Reference tables for the forest vegetation of Finland

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& 2. Abundances and frequencies of the 100 most common plant species in the understorey forest
vegetation of Finland in the years 1951-53, 1985-86 and 1995 are described in the Table 6.1 and
appendices 1-8 of the book. The results are given separately for the whole country, Southern and
Northern Finland as well as for sites on mineral soils and peatlands. The results are based on
vegetation data on c.a. 11 000 sample plots, sampled during the 3
rd National Forest Inventory
(NFI 3), vegetation data from a permanent network of 3000 sample plots, established in
connection with the 8th National Forest Inventory (NFI 8) in 1985-86 and its re-inventory in
Finland
The 3rd National Forest inventory in 1951-1953 was a line inventory. Sample plots were located
at 1 km intervals along the lines running in the SW – NE direction (Fig. 1) (Ilvessalo 1951). The
distance between adjacent lines varied, but it usually was 13 km in Southern Finland. In parts of
Häme, Vaasa and Åland areas the distance was halved. In Northern Finland the distance between
the lines was longer, 16-20 km. For various reasons, there remained many data gaps along the
lines.
A network of 3000 permanent sample plots was established in connection with the 8th National
Forest inventory in 1985-86 for monitoring nature and forest condition. The inventory was
repeated on the same plots in 1995 (Anon. 1986, 1995). The plots are located in clusters in a
systematic network, covering the whole country (Fig. 1). The distances between the clusters are
16 x 16 km in Southern Finland and 24 x 32 km in Northern Finland. Each cluster consists of 4
sample plots at a 400 m distance in Southern Finland and 3 sample plots at a 600 m distance in
Northern Finland.
In NFI 3 the aim was to establish the sample plots in homogenous tree stands, and the location of
the plot was moved, if it was on the border of two stands with different silvicultural treatments or
site types. In NFI 8 the sampling was totally systematic - the plot was never moved in any
circumstances, causing more heterogeneity within the sample plot

Data and Resources

Additional Info

Field	Value
Source	https://opendata.luke.fi/dataset/referencetablesforforestvegetation
Last Updated	February 1, 2022, 07:55 (UTC)
Created	January 25, 2022, 17:45 (UTC)
Access level	Public
Data timespan	First year: 1951. Last year: 1995.
Data update frequency	Static
Geographical area	Finland
Language	Finnish, English
Organization	LUKE - Natural Resources Institute Finland
Time interval	Samples from different decades, two year intervals from 1950's and 1980's and one year from 1990's.