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Inventory

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2009/17
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Topic

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Number of stems of dead trees and shrubs (standing and lying) with a diameter at breast height (dbh) ≥12 cm.

Classification

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Length of lying dead trees and shrubs ≥12 cm in diameter at breast height (dbh) up to the limit for merchantable wood (7 cm in diameter) – in six classes. If an individual tree is broken, the lengths of all the parts are added together. Reference: Field Survey (MID 415: Stücklänge liegender Probebäume)
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region

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Demarcation of Switzerland used in NFI for protection forest analyses. The six protection forest regions were derived from the economic regions by combining individual regions according to natural and statistical criteria.
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evaluation area

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Forest that was less than two-thirds covered with shrubs in both NFI4 (2009-2017) and NFI5 (2018-2026) and is accessible on foot.
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grid

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Sub-grids 1, 2, 3, 4 and 5 of the field surveys on the sampling grid with a mesh size of 1.4 km (base grid).
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LFI4 2009/17
protection forest region
number of deadwood stems
length of lying dead tree (6 classes)
accessible forest without shrub forest NFI4/NFI5
1.4 km grid, subgrids 1-5
column total, %
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Citation

Abegg, M.; Ahles, P.; Allgaier Leuch, B.; Cioldi, F.; Didion, M.; Düggelin, C.; Fischer, C.; Herold, A.; Meile, R.; Rohner, B.; Rösler, E.; Speich, S.; Temperli, C.; Traub, B.,
2023: Swiss national forest inventory NFI. Result tables and maps of the NFI surveys 1983–2022 (NFI1, NFI2, NFI3, NFI4, NFI5.1–5) on the internet. [Published online 30.05.2023] Available from the World Wide Web <http://www.lfi.ch/resultate/> . Birmensdorf, Swiss Federal Research Institute WSL
https://doi.org/10.21258/1769925