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Van Tour, Adriaan, 2017. Occurrence and distribution of Phytophthora spp. : affecting European beech (Fagus sylvatica) within Söderåsen National Park. Second cycle, A2E. Alnarp: SLU, Southern Swedish Forest Research Centre



There has been an increase of damage on beech in Europe since the 1990s, especially in central Europe and Germany. The first report on beech in Sweden was in 2010 in Malmö and since then there have been additional observations of symptomatic beech trees at multiple locations, among which Söderåsens national park is one such location. The aim of this thesis was to investigate which Phytophthora species are present at Söderåsen and to confirm previous observations of symptomatic trees within the park. Through tissue plating and environmental sequencing the presence of Phytophthora at Söderåsen was confirmed, specifically Phytophthora plurivora and Phytophthora cambivora, of which P. plurivora is a newly confirmed species. The main spreading pathway of Phytophthora in Europe is thought to be via nursery stocks. Between 2002 and 2006 many trees were planted at Söderåsen, grown at nursery stocks in Germany and Poland. This is one possible spreading pathway through which Phytophthora may have become established at Söderåsen. Finally, this thesis gives further suggestions for management strategies within the park, of which monitoring of new symptomatic trees is the most pressing one. The success of sampling Phytophthora is heavily dependent on the freshness of the sampled lesions. For further research it is of importance to sample symptomatic trees soon after discovery for best chance of isolation success. These results give further understanding of the Phytophthora situation at Söderåsen, however there is still a lot to understand about these pathogens and how they interact with their surroundings. Further monitoring and management strategies will be needed for the future ensuring of Söderåsen as a hotspot for nature conservation in Sweden and Scandinavia.

Main title:Occurrence and distribution of Phytophthora spp.
Subtitle:affecting European beech (Fagus sylvatica) within Söderåsen National Park
Authors:Van Tour, Adriaan
Supervisor:Cleary, Michelle
Examiner:Brunet, Jörg
Series:Examensarbete / SLU, Institutionen för sydsvensk skogsvetenskap
Volume/Sequential designation:275
Year of Publication:2017
Level and depth descriptor:Second cycle, A2E
Student's programme affiliation:None
Supervising department:(S) > Southern Swedish Forest Research Centre
Keywords:Phytophthora cambivora, Söderåsen National Park, beech, fagus sylvatica, Phytophthora plurivora, soil baiting, tissue plating, environmental sequencing
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Subject. Use of subject categories until 2023-04-30.:Forestry - General aspects
Deposited On:25 Jan 2017 13:57
Metadata Last Modified:25 Jan 2017 13:57

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