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Inventory

(12)
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2009/17
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Topic

(12)
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Sum of the stem cross-sectional areas at a height of 1.3 m (level for measuring diameter at breast height [dbh]) of all living and dead trees and shrubs (standing and lying) with a dbh ≥12 cm. The total basal area corresponds to the sum of the basal area and the deadwood basal area.
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Classification

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Areas in higher and lower altitude zones classified according to the system used for altitudinal vegetation belts in the guidelines for monitoring the sustainability and performance of protection forests (NaiS; Frehner et al. 2005). The boundary between the higher and lower altitudes runs between the «upper montane» and «lower montane» levels on the Northern Alps and between the «high montane» and «upper/lower montane» levels to the Southern Alps. The information is based on the altitudinal vegetation belts determined by experts (accessible forest sample plots of NFI4 on the 1.4-km network; Arge Frehner et al. 2020), as well as on the altitudinal vegetation belts modelled for the period 1981-2010 (other sample plots; Zischg et al. 2021).
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region

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Demarcation of Switzerland into five regions (Jura, Plateau, Pre-Alps, Alps and Southern Alps) with relatively uniform growth and timber production conditions. The production regions were established by the Federal Office of Forestry long before the first National Forest Inventory (NFI1, 1983-1985). With a small exception along Lake Geneva, the boundaries of the production regions still follow the municipal boundaries of the time. Unlike the NFI, the Forestry Statistics of the Federal Statistical Office don't use the production regions as demarcation but rather the forestry zones, whose boundaries are somewhat different.
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evaluation area

(4)
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Forest of which less than two-thirds is covered with shrubs that can be accessed on foot.
(4)
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Forest that was less than two-thirds covered with shrubs in the five inventories NFI1 (1983-1985), NFI2 (1993-1995), NFI3 (2004-2006), NFI4 (2009-2017) and NFI5 (2018-2026) and was accessible on foot.
(4)
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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.

grid

(8)
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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).
(4)
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NFI's sampling grid with a mesh size of 1.4 km. The 1.4-km grid is the grid size covering all the previous terrestrial Inventories, which is why it is also called the base grid.
search result: 12 entries on 1 page
LFI4 2009/17
production region
total basal area
higher/lower altitude zone
accessible forest without shrub forest
1.4-km grid
LFI4 2009/17
production region
total basal area
higher/lower altitude zone
accessible forest without shrub forest NFI1-NFI5
1.4 km grid, subgrids 1-5
LFI4 2009/17
production region
total basal area
higher/lower altitude zone
accessible forest without shrub forest NFI4/NFI5
1.4 km grid, subgrids 1-5
LFI4 2009/17
production region
total basal area
conifers and broadleaves·higher/lower altitude zone
accessible forest without shrub forest
1.4-km grid
LFI4 2009/17
production region
total basal area
conifers and broadleaves·higher/lower altitude zone
accessible forest without shrub forest NFI1-NFI5
1.4 km grid, subgrids 1-5
LFI4 2009/17
production region
total basal area
conifers and broadleaves·higher/lower altitude zone
accessible forest without shrub forest NFI4/NFI5
1.4 km grid, subgrids 1-5
LFI4 2009/17
production region
total basal area
higher/lower altitude zone·conifers and broadleaves
accessible forest without shrub forest
1.4-km grid
LFI4 2009/17
production region
total basal area
higher/lower altitude zone·conifers and broadleaves
accessible forest without shrub forest NFI1-NFI5
1.4 km grid, subgrids 1-5
LFI4 2009/17
production region
total basal area
higher/lower altitude zone·conifers and broadleaves
accessible forest without shrub forest NFI4/NFI5
1.4 km grid, subgrids 1-5
LFI4 2009/17
production region
total basal area
higher/lower altitude zone·main tree species
accessible forest without shrub forest
1.4-km grid
LFI4 2009/17
production region
total basal area
higher/lower altitude zone·main tree species
accessible forest without shrub forest NFI1-NFI5
1.4 km grid, subgrids 1-5
LFI4 2009/17
production region
total basal area
higher/lower altitude zone·main tree species
accessible forest without shrub forest NFI4/NFI5
1.4 km grid, subgrids 1-5
search result: 12 entries on 1 page

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