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Occurrence patterns of dead wood and wood-dependent lichens in managed boreal forest landscapes

Svensson, Måns (2013). Occurrence patterns of dead wood and wood-dependent lichens in managed boreal forest landscapes. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 ; 2013:84
ISBN 978-91-576-7906-2
eISBN 978-91-576-7906-9
[Doctoral thesis]

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Dead wood is a key resource for biodiversity, on which thousands of forest organisms are dependent. Because of current forest management, there has been a large-scale change in dead wood amounts and qualities, and consequently, many wood-dependent species are threatened. The general aim of this thesis is to increase our understanding of habitat requirements and occurrence patterns of wood-dependent lichens in managed, boreal forest landscapes. We surveyed dead wood and wood-dependent lichens in three study landscapes of managed boreal forest in southern Sweden. The observed occurrence patterns of dead wood in the studied landscapes are to a large extent attributable to management practices, with clear-felling as the main driver of dead wood input. Harvesting forest biomass for bio-fuel production will cause wood-dependent lichens species to decline. Coarse woody debris is important for wood-dependent lichens, but stumps, snags and logs host different species assemblages. Snags are rare in managed forest landscapes and increasing the landscape-scale amount of them would benefit wood-dependent lichens. The previously neglected dead wood type of dead branches on living trees make up a large portion of all dead wood available to wood-dependent species in managed boreal forests. Fine woody debris, including both branches on the ground and dead branches attached to living trees, was, however, found to have a low relative importance for wood-dependent lichens. We modeled species abundance in relation to characteristics of dead wood objects and forest stands, and estimated the landscape-scale abundance of wood-dependent lichens. Young managed forests <60 years of age held the largest populations of these species, because such stands contain more coarse woody debris per hectare than older forests or forested mires, and they occupy a much larger total area. Keeping parts of the landscape outside the forestry system is probably necessary to maintain the landscape-scale persistence of dead wood types that are rarely created within standard management regimes. To conserve the most threatened wood-dependent species, it is necessary to find ways to create and maintain dead wood types and qualities that are currently rare in managed boreal forest landscapes.

Authors/Creators:Svensson, Måns
Title:Occurrence patterns of dead wood and wood-dependent lichens in managed boreal forest landscapes
Series Name/Journal:Acta Universitatis Agriculturae Sueciae
Year of publishing :2013
Number of Pages:50
I.Svensson, M., Dahlberg, A., Ranius, T. & Thor, G. (2013). Occurrence patterns of lichens on stumps in young managed forests. PLoS ONE 8(4): e62825.
II.Svensson, M., Dahlberg, A., Ranius, T. & Thor, G. (2013). Dead branches on living trees constitute a large part of the dead wood in managed boreal forests, but are not important for wood-dependent lichens. Journal of Vegetation Science (in press).
III.Svensson, M., Johansson, V., Dahlberg, A., Frisch, A., Thor, G. & Ranius, T. The relative importance of different forest and dead wood types as habitat for wood-dependent lichens in managed boreal forest landscapes (manuscript).
IV.Svensson, M., Caruso, A., Thor, G. & Snäll, T. Combined observational and experimental data provide no support for facilitation in lichens (manuscript).
Place of Publication:Uppsala
Publisher:Department of Ecology, Swedish University of Agricultural Sciences
ISBN for printed version:978-91-576-7906-2
ISBN for electronic version:978-91-576-7906-9
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:K Forestry > K10 Forestry production
P Natural resources > P01 Nature conservation and land resources
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Forest Science
Agrovoc terms:deadwood, lichenes, endangered species, biodiversity, habitats, branches, stumps, forest management, boreal forests, nature conservation, sweden
Keywords:biodiversity, bio-fuel harvest, coarse woody debris, fine woody debris, habitat requirements, lignicolous, mycobiont, photobiont, saproxylic
Permanent URL:
ID Code:10892
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology
External funders:Energimyndigheten
Deposited By: Måns Svensson
Deposited On:12 Nov 2013 07:17
Metadata Last Modified:13 Dec 2014 18:46

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