10 Result(s)
within
English
Geology
Tommi Kauppila
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Article
Open AccessProperties and Stability of Mining-Induced Meromixis in Two Small Boreal Lakes in Eastern Finland
Mine waters are a significant point source stressor for aquatic environments, not only due to their acidity and high metal concentrations, but also because of their high electrolyte concentrations. Ion-rich mi...
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Article
Eutrophication histories of three contrasting lakes in a naturally nutrient-rich boreal watercourse
The Iisalmi Route watercourse in central-eastern Finland contains a number of highly eutrophic lakes. Despite substantial impacts from anthropogenic activity, the region appears to be naturally eutrophic becau...
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Article
Explosives-originated nitrogen emissions from dimension stone quarrying in Varpaisjärvi, Finland
As the emissions of nitrogen (N) compounds from mining areas can have detrimental effects on the aquatic environment through eutrophication, oxygen deficiency or direct toxicity, the management and mitigation ...
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Article
Effects of mining on testate amoebae in a Finnish lake
Sediment geochemistry and testate amoebae (thecamoebians) were used to track the spatial extent and temporal evolution of mine loading and its impact on aquatic biota in Lake Pyhäjärvi, central Finland. Pyhäsa...
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Article
Tracking the Aquatic Impacts of a Historical Metal Mine Using Lacustrine Protists and Diatom Algae
Two lake sediment cores collected near a closed Cu–Au mine were analyzed for testate amoebas, diatoms, and geochemistry to compare their utility for assessment and monitoring of aquatic impacts of metal mines....
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Article
Mine water-induced gradients in sediment metals and arcellacean assemblages in a boreal freshwater bay (Petkellahti, Finland)
Sediment chemistry and arcellacean community composition were analyzed to study the ecological effects of copper mine-derived acidic and metal-rich waters in a freshwater bay in eastern Finland. To track spati...
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Article
Holocene records of carbon and hydrogen isotope ratios of organic matter in annually laminated sediments of Lake Korttajärvi, central Finland
An 11.6 m long continuous succession of annually laminated sediments from Lake Korttajärvi in central Finland was investigated for the isotopic composition of carbon and hydrogen in organic matter. The sequenc...
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Article
Palaeolimnological evidence for recent climatic change in lakes from the northern Urals, arctic Russia
The recent sediments from two deep arctic lakes, Mitrofanovskoe and Vanuk-ty, situated in the permafrost belt within the Bol’shezemel’skaya Tundra in the northern Ural region, were studied for diatoms, chirono...
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Article
A diatom-based inference model for autumn epilimnetic total phosphorus concentration and its application to a presently eutrophic boreal lake
A diatom transfer function to infer epilimnetic total phosphorus (TP) concentration was derived using surface sediment diatom data from 68 medium-sized (10–1000 ha) lakes in Southern Finland. Publicly availabl...
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Article
The effect of Holocene treeline fluctuations on the sediment chemistry of Lake Kilpisjärvi, Finland
The sediments of Lake Kilpisjärvi were described and analysed for element chemistry and pollen to study the effects of treeline fluctuations in the catchment. Lake Kilpisjärvi is one of the largest lakes in Fi...
