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 |
| Supervising 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 |
| Subject. Use of subject categories until 2023-04-30.: | Forestry production |
| Language: | Swedish |
| Deposited On: | 17 Apr 2013 12:57 |
| Metadata Last Modified: | 19 Apr 2013 09:01 |
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