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Nordström, Eva-Maria, 2001. Människan i urskogen : vegetationshistoria i Hamra nationalpark under 2500 år. SLU, Dept. of Forest Ecology and Management, Umeå. Umeå: SLU, Dept. of Forest Ecology and Management



Pollen analysis of a peat core was used to reconstruct the last 2500 years of vegetation history, with focus on the impact of anthropogenic disturbance, in Hamra National Park, central Sweden. In addition, analysis of pollen in soil samples was performed in an attempt to locate ancient cultivation plots in the National Park.

The analysis of the peat core shows a development of the vegetation that can be divided into four stages of different degrees of human impact: A - virgin forest (c. 500 B.C.-A.D. 1300), B - grazed forest (c. A.D. 1300-1600), C - grazed forest with occasional slash-and-burn cultivation (c. A.D. 1600-1900), D - National Park (c. A.D. 1900-present). The analysis of the soil samples locates three patches where cereal cultivation plausibly has taken place. The possibility of combining pollen analysis of a peat core and of soil samples as a means of tracing cultivation in both time and space is discussed.

The forest grazing that began in the Middle Ages is interpreted as outland use, and it is possibly indicating a period of settlement expansion in the area. Increasing impact from forest grazing and occasions of slash-and-burn cultivation in the 17`h century suggest that a further expansion of human impact took place, a result which is supported by the historical records of the colonisation in the area by Finnish settlers. The result of the pollen analysis demonstrates that Hamra National Park is not a genuine virgin forest, but rather a forest influenced by human activities, such as forest grazing by cattle and manipulation of the fire regime. One consequence of the present study is that the human influence must be taken into consideration when planning the nature conservation and the management of the National Park.

Main title:Människan i urskogen
Subtitle:vegetationshistoria i Hamra nationalpark under 2500 år
Authors:Nordström, Eva-Maria
Supervisor:Segerström, Ulf
Series:Skrifter från forskningsprojektet Flexibilitet som tradition, Ängersjöprojektet
Volume/Sequential designation:2
Year of Publication:2001
Level and depth descriptor:Other
Student's programme affiliation:1140A Master of Science in Forestry, 300.0hp
Supervising department:(S) > Dept. of Forest Ecology and Management
Keywords:Hamra nationalpark, urskog, pollen, skogsbete, svedjeodling, utmarksbruk
Permanent URL:
Subject. Use of subject categories until 2023-04-30.:Forestry - General aspects
Deposited On:19 Sep 2017 09:03
Metadata Last Modified:19 Sep 2017 09:03

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