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Ahlström, Anton and Brihem, Andreas, 2013. Människans roll i skogslandskapets trädslagssammansättning, en studie i Ångermanland. First cycle, G2E. Umeå: SLU, Dept. of Forest Ecology and Management

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Abstract

Human presence has always influenced the surrounding areas, the forest as well. Structure and species composition have changed during human land use. Knowledge regarding these changes should be of great interest for conservation and forestry. We have analyzed human impact on the tree species composition on five study sites during 2000 years in Ångermanland, Sweden. More specifically the change in tree species composition in percentage amongst alder, birch, spruce and pine over time. This was accomplished with pollen data from five sites. The pollen data has been converted with the value R, this was done to transform pollen percentage to tree species composition. Shannons diversity index
was used to illustrate the changes we’ve studied. Three study sites cover the 20th century and
shows higher levels in the diversity index the last century than at any time during the period before human cultivation became continuous. Four out of five study sites have shown higher values in the diversity index among the four tree species during the continuous human cultivation than previous period.

Main title:Människans roll i skogslandskapets trädslagssammansättning, en studie i Ångermanland
Authors:Ahlström, Anton and Brihem, Andreas
Supervisor:Segerström, Ulf
Examiner:Mörling, Tommy
Series:Kandidatarbeten i skogsvetenskap / SLU, Fakulteten för skogsvetenskap
Volume/Sequential designation:2012:2
Year of Publication:2013
Level and depth descriptor:First cycle, G2E
Student's programme affiliation:SY001 Forest Science - Master's Programme 300 HEC
Department:(S) > Dept. of Forest Ecology and Management
Keywords:pollenanalys, R-värde, störning, skogshistoria, kolonisation
URN:NBN:urn:nbn:se:slu:epsilon-s-2154
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-s-2154
Subjects:Forestry production
Language:Swedish
Deposited On:17 Apr 2013 12:57
Metadata Last Modified:19 Apr 2013 09:01

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