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Research article - Peer-reviewed, 2020

Stand-level mortality models for Nordic boreal forests

Siipilehto, Jouni; Allen, Micky; Nilsson, Urban; Brunner, Andreas; Huuskonen, Saija; Haikarainen, Soili; Subramanian, Narayanan; Anton-Fernandez, Clara; Holmstrom, Emma; Andreassen, Kjell; Hynynen, Jari

Abstract

New mortality models were developed for the purpose of improving long-term growth and yield simulations in Finland, Norway, and Sweden and were based on permanent national forest inventory plots from Sweden and Norway. Mortality was modelled in two steps. The first model predicts the probability of survival, while the second model predicts the proportion of basal area in surviving trees for plots where mortality has occurred. In both models, the logistic function was used. The models incorporate the variation in prediction period length and in plot size. Validation of both models indicated unbiased mortality rates with respect to various stand characteristics such as stand density, average tree diameter, stand age, and the proportion of different tree species, Scots pine (Pinus sylvestris L.), Norway spruce (Picea abies (L.) Karst.), and broadleaves. When testing against an independent dataset of unmanaged spruce-dominated stands in Finland, the models provided unbiased prediction with respect to stand age.

Keywords

Norway spruce; Scots pine; broadleaved species; logistic function; period length; plot size; simulation

Published in

Silva Fennica
2020, volume: 54, number: 5, article number: 10414
Publisher: FINNISH SOC FOREST SCIENCE-NATURAL RESOURCES INST FINLAND

Authors' information

Siipilehto, Jouni
Natural Resources Institute Finland (Luke)
Allen , Micky
Norwegian Institute of Bioeconomy Research (NIBIO)
Swedish University of Agricultural Sciences, Southern Swedish Forest Research Centre
Brunner, Andreas
Norwegian University of Life Sciences
Huuskonen, Saija
Natural Resources Institute Finland (Luke)
Haikarainen, Soili
Natural Resources Institute Finland (Luke)
Swedish University of Agricultural Sciences, Southern Swedish Forest Research Centre
Antón-Fernández, Clara
Norwegian Institute of Bioeconomy Research (NIBIO)
Swedish University of Agricultural Sciences, Southern Swedish Forest Research Centre
Hynynen, Jari
Natural Resources Institute Finland (Luke)
Andreassen, Kjell
Norwegian Institute of Bioeconomy Research (NIBIO)

UKÄ Subject classification

Forest Science

Publication Identifiers

DOI: https://doi.org/10.14214/sf.10414

URI (permanent link to this page)

https://res.slu.se/id/publ/110043