Artikkelit jotka sisältää sanan 'revegetation'
Nursing plants in peatland restoration: on their potential use to alleviate frost heaving problems.
Avainsanat:
Sphagnum;
revegetation;
regeneration;
rehabilitation;
colonisation;
degraded mire;
peat erosion
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Peatland restoration measures usually require the rewetting of the disturbed ecosystem. In northern latitudes, the increase in wetness of the bare peat substrate causes frost heaving. In this paper, we described the problem of frost heaving in cutover peatlands and an array of means whereby it can be diminished. Several avenues of research should be pursued with the use of nursing plants to reduce frost heaving and promote Sphagnum establishment and growth. For large scale restoration of peatland ecosystems, Polytrichum strictum appears to be a good potential nursing plant to Sphagnum. However the importance of competition between polytric and Sphagnum is unknown and we do not know under which conditions the association is beneficial or not.
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Groeneveld,
Groupe Recherche en Écologie des Tourbières and Centre d'Études Nordiques, Pavillon Paul-Comtois, Université Laval, Québec, Canada
Sähköposti:
ei.tietoa@nn.oo
- Rochefort, Sähköposti: ei.tietoa@nn.oo
Kasvillisuuden uusiutumisesta turvetuotantoa varten raivatulla alueella Ähtärin Mustasuolla.
English title: Revegetation of an area of Mustasuo-mire after clearing for peat harvesting.
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The structure of the vegetation in an area abandoned 13 years ago after clearing for fuel peat production was investigated in Ähtäri, Finland. The vegetation consisted of 13 plant species, all of which were typical bog-species. The average above ground dry weight biomass for the whole vegetation was 240 g/m2. The proportions of the total biomass for the shrub layer, field layer and ground layer were 46 %, 38 % and 16 %, respectively. In the field layer 78 % of the total biomass was formed by woody species. Polytrichum strictum formed 99,6 % of the total biomass of the ground layer. Revegetation had occurred unevenly; large openings with no plant cover were found, especially in the middle of the strips.
Keywords: peat harvesting, revegetation, vegetation structure
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Salonen,
University of Jyväskylä, Department of Biology, Yliopistonkatu 9, SF-40100 Jyväskylä, Finland
Sähköposti:
ei.tietoa@nn.oo
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