Relative contributions of set-asides and tree retention to the long-term availability of key forest biodiversity structures at the landscape scale

Journal of Environmental Management
Jean-Michel RobergeAnnika Nordin

Abstract

Over previous decades new environmental measures have been implemented in forestry. In Fennoscandia, forest management practices were modified to set aside conservation areas and to retain trees at final felling. In this study we simulated the long-term effects of set-aside establishment and tree retention practices on the future availability of large trees and dead wood, two forest structures of documented importance to biodiversity conservation. Using a forest decision support system (Heureka), we projected the amounts of these structures over 200 years in two managed north Swedish landscapes, under management scenarios with and without set-asides and tree retention. In line with common best practice, we simulated set-asides covering 5% of the productive area with priority to older stands, as well as ∼5% green-tree retention (solitary trees and forest patches) including high-stump creation at final felling. We found that only tree retention contributed to substantial increases in the future density of large (DBH ≥35 cm) deciduous trees, while both measures made significant contributions to the availability of large conifers. It took more than half a century to observe stronger increases in the densities of large deciduous tre...Continue Reading

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Citations

Apr 4, 2017·Ecological Applications : a Publication of the Ecological Society of America·Louise MairTord Snäll
Jun 22, 2017·Journal of Environmental Management·Francesca SantanielloJohan Sonesson

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