Protection forests and biodiversity conservation: synergies and trade-offs
This project aims to identify synergies and trade-offs between biodiversity conservation and protection against natural hazards in Swiss forests. It will assess the potential of protection forests for the conservation of biodiversity.
Fiche signalétique
- Départements participants Haute école des sciences agronomiques, forestières et alimentaires
- Institut(s) Gestion multifonctionnelle des forêts
- Unité(s) de recherche Écosystème forestier et gestion
- Organisation d'encouragement FNS
- Durée (prévue) 01.10.2025 - 31.12.2029
- Direction du projet Prof. Dr. Thibault Lachat
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Équipe du projet
Prof. Dr. Thibault Lachat
Prof. Dr. Luuk Dorren
Dr. Christine Moos
Prof. Dr. Massimiliano Schwarz -
Partenaire
Schweizerische Vogelwarte
Bundesamt für Umwelt BAFU
WSL-Institut für Schnee- und Lawinenforschung SLF
SBB AG - Mots-clés Saproxylic species, Heliophilous species, Old-growth forests, Natural hazards, Biodiversity conservation, Forest management, Simulation models
Situation
Protection forests account for 49% of Swiss forests, reaching over 80% of forests in mountainous regions. These forests are managed according to the so-called NaiS guidelines, which define the requirements for the sustainable provision of the protective service against natural hazards. However, managing protection forests can sometimes conflict with biodiversity conservation, as it tends to minimize early and late forest development stages, which are recognizes as biodiversity hotspots in temperate forest ecosystems. This project wants to investigate to which extent "old-growth" forest structures, such as larger quantities of dead wood or older habitat trees, can be integrated in protection forests without substantially impairing their protective effect. To achieve this, the relationships, potential-trade-offs, and synergies between protective effects, forest structures and biodiversity across different successional stages and management regimes will be assessed and quantified.
Approche
To identify synergies and trade-offs between biodiversity conservation and forest protection measures in Swiss forests, 90 study sites in protection forests representing three natural hazard processes (avalanches, rockfall, and shallow landslide) will be selected and assessed. On each study site an inventory of the species including insects, birds, bats and mycorrhizal fungi will be carried out. Furthermore, an inventory of forest structures including DBH measurements, identifying tree species and their tree-related microhabitats, and a detailed inventory of lying and standing dead trees. Furthermore, there will be a quantification of the protective effects against the corresponding natural hazard on each site. All this data is then used to identify drivers on biodiversity and relationships with protective effects.
Perspectives
The project's outcomes will inform changes in protection forest management and biodiversity conservation by the Swiss Federal Railways (SBB) and the NaiS guidelines. In the long term this project aims to enhance biodiversity and resilience in Swiss forests.
