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Fungal disease incidence along tree diversity gradients depends on latitude in European forests

Nguyen, Diem and Castagneyrol, Bastien and Bruelheide, Helge and Bussotti, Filippo and Guyot, Virginie and Jactel, Hervé and Jaroszewicz, Bogdan and Valladares, Fernando and Stenlid, Jan and Boberg, Johanna Fungal disease incidence along tree diversity gradients depends on latitude in European forests. (2016) Ecology and Evolution, 6 (8). 2426-2438. ISSN 2045-7758

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Official URL: http://dx.doi.org/10.1002/ece3.2056

Abstract

European forests host a diversity of tree species that are increasingly threatened by fungal pathogens, which may have cascading consequences for forest ecosystems and their functioning. Previous experimental studies suggest that foliar and root pathogen abundance and disease severity decrease with increasing tree species diversity, but evidences from natural forests are rare. Here, we tested whether foliar fungal disease incidence was negatively affected by tree species diversity in different forest types across Europe. We measured the foliar fungal disease incidence on 16 different tree species in 209 plots in six European countries, representing a forest-type gradient from the Mediterranean to boreal forests. Forest plots of single species (monoculture plots) and those with different combinations of two to five tree species (mixed species plots) were compared. Specifically, we analyzed the influence of tree species richness, functional type (conifer vs. broad-leaved) and phylogenetic diversity on overall fungal disease incidence. The effect of tree species richness on disease incidence varied with latitude and functional type. Disease incidence tended to increase with tree diversity, in particular in northern latitudes. Disease incidence decreased with tree species richness in conifers, but not in broadleaved trees. However, for specific damage symptoms, no tree species richness effects were observed. Although the patterns were weak, susceptibility of forests to disease appears to depend on the forest site and tree type.

Item Type:Article
Additional Information:Thanks to Wiley Open Access editor. The definitive version is available at http://onlinelibrary.wiley.com/ The original PDF of the article can be found at http://onlinelibrary.wiley.com/doi/10.1002/ece3.2056/full
HAL Id:hal-01386730
ProdINRA Id:350529
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Consejo Superior de Investigaciones Científicas - CSIC (SPAIN)
Other partners > Deutsche Forschungsgemeinschaft - DFG (GERMANY)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
French research institutions > Institut National de la Recherche Agronomique - INRA (FRANCE)
Other partners > Martin-Luther-Universität Halle-Wittenberg - MLU (GERMANY)
Other partners > Sveriges lantbruksuniversitet - SLU (SWEDEN)
Other partners > Université de Bordeaux (FRANCE)
Other partners > Università degli Studi di Firenze (ITALY)
Other partners > Uniwersytet Warszawski - UW (POLAND)
Laboratory name:
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Deposited On:24 Oct 2016 08:18

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