Abstract
Traunsee, a 191 m deep Alpine lake in Austria, is affected by industrial tailings from the soda and salt mining industries since 1883. In 1998 littoral water chloride concentrations ranged between 40 and 85 mg L-1 and the highest conductivity was 560 μS cm-1, which is almost double as high as the values reported from the two nearby reference lakes. Chloride concentrations increased towards the location of the industrial salt and soda emission into the lake. Analogously to the chloride gradient, the epilithic littoral diatom flora changes towards the waste inlet. Shifts in the species percentages towards the emission source, a high percentage of taxa with large conductivity tolerances, the presence of a small Achnanthes minutissima Kützing morphotype, and occurrences of taxa focused at habitats of higher electrolyte content, indicate subtle impacts on the epilithic diatom flora. An analysis of the seasonal succession of the epilithic diatoms at the waste inlet compared to a lake intern reference site, reveals that only during the late summer period in 1998 the diatom assemblage at the waste inlet became significantly different, indicating seasonally restricted effects of the industrial emissions.
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Wunsam, S., Kamenik, C. & Schmidt, R. Epilithic Diatoms in an Alpine Lake (Traunsee, Austria) Affected by Soda and Salt Mining Industries. Water, Air, & Soil Pollution: Focus 2, 93–108 (2002). https://doi.org/10.1023/A:1020393017101
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DOI: https://doi.org/10.1023/A:1020393017101