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Natural Establishment of Specialist Plant Species after Topsoil Removal and Soil Perturbation in Degraded Calcareous Sandy Grassland

Author:
  • Pål Axel Olsson
  • Anja Ödman
Publishing year: 2014
Language: English
Pages: 49-56
Publication/Series: Restoration Ecology
Volume: 22
Issue: 1
Document type: Journal article
Publisher: Wiley-Blackwell

Abstract english

Specialist plant species in calcareous sandy grasslands are threatened by acidification and high nutrient levels in the topsoil. We investigated whether topsoil removal and soil perturbation in degraded sandy grasslands could lead to establishment of specialist species belonging to the threatened xeric sand calcareous grassland habitat. Restoration actions performed in 2006 resulted in increased soil pH and reduced nitrogen availability. We found early colonisztion of the perennial key species Koeleria glauca after both deep perturbation and topsoil removal, and high seedling establishment in topsoil removal plots 5 and 6years following the restoration treatment (2011-2012). After topsoil removal, overall vegetation composition in 2012 had developed toward the undegraded community, with target species accounting for 20% of the community after topsoil removal, compared to 30% in the undegraded vegetation, and less than 1% in untreated controls. Deep perturbation led to 7% target species, while there were almost no effects of shallow perturbation 6years following treatment. These results demonstrate that topsoil removal can promote colonization of target species of calcareous sandy grassland and highlights the importance of considering the regeneration niche for target species when implementing restoration measures.

Keywords

  • Ecology
  • disturbance
  • grassland restoration
  • lime
  • nutrient availability
  • pH
  • threatened plant species
  • vegetation

Other

Published
  • BECC
  • ISSN: 1061-2971
Pål Axel Olsson
E-mail: pal_axel [dot] olsson [at] biol [dot] lu [dot] se

Professor

Biodiversity

+46 46 222 42 47

E-A323

50

Research group

Plant Biology

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Theodor Kindeberg

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