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The crown condition of Norway spruce and occurrence of symptoms caused by Armillaria spp. in mixed stands

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  • Petr Čermák
  • Tomáš Žid

    (Department of Forest Protection and Wildlife Management, Faculty of Forestry and Wood Technology, Mendel University in Brno, Brno, Czech Republic)

Abstract

Mixed stands are currently supported as effective management options to reduce forest vulnerability to climate change. However, our issues about benefits of mixtures, mechanisms of their incidence and conditions for their effectiveness have yet been only partly clarified. We assessed the crown condition of Norway spruce (Picea abies /L./ Karst) and occurrence of symptoms caused by Armillaria spp. on spruce in a small area in the Drahanská vrchovina Highlands (Czech Republic) in differently mixed stands in 2002 and 2019. We found that although the broadleaf abundance affected the total defoliation of Norway spruce, the effect was unstable in time. The observed effect of altitudinal zones and Norway spruce abundance on the occurrence of symptoms of Armillaria root rot in spruce was also unstable. The drought during recent four years and the implemented forestry measures (salvage and intermediate felling) can be reasons for the relationship instability. We did not identify any statistically significant relationship between tree species diversity (Simpson's Index) and defoliation.

Suggested Citation

  • Petr Čermák & Tomáš Žid, 2020. "The crown condition of Norway spruce and occurrence of symptoms caused by Armillaria spp. in mixed stands," Journal of Forest Science, Czech Academy of Agricultural Sciences, vol. 66(12), pages 483-491.
    • Handle: RePEc:caa:jnljfs:v:66:y:2020:i:12:id:86-2020-jfs
    DOI: 10.17221/86/2020-JFS
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    References listed on IDEAS

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    1. Ingrid M. Parker & Megan Saunders & Megan Bontrager & Andrew P. Weitz & Rebecca Hendricks & Roger Magarey & Karl Suiter & Gregory S. Gilbert, 2015. "Phylogenetic structure and host abundance drive disease pressure in communities," Nature, Nature, vol. 520(7548), pages 542-544, April.
    2. Stephan Kambach & Ingolf Kühn & Bastien Castagneyrol & Helge Bruelheide, 2016. "The Impact of Tree Diversity on Different Aspects of Insect Herbivory along a Global Temperature Gradient - A Meta-Analysis," PLOS ONE, Public Library of Science, vol. 11(11), pages 1-14, November.
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