Regionally optimized forest management under changing climate |
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Authors: | T Nuutinen J Matala H Hirvelä K Härkönen H Peltola H Väisänen S Kellomäki |
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Institution: | (1) Finnish Forest Research Institute, P.O. Box 68, FI-80101 Joensuu, Finland;(2) Faculty of Forestry, University of Joensuu, P.O. Box 111, FI-80101 Joensuu, Finland;(3) Finnish Forest Research Institute, Unioninkatu 40 A, FI-00170 Helsinki, Finland |
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Abstract: | The purpose of this study was to optimize forest management for a forest region (the total area of forest and scrub land 1.54
mill. ha) under changing climate by using the large-scale forestry scenario model MELA and sample plot data from the geo-referenced
National Forest Inventory (NFI). The MELA model is based on integrated simulation and optimisation; in the simulation it utilises
empirical tree-level models into which the impacts of climate change were introduced by transfer variables derived by using
the physiological model FinnFor. Six scenarios with differences in climate and forest management were defined. In simulations,
the accelerating tree growth caused by climate change resulted in an increase in maximum sustainable removal of trees at regional
level. Changes in regionally optimized forest management were also detected during the analysis period of 30 years; the proportion
of thinnings increased because the stands fulfilled the thinning requirements earlier than in the current climate. This study
was the first attempt to solve endogenously maximum sustainable timber production and corresponding forest management at the
regional level under different climate scenarios. When implemented in the MELA system, which is widely used in Finnish forestry,
the transfer variables offer means of disseminating the results from physiological studies to planning of adjustment and mitigation
measures under changing climate. |
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