Abstract

Intensive forest management has led to a population decline in many species, including those dependent on dead wood. Many lichens are known to depend on dead wood, but their habitat requirements have been little studied. In this study we investigated the habitat requirements of wood dependent lichens on coarse dead wood (diameter > 10 cm) of Scots pine Pinus sylvestris in managed boreal forests in central Sweden. Twenty-one wood dependent lichen species were recorded, of which eleven were confined to old (estimated to be > 120 years old) and hard dead wood. Almost all of this wood has emanated from kelo trees, i.e. decorticated and resin-impregnated standing pine trees that died long time ago. We found four red-listed species, of which two were exclusive and two highly associated with old and hard wood. Lichen species composition differed significantly among dead wood types (low stumps, snags, logs), wood hardness, wood age and occurrence of fire scars. Snags had higher number of species per dead wood area than logs and low stumps, and old snags had higher number of species per dead wood area than young ones. Since wood from kelo trees harbours a specialized lichen flora, conservation of wood dependent lichens requires management strategies ensuring the future presence of this wood type. Besides preserving available kelo wood, the formation of this substratum should be supported by setting aside P. sylvestris forests and subject these to prescribed burnings as well as to allow wild fires in some of these forests.

Keywords

Coarse woody debris; Fire scars; Habitat requirements; Saproxylic species; Kelo

Published in

Biodiversity and Conservation
2017, Volume: 26, number: 6, pages: 1295-1310
Publisher: SPRINGER

SLU Authors

• Santaniello, Francesca

  • Department of Ecology, Swedish University of Agricultural Sciences
    
  • Forestry Research Institute of Sweden, Skogforsk

• Ranius, Thomas

  • Department of Ecology, Swedish University of Agricultural Sciences
    

• Sjögren, Jörgen

  • Department of Wildlife, Fish and Environmental Studies, Swedish University of Agricultural Sciences
    

• Thor, Göran

  • Department of Ecology, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Ecology


More information

Correction in: Biodiversity and Conservation, 2018, Volume 27, Page 3559, DOI: 10.1007/s10531-018-1609-8


Publication identifier

DOI: https://doi.org/10.1007/s10531-017-1301-4

Permanent link to this page (URI)

https://res.slu.se/id/publ/82902