Report - ICP Forests

70 3. Intensive Monitoring
Country Number of plots
Slovenia 11
Spain 53
Sweden 98
Switzerland 16
United Kingdom 10
SUM 776
Table 3.4.1-2: Number of relevés per plot
Number of relevés Number of plots
1 378
2 159
3 150
4 37
5 13
6 11
7 17
8 11
SUM 776
Table 3.4.1-3: Interval between the first and last relevé per plot
Interval (years) Number of plots
0 378
1 24
2 10
3 20
4 33
5 104
6 24
7 50
8 5
9 5
10 94
11 29
SUM 776
3.4.2 Material and Methods
Species
All species were used as given in the database with the following exceptions:
- 'extra' species added by the individual countries were removed;
- all Rubus species with the exception of R. idaeus, R. caesius, R. saxatilis, R. chamaemorus and
R. arcticus were taken together as R. fruticosus;
- all Alchemilla species except A. alpina were taken together as A. vulgaris.
The numerical codes used in the database were converted into eight-digit codes following the
Dutch 'Biobase' database (Van Duuren et al. 2003) as far as possible. New codes were generated
for species not in Biobase and manually adapted if necessary to achieve unicity. The
correspondence of the Ellenberg database (Ellenberg 1991) and the ICP database was checked
on the level of the full species names; codes were adapted if necessary. Annex 3.4.1 gives a full
list of all species and their codes used in this project.