Mapping the probability of forest snow disturbances in Finland

PLoS One. 2021 Jul 29;16(7):e0254876. doi: 10.1371/journal.pone.0254876. eCollection 2021.

Abstract

The changing forest disturbance regimes emphasize the need for improved damage risk information. Here, our aim was to (1) improve the current understanding of snow damage risks by assessing the importance of abiotic factors, particularly the modelled snow load on trees, versus forest properties in predicting the probability of snow damage, (2) produce a snow damage probability map for Finland. We also compared the results for winters with typical snow load conditions and a winter with exceptionally heavy snow loads. To do this, we used damage observations from the Finnish national forest inventory (NFI) to create a statistical snow damage occurrence model, spatial data layers from different sources to use the model to predict the damage probability for the whole country in 16 x 16 m resolution. Snow damage reports from forest owners were used for testing the final map. Our results showed that best results were obtained when both abiotic and forest variables were included in the model. However, in the case of the high snow load winter, the model with only abiotic predictors performed nearly as well as the full model and the ability of the models to identify the snow damaged stands was higher than in other years. The results showed patterns of forest adaptation to high snow loads, as spruce stands in the north were less susceptible to damage than in southern areas and long-term snow load reduced the damage probability. The model and the derived wall-to-wall map were able to discriminate damage from no-damage cases on a good level (AUC > 0.7). The damage probability mapping approach identifies the drivers of snow disturbances across forest landscapes and can be used to spatially estimate the current and future disturbance probabilities in forests, informing practical forestry and decision-making and supporting the adaptation to the changing disturbance regimes.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Climate Change
  • Finland
  • Forests*
  • Seasons
  • Snow*

Grants and funding

The research was funded from the project SÄÄTYÖ funded by the Ministry of Agriculture and Forestry of Finland. This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 895158. The contribution of Mikko Peltoniemi on the research was also funded through the BiodivClim ERANet Cofund (joint BiodivERsA Call on “Biodiversity and Climate Change”, 2019-2020) with national co–funding through Academy of Finland (decision no. 344722), ANR (France, project ANR-20-EBI5-0005-03), and Federal Ministry of Education and Research (Germany, grant no. 16LC2021A). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.