Increasing N deposition impacts neither diversity nor functions of deadwood‐inhabiting fungal communities,but adaptation and functional redundancy ensure ecosystem function |
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| Authors: | Witoon Purahong Tesfaye Wubet Tiemo Kahl Tobias Arnstadt Björn Hoppe Guillaume Lentendu Kristin Baber Tyler Rose Harald Kellner Martin Hofrichter Jürgen Bauhus Dirk Krüger François Buscot |
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| Institution: | 1. Department of Soil Ecology, UFZ‐Helmholtz Centre for Environmental Research, Theodor‐Lieser‐Str. 4, Halle (Saale), Germany;2. German Centre for Integrative Biodiversity Research (iDiv), Halle‐Jena‐Leipzig, Deutscher Platz 5e, Leipzig, Germany;3. University of Freiburg, Faculty of Environment and Natural Resources, Chair of Silviculture, Tennenbacherstr. 4, Freiburg im Breisgau, Germany;4. Biosphere Reserve Vessertal‐Thuringian Forest, Brunnenstr. 1, Schmiedefeld am Rennsteig, Germany;5. Technische Universit?t Dresden – International Institute (IHI) Zittau, Department of Bio‐ and Environmental Sciences, Markt 23, Zittau, Germany;6. Julius Kühn‐Institute – Federal Research Centre for Cultivated Plants, Institute for National and International Plant Health, Messeweg 11/12, Braunschweig, Germany;7. Department of Ecology, University of Kaiserslautern, Erwin‐Schr?dinger‐Stra?e, Kaiserslautern, Germany;8. Department of Systematic Botany and Functional Biodiversity, University of Leipzig, Institute of Biology Johannisallee 21‐23, Leipzig, Germany |
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| Abstract: | Nitrogen deposition can strongly affect biodiversity, but its specific effects on terrestrial microbial communities and their roles for ecosystem functions and processes are still unclear. Here, we investigated the impacts of N deposition on wood‐inhabiting fungi (WIF) and their related ecological functions and processes in a highly N‐limited deadwood habitat. Based on high‐throughput sequencing, enzymatic activity assay and measurements of wood decomposition rates, we show that N addition has no significant effect on the overall WIF community composition or on related ecosystem functions and processes in this habitat. Nevertheless, we detected several switches in presence/absence (gain/loss) of wood‐inhabiting fungal OTUs due to the effect of N addition. The responses of WIF differed from previous studies carried out with fungi living in soil and leaf‐litter, which represent less N‐limited fungal habitats. Our results suggest that adaptation at different levels of organization and functional redundancy may explain this buffered response and the resistant microbial‐mediated ecosystem function and processes against N deposition in highly N‐limited habitats. |
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