Tracing and interpreting fine-scale human impact in northern Fennoscandia with the aid of modern pollen analogues |
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Authors: | Satu Räsänen |
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Institution: | (1) Department of Geography, P. O. Box 3000, FIN-90014 University of Oulu, Finland. Email: satu.rasanen@oulu.fi, FI |
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Abstract: | A set of moss samples (n=58) was collected and analysed to obtain modern pollen analogues for both natural and human induced
vegetation types in northern Fennoscandia. Vegetation types with settlement, trampling and grazing were selected from the
different latitudinal forest zones (birch, pine, and mixed forest). The moss species varied between samples but the size of
the sample was kept constant. Numerical analyses such as Redundancy Analysis (RDA) indicate that in northern areas human presence
is mainly visible as increased values of Gramineae, Rumex acetosa/acetosella, R. obtusifolius, Solidago-type and Achillea-type pollen. Partial RDA further reveals that settlement is strongly correlated with high values of Rumex acetosa/acetosella, whereas trampled sites are significantly characterised by Gramineae and, to a smaller extent, Cyperaceae pollen. It is therefore
possible to distinguish the impact of different types of human activities on vegetation on the basis of the pollen spectra.
Later, these data will be used to interpret the presence, nature, and duration of human impact from fossil records from the
same area.
Received June 6, 2001 / Accepted December 12, 2001 |
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Keywords: | : Modern pollen analogues – Settlement – Trampling – Redundancy Analysis (RDA) – Northern Fennoscandia |
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