-
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...
-
Article
Open AccessSulfur analyses and mineralogical data in the preliminary mine waste characterization
The objective of this study was to investigate the use of the acid production potential (AP) calculation factor and seven different S analysis methods in the preliminary mine waste characterization by analyzin...
-
Article
Open AccessIn situ remediation of metal(loid)-contaminated lake sediments with alkali-activated blast furnace slag granule amendment: A field experiment
Adsorbent amendment to contaminated sediments is one in situ remediation method to decrease the bioaccessibility of pollutants from the sediments. In this work, alkali-activated blast furnace slag (BFS) granul...
-
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...
-
Article
Factors controlling recent diatom assemblages across a steep local nutrient gradient in central-eastern Finland
The Iisalmi Route, a chain of lakes in central-eastern Finland, is more eutrophic than its surroundings. We used multivariate analyses to study the influence of selected environmental factors (water quality, b...
-
Article
Open AccessEcosystem change in the large and shallow Lake Säkylän Pyhäjärvi, Finland, during the past ~400 years: implications for management
Lake Säkylän Pyhäjärvi has been an important fishing site and drinking water source for the local population for centuries. The lake has undergone significant changes: (1) the water level was lowered in the 16...
-
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 ...
-
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...
-
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....
-
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...
-
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...
-
Article
Sediment and phytoplankton records of the cyanobacterial genus Anabaena in boreal Lake Pyhäjärvi
Past occurrence and quantities of Anabaena cyanobacteria in Lake Pyhäjärvi, SW Finland, were investigated using sediment and phytoplankton records. A short sediment core covering the past 20 years was examined fo...
-
Article
Distribution of Arcellaceans (Testate Amoebae) in the Sediments of a Mine Water Impacted Bay of Lake Retunen, Finland
This study employs chemical fractionations of sedimentary metals and analyses of sediment arcellacean (thecamoebian) faunas to study the ecological effects of mining wastewaters in a boreal lake bay that recei...
-
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...
-
Article
Response of a shallow boreal lake to recent nutrient enrichment – implications for diatom-based phosphorus reconstructions
Water quality of the shallow, mesotrophic, and macrophyte-dominated Lake Kaljasjärvi has been monitored at three to four year intervals since 1978. During the monitoring period, surface-water total phosphorus ...
-
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...
-
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...
