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Environmental drivers of ectomycorrhizal communities in Europe's temperate oak forests

Research output: Contribution to journalA1: Web of Science-articleResearchpeer-review

Authors

  • Laura M Suz
  • Nadia Barsoum
  • Sue Benham
  • Hans Peter Dietrich
  • Karl Dieter Fetzer
  • Richard Fischer
  • Paloma Garcia
  • Joachim Gehrman
  • Ferdinand Kristöfel
  • Miklos Manninger
  • Stefan Neagu
  • Manuel Nicolas
  • Jan Oldenburger
  • Stephan Raspe
  • Gerardo Sanchez
  • Hans Werner Schröck
  • Andrea Schubert
  • Kris Verheyen
  • Martin I Bidartondo

External Organisations

  • Royal Botanic Gardens, Kew
  • Forest Research
  • Bavarian State Institute of Forestry
  • Fachbereichsleiter Bodenschutz und Waldökologie
  • Thünen Institute for World Forestry
  • Ministerio de Agricultura, Alimentación y Medio Ambiente
  • Landesamt für Natur, Umwelt und Verbraucherschutz NRW
  • Federal Research and Training Centre for Forests, Natural Hazards and Landscape
  • Forest Research Institute
  • Forest Research and Management Institute (ICAS)
  • Office National des Forêts (RENECOFOR)
  • Stichting Probos
  • Forschungsanstalt für Waldökologie und Forstwirtschaft Rheinland-Pfalz
  • Universiteit Gent

Details

Original languageEnglish
JournalMolecular Ecology
Volume23 (22)
Pages (from-to)5628-5644
Number of pages17
ISSN0962-1083
Publication statusPublished - 26-Sep-2014

Abstract

Ectomycorrhizal fungi are major ecological players in temperate forests, but they are rarely used in measures of forest condition because large-scale, high-resolution, standardized and replicated belowground data are scarce. We carried out an analysis of ectomycorrhizas at 22 intensively monitored long-term oak plots, across nine European countries, covering complex natural and anthropogenic environmental gradients. We found that at large scales, mycorrhizal richness and evenness declined with decreasing soil pH and root density, and with increasing atmospheric nitrogen deposition. Shifts in mycorrhizas with different functional traits were detected; mycorrhizas with structures specialized for long-distance transport related differently to most environmental variables than those without. The dominant oak-specialist Lactarius quietus, with limited soil exploration abilities, responds positively to increasing nitrogen inputs and decreasing pH. In contrast, Tricholoma, Cortinarius and Piloderma species, with medium-distance soil exploration abilities, show a consistently negative response. We also determined nitrogen critical loads for moderate (9.5–13.5 kg N/ha/year) and drastic (17 kg N/ha/year) changes in belowground mycorrhizal root communities in temperate oak forests. Overall, we generated the first baseline data for ectomycorrhizal fungi in the oak forests sampled, identified nitrogen pollution as one of their major drivers at large scales and revealed fungi that individually and/or in combination with others can be used as belowground indicators of environmental characteristics.
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