Target-tailored forest damage inventory (TFDI)

	Fieldwork in the TFDI. Photographer: Sören Wulff

Target-tailored forest damage inventories (TFDI) aiming at providing data for operational decision making at local level and linked to specific damage events, are undertaken at the Swedish University of Agricultural Sciences.

An annual monitoring of the most important sources of forest damage is carried out in the Swedish National Forest inventory (NFI). The Swedish NFI contributes data to the European cooperation programme ICP Forests.

Although the Swedish NFI is an objective and uniform inventory of forest damage in Swedish forests at international, national and regional scales, less common or less widespread occurrences of forests pests and pathogens are difficult to survey solely through large-scale monitoring programmes. There is a need for complementary tailored inventories to facilitate timely delivery of relevant information. TDFIs are developed to give a rapid response to requested information on specific damage. The TDFIs are carried out in limited and concentrated samples, with flexible but robust methods and design.