Data-set 2:

All forest land in Koillismaa, Northern Finland

Sampling frame: All forest land in the municipalities of Taivalkoski, Kuusamo or Posio were included in the sampling.

Field methods: 100 hectare study quadrates. In the first study site, the included study plot was larger than normally, 1 ha, and it was formed of four subplots of 0.25 hectares.

Selection of study plots: Random sampling in the area covering municapilities of Taivalkoski, Kuusamo and Posio. First 10 x 10 km squares, delimited by gridlines of the national uniform grid system (Grid 27 E; Heikinheimo & Raatikainen 1981), were randomly selected (the same squares were also used for sampling in the data sets 1 and 3). Study quadrates were placed systematically in the middle of each square (coordinates xxx4:xx4).

Amount of data: Five independent study quadrates, each including one 0.5 - 1 hectare study plot (total 3 hectares). If the "additional" 0.5 hectare area is excluded, the remaining five 0.5 ha sample plots include 461 dead trees, of which 194 were more than 10 cm thick. In addition, tree- and dead tree- and biotope data were collected along altogether six kilometers of sampling lines (total area 6 ha).

Species included in the study: All wood inhabiting polypores and some other wood inhabiting fungi, see a list of target species.

Field workers: Mariko Lindgren. Jarmo Pyykkö assisted on one study plot.

Time and duration of field work: Summer 1995. Altogether five days.

Funding: Field work was funded by the Finnish Forest and Park Service. This financing covered materials, and salary and travell expences for Lindgren.

Areas selected (sampled) for the study:
Taivalkoski: