Artikkelit jotka sisältää sanan 'endangered species'
Lapin kolmion lettoisista soista.
English title: The rich fens of the Lapland triangle region.
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The Lapland triangle region, located between the lower courses of the rivers Tornion-joki and Kemijoki in NW-Finland covers an area of 3500 km2. The region is renowed for its concentration of rich fen mire site types, including Campylium stellatum — Limprichtia intermedia — rich fens, eutrophic flark fens, eutrophic birch fens, eutrophic pine mires and eutrophic spruce mires. Peatlands cover about 60 % of the total land area of the region. By the end of the 1970's some 90 % of the area of rich fens had been drained and utilized for cultivation and forestry purposes and several plant species had become endangered. Although some 20 sites have been listed for conservation, enforcement so far has been very limited.
Keywords: fens, peatland drainage, endangered species, conservation.
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Ylimartimo,
Department of Silviculture, University of Helsinki, Unioninkatu 40 B, SF-00I70, Finland
Sähköposti:
ei.tietoa@nn.oo
Putkilokasvien esiintyminen soidensuojeluohjelmassa esitetyillä alueilla Etelä- ja Keski-Suomessa.
English title: Vascular plant species in planned mire conservation areas in southern and central Finland.
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The occurrence of the threatened and endangered vascular mire plant species was inventoried in the mire conservation areas in Finland. The survey was based on 246 sample plots (0.5 km × 0.5 km) randomly chosen in the Finnish mire conservation areas planned in 1981 in southern and central Finland. In the inventory, 243 vascular plant species and 2 hybrids were found in bog mires and 249 species and 10 hybrids were found in the southern aapa mires. The majority of the found mire plant species commonly occur on mires in Finland. In this survey, out of 18 threatened primary mire vascular plant species occurring in Finland, only three species (Carex heleonastes L. f., Dactylorhiza incarnata ssp. cruenta (O. F. Mull.) P. D. Sell, D. cruenta (O. F. Mull.) Verm, Orchis cruenta (O. F. Mull.) and Dactylorhiza traunsteineri) (Saut. ex Rchb.) Soo´, Orchis traunsteineri Saut. ex Rchb., Dactylorchis traunsteineri (Saut. ex Rchb.) Verm.; incl. Dactylorhiza curvifolia (F. Nyl.) Czerep.; incl. D russowii (Klinge) Holub and only one so called secondary mire plant species (Carex paniculata L.) were found in the sample plots. The found species occurred only on six mire conservation areas. Compared to the size of the material, the percentage of findings of threatened vascular plant species was remarkably low. It can be concluded that the complementary programs of the mire conservation in Finland have been important to protect the threatened vascular mire plants.
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Hanhela,
Oulu University of Applied Sciences, School of Renewable Natural Resources, Metsäkouluntie, FI-90650 Oulu
Sähköposti:
ei.tietoa@nn.oo
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