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Resilience of Phialocephala fortinii s.l. – Acephala applanata communities – Effects of disturbance and strain introduction

Authors :
Valentin Queloz
Thomas N. Sieber
Vivanne Dubach
Sophie Stroheker
Source :
Fungal Ecology. 31:19-28
Publication Year :
2018
Publisher :
Elsevier BV, 2018.

Abstract

Members of the Phialocephala fortinii s.l. – Acephala applanata species complex (PAC) are ubiquitous endophytes forming complex communities in roots of conifers and ericaceous shrubs across the Northern hemisphere. Two kinds of disturbances (clear-cutting and drought) and their effects on the resident PAC community, as well as on the introduction of alien strain 7_45_5, were investigated using mesocosms with natural Norway spruce ( Picea abies ) regeneration, both under controlled climate chamber conditions and natural conditions in the forest. This is the first record of successful strain introduction into a well-established forest ecosystem. Introduction was more successful when planting inoculated living spruce saplings, compared to inoculation using autoclaved colonized roots. 7_45_5 was less assertive in the forest, where Phialocephala subalpina clearly dominated. Clear-cutting favored A. applanata and simultaneously reduced the overall frequency of PAC. Drought only had a significant influence on 7_45_5, which was more abundant in dry than moist, non-clear-cut plots. To conclude, disturbances and arrival of foreign strains can alter resident PAC communities significantly.

Details

ISSN :
17545048
Volume :
31
Database :
OpenAIRE
Journal :
Fungal Ecology
Accession number :
edsair.doi...........45a1e1c34a5e7a5c48dea48bf3884f25
Full Text :
https://doi.org/10.1016/j.funeco.2017.10.006