University of Oulu

Tolvanen, A., Tarvainen, O. and Laine, A.M. (2020), Soil and water nutrients in stem‐only and whole‐tree harvest treatments in restored boreal peatlands. Restor Ecol, 28: 1357-1364. https://doi.org/10.1111/rec.13261

Soil and water nutrients in stem‐only and whole‐tree harvest treatments in restored boreal peatlands

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Author: Tolvanen, Anne1; Tarvainen, Oili1; Laine, Anna M.2
Organizations: 1Natural Resources Institute Finland (Luke), Paavo Havaksen tie 3, FI-90014 Oulu, Finland
2Department of Ecology and Genetics, University of Oulu, P.O. Box 3000, FI-90014 Oulu, Finland
Format: article
Version: accepted version
Access: embargoed
Persistent link: http://urn.fi/urn:nbn:fi-fe202102013367
Language: English
Published: John Wiley & Sons, 2020
Publish Date: 2021-08-05
Description:

Abstract

In boreal peatlands felling and tree harvest are commonly carried out as part of peatland restoration. Stem‐only harvest is the principal harvest method and it leaves the live crown material (felling residue) containing most tree nutrients at the site. Whole‐tree harvest, where felling residue is removed, is not favored due to higher transport costs, although it might better promote the recovery of nutrient‐poor peatlands towards pristine conditions. We investigated whether initial differences in N mineralization and decomposition rates observed between tree harvest methods continued out to 6 years after restoration and whether the spatial variation in water table (WT) level and water nutrient concentrations parallels with the observed pattern in mineralization and decomposition rates. The study was done at 15 peatland sites in Natura 2000 protection areas in Finland during 2007–2013. Concentration of ammonium in soil water was higher in the stem‐only harvest treatment compared to that of the whole‐tree harvest treatment, whereas the previously observed differences in net N mineralization and decomposition rates had leveled out by the sixth year after restoration. The spatial variation created by the ditch network still affected the hydrology and peatland functions so that the nutrient concentrations were higher near ditches than in other locations, implying potential risk for nutrient leaching. Based on this study, there is no reason to prefer either harvest method over the other in nutrient‐poor drained peatlands with low tree volumes, which constitute the majority of available peatland restoration area in Finland.

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Series: Restoration ecology
ISSN: 1061-2971
ISSN-E: 1526-100X
ISSN-L: 1061-2971
Volume: 28
Issue: 6
Pages: 1357 - 1364
DOI: 10.1111/rec.13261
OADOI: https://oadoi.org/10.1111/rec.13261
Type of Publication: A1 Journal article – refereed
Field of Science: 1181 Ecology, evolutionary biology
Subjects:
Funding: Restoration was carried out as part of the Green Belt LIFE project (LIFE04NAT/FI/000078). Financial support from the Finnish Forest Research Institute, Natural Resource Institute Finland, and University of Oulu is acknowledged.
Copyright information: © 2020 Society for Ecological Restoration. This is the peer reviewed version of the following article: Tolvanen, A., Tarvainen, O. and Laine, A.M. (2020), Soil and water nutrients in stem‐only and whole‐tree harvest treatments in restored boreal peatlands. Restor Ecol, 28: 1357-1364, which has been published in final form at https://doi.org/10.1111/rec.13261. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.