Suo - Mires and peat vol. 36 no. 1 | 1985
Uhanalaiset suoputkilokasvilajit Luopioisten Kurkisuon kasvillisuudessa.
English title: Endangered mire vascular plant species in the vegetation of the Kurkisuo-mire in southern Finland.
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The main purpose of this paper is to discuss which plant species are endangered in the present mire vegeration in southern Finland. The work was realized using a 155 ha large, widely variable area of mire as an example. We compared the number of observed species in different abundance and distribution (frequency) classes and tried to identify the essential properties to describe a typical endangered species with the aid of three different niche characteristics: 1. trophic status, 2. depth to water table, and 3. mire margin — mire expanse -effect. For indicator values we have consulted earlier ecological literature. If we reject upland forest species, which accidentally appear in the mirevegetation, only species with a local scarce distribution were interpreted as endangered. The list of endangered species was broadly similar to earlier, subjectively composed lists. Most of the endangered plant species were associated with mesotrop-hic sites, on lawn or flark levels and with a mire expanse -effect.
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Kuitunen,
Sähköposti:
ei.tietoa@nn.oo
- Kuitunen, Sähköposti: ei.tietoa@nn.oo
Saraturpeen ja timotein kivennäisainepitoisuudet Suomessa.
English title: Mineral element contents of Carex peat soils and Timothy grass (Phleum pratense) in Finland.
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The lay crop production of Carex peat soils in northern Finland seem to have decreased during the last ten years. The same is not true for southern Finland or any other soil type.
The data from 2000 soil and Timothy grass samples, collected by Finnish Academy (1974), has been reworked in order to establish any differences between southern and northern Finland. The data consists of easily soluble contents of Ca, K, P, Mg, Mn, Fe, Zn, Cu, Mo, Na, Ni, Cr, Sr, Al and Pb.
There was a clear increase in the content of many mineral elements towards the north in moraine and coarser fine sand and especially in Timothy grass contents. In contrast, 2/3 of the mineral element contents in Carex peat soils decreased northwards even though contents in Timothy grass increased.
Timothy grass seems able to take up more mineral elements when growing in the long days of northern latitudes than in short days of the south. This effect is most marked in the case of Carex peat soils. Mineral element availability in Carex peat soils in North Finland therefore deserves further research.
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Soini,
Sähköposti:
ei.tietoa@nn.oo
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