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Bark beetles facilitate the establishment of wood decay fungi

Strid, Ylva Maria Elisabeth (2012). Bark beetles facilitate the establishment of wood decay fungi. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 ; 2012:72
ISBN 978-91-576-7719-8
[Doctoral thesis]

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Forests in the northern hemisphere are largely dominated by conifers and provide a key habitat for a multitude of species. Wood decay fungi, i.e. basidiomycetes, are important for nutrient cycling. Saproxylic insects may facilitate the fungal colonization by opening up bark layer, provide a court for introduction, or they can specifically or loosely vector fungal propagules to the substrate.

The aim of the thesis was to clarify the role of insects for dispersal of fungal spores and propagules to Norway spruce stem sections, determine whether mycelial establishment was aided by holes in the bark created by the bark beetle, examine the early succession of fungal diversity in dead wood, and determine whether the hibernation environments for Ips typographus have an impact on the fungal community dispersed by the bark beetle.

Further analysis was conducted on wood material from high stumps and stem sections, mycelia from high stumps, and bark beetles from high stumps, stem sections, standing trees and forest litter. Pure culture isolation, T-RFLP, cloning and 454-sequencing were methods used to explain the fungal community composition.

It was concluded that (i) bark beetles contribute to the establishment of wood decay fungi and act as random vectors; (ii) the fungal community vectored by the bark beetle is depending on the hibernation environment; (iii) beetle entrance and emergence holes on their own have little or no effect on the substrate availability for air-dispersed fungal species; (iv) the fungal community changes drastically in newly created dead wood and the ecological interaction between fungi and dead wood is complex; and (v) the complexity of the fungal community detected is influenced by the method used to analyze it.

Overall, bark beetles have a major impact on fungal dispersal and colonization success of wood-decay fungi.

Authors/Creators:Strid, Ylva Maria Elisabeth
Title:Bark beetles facilitate the establishment of wood decay fungi
Series Name/Journal:Acta Universitatis Agriculturae Sueciae
Year of publishing :October 2012
Number of Pages:46
I.Ylva Persson, Katarina Ihrmark, Jan Stenlid (2011). Do bark beetles facilitate the establishment of rot fungi in Norway spruce? Fungal ecology ournal 4, 262-269.
II.Ylva Persson, Rimvydas Vasaitis, Bo Långström, Petter Öhrn, Katarina Ihrmark, Jan Stenlid (2009). Fungi vectored by the bark beetle Ips typographus following hibernation under the bark of standing trees and in the forest litter. Fungal Microbiology 58, 651-659.
III.Ylva Strid, Martin Schroeder, Björn Lindahl, Katarina Ihrmark, Jan Stenlid. Bark beetles have a decisive impact on fungal community in Norway spruce stem sections. (Manuscript).
IV.Ylva Strid, Katarina Ihrmark, Jan Stenlid. The primer fITS9 avoids chimera formation when amplifying ITS in a bark beetle DNA background (Manuscript).
Place of Publication:Uppsala
Publisher:Dept. of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences
ISBN for printed version:978-91-576-7719-8
Additional Information:These projects were founded by the Swedish University of Agricultural Sciences, the Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning (FORMAS), by the Swedish Energy Agency (STEM).
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:F Plant production > F40 Plant ecology
K Forestry > K01 Forestry - General aspects
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Agrovoc terms:ips typographus, timber boring insects, picea abies, wood decay, fungi, fungal spores, dna sequence, ecological succession, deadwood, boreal forests, sweden
Keywords:Fungal succession, Wood-decay fungi, Bark beetle, Picea abies, T-RFLP, 454-sequencing
Permanent URL:
ID Code:9030
Department:(NL, NJ) > Dept. of Forest Mycology and Plant Pathology
(S) > Dept. of Forest Mycology and Plant Pathology
External funders:FORMAS
Deposited By: Ylva Strid
Deposited On:21 Sep 2012 13:30
Metadata Last Modified:02 Dec 2014 10:51

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