Artikkelit kirjoittajalta Pekka Vilkamaa
Isovarpuisen rämeen ja sen metsäparannusmuuttumien maaperäeläimistö.
English title: Soil fauna in a virgin and two drained dwarf shrub pine bogs.
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Tekijä
The densities and biomasses of different soil invertebrate groups were investigated 1) in a dwarf shrub pine bog in its virgin state, 2) in a young (20 years) drainage area fertilized with NPK and 3) in an old (60 years) unfertilized drainage area of the same bog type. Monthly samples for nematodes, enchytraeids, micro-arthropods and macroarthropods were taken during the summers 1973 and 1974. The densities and biomasses of most animal groups
were significantly higher in the drained sites in comparison to the virgin site. The average total biomasses were 2,38 g/m2, 5,84 g/m2 and 4,92 g/m2 for the virgin bog, young drainage area and old drainage area, respectively. Oribatid mites and enchytraeid worms consisted of 70—80 % of the total biomass in all the sites, the former dominating in the virgin bog, the latter in the drainage areas.
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Vilkamaa,
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ei.tietoa@nn.oo
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