Suo - Mires and peat vol. 37 no. 5 | 1986
Mätäs- ja painanneturpeen happi- ja lämpötilaoloista Kikeperan suolla Lounais-Eestissä.
English title: Aeration and temperature conditions in hummock and depression peat in Kikepera bog, south-western Estonia.
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Aeration conditions in peat were studied in situ with the help of polycarbonate tubes filled with water and inserted into the soil at depths of 3—10, 13—20 and 28—35 cm. The study was carried out during the vegetation period 1986. Aeration conditions were more favourable in hummock peat, where the thickness of the better aerated layer was ca. 10 cm in June and September, and 20—30 cm in July and August. Aera-tion conditions in the upper 10 cm layer of depression peat only became favourable in July, while in deeper layers aeration conditions remained unfavourable. In September, after heavy rains, aeration conditions deteriorated in both hummock and depression peat. The oxygen content in mire water was higher in depression sites, which may be because of the inflow of surface water rich in oxygen. The temperature in the tubes was higher in upper layers of hummocks and deeper layers of depressions. In comparison with other sites (Filipendula forest type on gley soils, drained peat soils, hill pastures, pine forest on podzols), the aeration conditions in bog peat are considerably less favourable.
Key words: peat, bog, hummock-depression variation, aeration, oxygen.
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Zobel,
Department of Botany and Ecology, Tartu State University Tartu 202400, Estonian SSR
Sähköposti:
ei.tietoa@nn.oo
Sammalpallomenetelmä lyijysulaton päästöjen tutkimuksessa.
English title: Monitoring lead emissions with moss bags near a lead smelter in southern Finland.
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Moss (Sphagnum) bags were used to study the deposition of lead near a lead smelter in Vantaa, southern Finland, during 1983—1986. Pit-furnace and refining smelting were carried out. However, in March 1984 pit-furnace smelting ceased. The content of lead in moss bags increased clearly with decreasing distance from the source. The values were clearly smaller after the change in smelting process. Besides the moss bag method we also compared moss bags with other methods (deposition, suspended particles, snow sampling). There existed highly significant correlations between moss bag and other methods. The moss bag method enables a dense monitoring net and was found to be a rapid, easy and inexpensive way of monitoring the intensity and distribution of lead pollution.
Key words: lead, air pollution, monitoring, moss bags, Sphagnum.
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Vasander,
University of Helsinki, Department of Peatland Forestry, Unioninkatu 40 B, SF-00170 Helsinki, Finland
Sähköposti:
ei.tietoa@nn.oo
- Mikkola, Sähköposti: ei.tietoa@nn.oo
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