We analysed pollen, plant macrofoss...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.490.436 2023-05-15T18:40:15+02:00 Holocene development of Boreal forests and fire regimes on the Kenai Lowlands The Pennsylvania State University CiteSeerX Archives 2005 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.490.436 http://www2.nau.edu/envsci/faculty/ScottAnderson/docs/86_Anderson et al Paradox Lake.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.490.436 http://www2.nau.edu/envsci/faculty/ScottAnderson/docs/86_Anderson et al Paradox Lake.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www2.nau.edu/envsci/faculty/ScottAnderson/docs/86_Anderson et al Paradox Lake.pdf text 2005 ftciteseerx 2016-01-08T08:28:46Z Abstract: Several studies have noted a relationship between vegetation type and fire frequency, yet despite the importance of ecosystem processes such as fire the long-term relationships between disturbance, climate and vegetation type are incompletely understood. We analysed pollen, plant macrofossils and sedimentary charcoal from three lakes within the Kenai lowlands to determine postglacial relationships between disturbance, climate and vegetation for the Boreal forest of southwest Alaska. An herb tundra was established in the lowlands following deglaciation by 13 000 cal. BP. Salix, Alnus and probably Betula kenaica, expanded in the area after 10 700 cal. BP, followed by Picea glauca by 8500 cal. BP. Picea mariana became established by 4600 cal. BP. The early Holocene was probably the driest time during the postglacial, as determined by aquatic plant macrofossils and climate models. Lake levels reached near-modern conditions by at least 8000 cal. BP. Mean Fire Intervals (MFI) were longest during the shrubherb tundra phase (1389/65 yr), decreased after expansion of B. kenaica, Salix and Populus (779/49 yr) and Picea glauca (819/41 yr), and increased again with the arrival of P. mariana (1309/66 yr). Unlike previous studies, our data demonstrate the highest fire frequencies during the early to mid-Holocene and less frequent fire during the late Holocene when P. mariana forests dominated the lowlands. Early Holocene forests of P. glauca and B. kenaica existed in summers that were longer and drier than today, while the Text Tundra Alaska Unknown |
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English |
description |
Abstract: Several studies have noted a relationship between vegetation type and fire frequency, yet despite the importance of ecosystem processes such as fire the long-term relationships between disturbance, climate and vegetation type are incompletely understood. We analysed pollen, plant macrofossils and sedimentary charcoal from three lakes within the Kenai lowlands to determine postglacial relationships between disturbance, climate and vegetation for the Boreal forest of southwest Alaska. An herb tundra was established in the lowlands following deglaciation by 13 000 cal. BP. Salix, Alnus and probably Betula kenaica, expanded in the area after 10 700 cal. BP, followed by Picea glauca by 8500 cal. BP. Picea mariana became established by 4600 cal. BP. The early Holocene was probably the driest time during the postglacial, as determined by aquatic plant macrofossils and climate models. Lake levels reached near-modern conditions by at least 8000 cal. BP. Mean Fire Intervals (MFI) were longest during the shrubherb tundra phase (1389/65 yr), decreased after expansion of B. kenaica, Salix and Populus (779/49 yr) and Picea glauca (819/41 yr), and increased again with the arrival of P. mariana (1309/66 yr). Unlike previous studies, our data demonstrate the highest fire frequencies during the early to mid-Holocene and less frequent fire during the late Holocene when P. mariana forests dominated the lowlands. Early Holocene forests of P. glauca and B. kenaica existed in summers that were longer and drier than today, while the |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
title |
Holocene development of Boreal forests and fire regimes on the Kenai Lowlands |
spellingShingle |
Holocene development of Boreal forests and fire regimes on the Kenai Lowlands |
title_short |
Holocene development of Boreal forests and fire regimes on the Kenai Lowlands |
title_full |
Holocene development of Boreal forests and fire regimes on the Kenai Lowlands |
title_fullStr |
Holocene development of Boreal forests and fire regimes on the Kenai Lowlands |
title_full_unstemmed |
Holocene development of Boreal forests and fire regimes on the Kenai Lowlands |
title_sort |
holocene development of boreal forests and fire regimes on the kenai lowlands |
publishDate |
2005 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.490.436 http://www2.nau.edu/envsci/faculty/ScottAnderson/docs/86_Anderson et al Paradox Lake.pdf |
genre |
Tundra Alaska |
genre_facet |
Tundra Alaska |
op_source |
http://www2.nau.edu/envsci/faculty/ScottAnderson/docs/86_Anderson et al Paradox Lake.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.490.436 http://www2.nau.edu/envsci/faculty/ScottAnderson/docs/86_Anderson et al Paradox Lake.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766229534467686400 |