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Vegetation History and Archaeobotany

, Volume 17, Issue 5, pp 573–583 | Cite as

Long-term changes in floristic diversity in southern Sweden: palynological richness, vegetation dynamics and land-use

  • Björn E. Berglund
  • Marie-José Gaillard
  • Leif Björkman
  • Thomas Persson
Original Article

Abstract

The rarefaction technique is applied to two Holocene pollen sequences (covering the last 12,000 calendar years) from two lakes in southern Sweden. One represents an open agricultural landscape, the other a partly wooded and less cultivated landscape. The inferred palynological richness is interpreted as an approximate measure of floristic diversity at the landscape scale. The overall trend is an increased diversity from the mid-Holocene to the Modern period, which is linked to a parallel rise in human impact. The pattern is similar for the two sites with peaks corresponding to archaeological periods characterised by deforestation and expanding settlement and agriculture. The highest diversity was reached during the Medieval period, about a.d. 1,000–1,400. Declining diversity during the last 200 years characterises the agrarian landscape. These results confirm, for southern Scandinavia, the “intermediate disturbance” hypothesis for biodiversity at the landscape scale and on millennial to century time scales. They have implications for landscape management in modern nature conservation that has the purpose of maintaining and promoting biodiversity.

Keywords

Southern Sweden Rarefaction analysis Disturbance Human impact Prehistoric land-use Landscape management 

Notes

Acknowledgments

We are very grateful to two reviewers, John Birks (University of Bergen) and Ulf Segerström (Swedish University of Agricultural Sciences), for valuable comments on the manuscript. John Birks is also acknowledged for editing the English.

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Copyright information

© Springer Verlag 2007

Authors and Affiliations

  • Björn E. Berglund
    • 1
  • Marie-José Gaillard
    • 2
  • Leif Björkman
    • 1
  • Thomas Persson
    • 1
  1. 1.Department of Geology/Quaternary Sciences, GeoBiosphere CentreLund UniversityLundSweden
  2. 2.Biology and Environmental ScienceUniversity of KalmarKalmarSweden

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