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Di Marino, Erika (2008) The ectomycorrhizal community structure in beech coppices of different age. [Tesi di dottorato]

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Abstract (inglese)

The species composition of ectomycorrhizal (ECM) fungal communities can be strongly influenced by the sylvicultural practises, abiotic and biotic factors, which determine interactions among the species. In order to determine the influence of the coppicing on EM community, the shoot age, bedrock types, exposure, slope, humus features, soil conditions, sampling points locations were taken into account as the most representative and influencing factors in these soil ecological dynamics. In summer 2005, 2006 and 2007, in 7 [2-48-years-old] Beech [Fagus sylvatica (L.) Karst.] coppices located in the Province of Trento (northern Italy), a monitoring on the the root tipes was applied to compare these sites, and to give an additional instrument like a synthetic biological indicator for the traditional management strategies.
In the present study the results confirmed the ectomycorrhizal community structure investigated in 7 beech coppices of different age was typical with the occurrence of few abundant species and many others with significantly lower abundance. Cenococcum geophilum was the most frequently detected species in each site and in each sample date. Morphological, anatomical and molecular investigations revealed a total of 60 anatomotypes. Of these 35 were unknown on Fagus sylvatica up to now. The investigations on the community composition can be considered a great contribute to the biodiversity of the Beech forest, with four detailed species descriptions: Fagirhiza byssoporioides, Fagirhiza entolomoides, Fagirhiza stellata and Hygrophorus penarius. Additional investigations using also the stable isotopes were necessary to understand the parasitic attitude showed by this species in the years 2006-2007 in these coppices.
The investigation of the ECM community composition (species richness evenness, and dispertion, vitality and rate of mycorrhization) in relation to the shoot age and to the main ecological factors revealed the absence of a real reaction to the coppicing, and the major importance of the slope or other ecological conditions to understand the species distribution.
An aggregation of the species was releaved, but the species features didn't show a clear correlation with the ecological stands conditions, concerning the spatial distribution and the soil horizons.
The results suggest an hypothesis that the coppice treatment in Beech, didn't have a significant effect on the EM community structure since 2 until 48 years from coppicing. Considering the stability of the EM community as a bioindicator of the ecosystem resilience, it can be suppose that a rational coppicing treatment could be a sustainable human activity, compatible with the ecosystem dynamics with these environmental conditions. Two more EM descriptions were performed: Pseudotomentella humicola on Picea abies and Sistotrema muscicola on Castanea sativa.


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Tipo di EPrint:Tesi di dottorato
Relatore:Montecchio, Lucio - Reinhard, Agerer
Dottorato (corsi e scuole):Ciclo 20 > Scuole per il 20simo ciclo > TERRITORIO, AMBIENTE, RISORSE E SALUTE > ECOLOGIA (ECOLOGIA FORESTALE)
Data di deposito della tesi:31 Gennaio 2008
Anno di Pubblicazione:31 Gennaio 2008
Parole chiave (italiano / inglese):ectomycorrhizal, community, coppice, short rotation, Fagus sylvatica, parasitism, Hygrophorus penarius, Sistotrema muscicola, Pseudotomentella humicola, bioindicator
Settori scientifico-disciplinari MIUR:Area 05 - Scienze biologiche > BIO/07 Ecologia
Struttura di riferimento:Dipartimenti > Dipartimento Territorio e Sistemi Agro-Forestali
Codice ID:731
Depositato il:04 Nov 2008
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