Natural deadwood hosts more diverse pioneering wood‐inhabiting fungal communities than restored deadwood
Saine, S., Penttilä, R., Furneaux, B., Monkhouse, N., Zakharov, E. V., Ovaskainen, O., & Abrego, N. (2023). Natural deadwood hosts more diverse pioneering wood‐inhabiting fungal communities than restored deadwood. Restoration Ecology, Early View. https://doi.org/10.1111/rec.14056
Published inRestoration Ecology
© 2023 The Authors. Restoration Ecology published by Wiley Periodicals LLC on behalf of Society for Ecological Restoration
Deadwood can be recreated as a forest restoration measure to increase the amount of deadwood and assist deadwood-dependent biodiversity. While deadwood restoration is known to have an overall positive effect on associated species in the long term, it remains poorly understood how and when wood-inhabiting organisms colonize different kinds of deadwood, which is essential for developing efficient restoration frameworks. In this study, we use DNA metabarcoding to compare wood-inhabiting fungal communities between fresh naturally fallen spruce logs and spruce logs felled for restoration. The results show that although pioneering fungal community composition greatly differs between natural and felled logs, with natural logs hosting more species-rich and heterogeneous communities, felled logs still hold a relatively high fungal diversity. Responses to log type carried a strong phylogenetic signal, and orders Polyporales and Hymenochaetales including most species of conservation concern were more likely to occur in natural than in felled logs. Furthermore, we found that log type was more important for rarely recorded than commonly recorded taxa, suggesting that rare species might be more specialized in their habitat requirements than the common ones. Overall, while restored deadwood can hold a high fungal diversity, the results underline that freshly felled logs do not mimic fresh natural logs. Deadwood restoration should focus not only on increasing the quantity of deadwood but also on the quality of thereof, and most importantly, retaining the existing natural deadwood rather than artificially downing trees. ...
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Related funder(s)Research Council of Finland; European Commission
Funding program(s)Academy Research Fellow, AoF; Research costs of Academy Research Fellow, AoF; Research costs of Academy Professor, AoF; Research post as Academy Professor, AoF
The content of the publication reflects only the author’s view. The funder is not responsible for any use that may be made of the information it contains.
Additional information about fundingWe want to thank Metsähallitus, UPM and the city of Helsinki for providing the study sites. We are grateful for the invaluable work done by J. Pennanen and J. Johnson in the field, E. Takala and M. Kilpinen during sample pre-processing, and C. Whitmell and A. Thompson during lab work. We thank IT Center for Science, Finland for computational resources. We would also like to acknowledge A. Cirtwill, H. Wirta, and T. Fukami for their insightful comments on the earlier versions of the manuscript, and two anonymous reviewers, managing editor V. Amaral, and coordinating editor J. Robinson for their helpful feedback. The study was funded by University of Helsinki Research Foundation (S.S.), University of Helsinki 3-year grant program (N.A.), Natural Resources Institute Finland (R.P.), Academy of Finland (grant no. 342374 and 346492 to N.A., and 336212 and 345110 to O.O.) and the European Union: the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation pro-gram (grant agreement no. 856506 to O.O.; ERC-synergy project LIFEPLAN). ...
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