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

  • Björn Berglund
  • Merie-José Gaillard
  • Leif Björkman
  • Thomas Persson
Publishing year: 2008
Language: English
Pages: 573-583
Publication/Series: Vegetation History and Archaeobotany
Volume: 17
Issue: 5
Document type: Journal article
Publisher: Springer

Abstract english

Abstract in Undetermined

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.


  • Geology
  • southern Sweden
  • rarefaction analysis
  • disturbance
  • human impact
  • prehistoric land-use
  • landscape management


  • ISSN: 0939-6314
Björn E Berglund
E-mail: bjorn [dot] berglund [at] geol [dot] lu [dot] se

Professor emeritus

Quaternary Sciences