The Holocene Spread of Spruce in Scandinavia
The Holocene spread of Picea abies in Scandinavia provides an excellent opportunity for detailed study of the dynamics of tree spread and population expansion. Early- and mid-Holocene macrofossil evidence for the presence of Picea abies in Scandinavia has questioned traditional interpretations of th...
Main Author: | |
---|---|
Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
Published: |
Uppsala universitet, Institutionen för geovetenskaper
2004
|
Subjects: | |
Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-4623 |
id |
ftuppsalauniv:oai:DiVA.org:uu-4623 |
---|---|
record_format |
openpolar |
spelling |
ftuppsalauniv:oai:DiVA.org:uu-4623 2023-05-15T16:12:14+02:00 The Holocene Spread of Spruce in Scandinavia Giesecke, Thomas 2004 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-4623 eng eng Uppsala universitet, Institutionen för geovetenskaper Uppsala : Acta Universitatis Upsaliensis Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, 1104-232X 1027 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-4623 urn:isbn:91-554-6064-X info:eu-repo/semantics/openAccess Quaternary geology Picea abies pollen analyses tree migration population dynamics Kvartärgeologi Doctoral thesis, comprehensive summary info:eu-repo/semantics/doctoralThesis text 2004 ftuppsalauniv 2023-02-23T21:44:17Z The Holocene spread of Picea abies in Scandinavia provides an excellent opportunity for detailed study of the dynamics of tree spread and population expansion. Early- and mid-Holocene macrofossil evidence for the presence of Picea abies in Scandinavia has questioned traditional interpretations of the timing and direction of its spread. This study aims to determine the pattern of the spread of Picea abies in Scandinavia from pollen and other data, to evaluate the significance of possible early outpost populations and to deduce possible factors that influenced the spread and population expansion of Picea abies in Scandinavia. Palaeoecological investigations were carried out on the sediments of four small lakes in central Sweden to gain detailed insight into the dynamics of the spread. Holocene pollen diagrams with independent dating control were collected from Fennoscandia and adjacent areas to compare the timing of selected features of the Picea abies pollen curve. Computer models were used to test possible scenarios for the spread and Picea abies population expansion. Picea abies entered the Scandinavian peninsula from the east at different times and by different pathways. Early-Holocene outposts can be discerned in pollen records from northwest Russia, eastern and northeastern Finland for the time before 9000 cal. BP. Pollen records from Sweden and Norway indicate small Picea abies populations after 8000 cal. BP. The mid to late-Holocene spread, which superficially resembles a front-like pattern, may in fact represent a wave of expanding populations. Disturbance through fire and human activity did not significantly influence the pattern of the spread. Changing climate parameters, slow adaptation and gene flow through seeds and pollen have to be considered as possible explanations for the late spread of the tree. Population dynamics and propagule pressure are likely to be important factors that shaped the spread of Picea abies. Doctoral or Postdoctoral Thesis Fennoscandia Northwest Russia Uppsala University: Publications (DiVA) Norway |
institution |
Open Polar |
collection |
Uppsala University: Publications (DiVA) |
op_collection_id |
ftuppsalauniv |
language |
English |
topic |
Quaternary geology Picea abies pollen analyses tree migration population dynamics Kvartärgeologi |
spellingShingle |
Quaternary geology Picea abies pollen analyses tree migration population dynamics Kvartärgeologi Giesecke, Thomas The Holocene Spread of Spruce in Scandinavia |
topic_facet |
Quaternary geology Picea abies pollen analyses tree migration population dynamics Kvartärgeologi |
description |
The Holocene spread of Picea abies in Scandinavia provides an excellent opportunity for detailed study of the dynamics of tree spread and population expansion. Early- and mid-Holocene macrofossil evidence for the presence of Picea abies in Scandinavia has questioned traditional interpretations of the timing and direction of its spread. This study aims to determine the pattern of the spread of Picea abies in Scandinavia from pollen and other data, to evaluate the significance of possible early outpost populations and to deduce possible factors that influenced the spread and population expansion of Picea abies in Scandinavia. Palaeoecological investigations were carried out on the sediments of four small lakes in central Sweden to gain detailed insight into the dynamics of the spread. Holocene pollen diagrams with independent dating control were collected from Fennoscandia and adjacent areas to compare the timing of selected features of the Picea abies pollen curve. Computer models were used to test possible scenarios for the spread and Picea abies population expansion. Picea abies entered the Scandinavian peninsula from the east at different times and by different pathways. Early-Holocene outposts can be discerned in pollen records from northwest Russia, eastern and northeastern Finland for the time before 9000 cal. BP. Pollen records from Sweden and Norway indicate small Picea abies populations after 8000 cal. BP. The mid to late-Holocene spread, which superficially resembles a front-like pattern, may in fact represent a wave of expanding populations. Disturbance through fire and human activity did not significantly influence the pattern of the spread. Changing climate parameters, slow adaptation and gene flow through seeds and pollen have to be considered as possible explanations for the late spread of the tree. Population dynamics and propagule pressure are likely to be important factors that shaped the spread of Picea abies. |
format |
Doctoral or Postdoctoral Thesis |
author |
Giesecke, Thomas |
author_facet |
Giesecke, Thomas |
author_sort |
Giesecke, Thomas |
title |
The Holocene Spread of Spruce in Scandinavia |
title_short |
The Holocene Spread of Spruce in Scandinavia |
title_full |
The Holocene Spread of Spruce in Scandinavia |
title_fullStr |
The Holocene Spread of Spruce in Scandinavia |
title_full_unstemmed |
The Holocene Spread of Spruce in Scandinavia |
title_sort |
holocene spread of spruce in scandinavia |
publisher |
Uppsala universitet, Institutionen för geovetenskaper |
publishDate |
2004 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-4623 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Fennoscandia Northwest Russia |
genre_facet |
Fennoscandia Northwest Russia |
op_relation |
Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, 1104-232X 1027 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-4623 urn:isbn:91-554-6064-X |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1765997496330354688 |