diversity and species interactions during the decomposition of Norway spruce
Succession of wood-inhabiting fungal communities.
Acta Universitatis agriculturae Sueciae, 1652-6880
Dead wood constitutes an important substrate for biodiversity in boreal forests. As the wood decays, fungal communities develop and species associations are formed. Species interactions are thought to affect community development, but the mycelial dynamics within fungal communities are poorly understood.
In this thesis the diversity and temporal dynamics within fungal communities
in Norway spruce logs are studied. In particular, patterns of diversity and mechanisms during community assembly are investigated. 454 sequencing is applied to study the less well-known fungal diversity and fine-scale mycelial distribution patterns in decaying logs. The influence of priority effects during community assembly is studied using time-series data from re-inventoried logs. The importance of wood-modification by a primary species and competition is examined in species interaction laboratory experiments.
454 sequencing revealed species-rich fungal communities with diverse ecological roles. Wood-decaying basidiomycetes was found to be the most abundant ecological group, and saprotrophic, mycorrhizal and parasitic fungi were regularly detected. Mycobiont partners of lichens were isolated from interior parts of logs. Fine-scale distribution within logs revealed that resource utilization reflects the life histories of fungal taxa. More decayed samples hosted a higher number of taxa, particularly ascomycetes, whereas wood-decaying basidiomycetes were found in less decayed wood. Priority effects in terms of different mortality factors of trees and the presence of primary decay species were found to affect the subsequent community composition. A species-specific response to primary decay and antagonistic
interactions significantly affected decay rate and growth. It is concluded that priority effects are more important in early stages of community development while species more frequent in middle stages of decomposition relies more upon competitive abilities.
|Title:||Succession of wood-inhabiting fungal communities|
|Subtitle:||diversity and species interactions during the decomposition of Norway spruce|
|Series/Journal:||Acta Universitatis agriculturae Sueciae (1652-6880)|
|Year of publishing :||March 2013|
|Number of Pages:||61|
|Place of Publication:||Uppsala|
|Publisher:||Institutionen för skoglig mykologi och växtpatologi, Sveriges lantbruksuniversitet|
|ISBN for printed version:||978-91-576-7774-7|
|Publication Type:||Doctoral thesis|
|Full Text Status:||Public|
|Agris subject categories.:||F Plant production > F40 Plant ecology|
K Forestry > K01 Forestry - General aspects
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:||boreal forests, picea abies, wood decay, fungi, ecological succession, species, deadwood, plant communities, biodiversity|
|Keywords:||Boreal forest, Wood-decaying fungi, Succession, Dead wood, Life-history traits, Picea abies, Species interactions, Environmental sequencing|
|Department:||(NL, NJ) > Dept. of Forest Mycology and Plant Pathology|
(S) > Dept. of Forest Mycology and Plant Pathology
|Deposited By:||Elisabet Ottosson|
|Deposited On:||28 Feb 2013 07:14|
|Metadata Last Modified:||14 Dec 2014 18:49|
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