Search results for "Soft water"
showing 3 items of 3 documents
Impact of eutrophication on the carbon stable-isotopic baseline of benthic invertebrates in two deep soft-water lakes
2017
International audience
Comparative study of phytoplankton in an oligotrophic soft water lake under different pH-phosphate ranges
1998
This work reports phytoplankton changes in a shallow, acidic and oligotrophic lake (Loch Rusky, Scotland) from two different periods: one with artificial phosphate fertilization and neutral pH (SRP 3–18 µg l-1, pH 6.6–7.8, 1972–73) and the other with low phosphate and acidic pH values (SRP <1.5 µg l-1, pH 5.6–6.9, 1985–86). Phosphate enhanced markedly total algal biomass and favoured the presence of cyanophytes, especially in the summer epilimnion, while cryptophytes dominated at this time during unfertilized periods. Anabaena sp. peaked during summer and a higher density of Ceratium hirundinella and Peridinium sp. in mid-summer was also observed during the fertilized period. Otherwise, alg…
Toxicity of Mining-Contaminated Lake Sediments to Lumbriculus variegatus
2021
AbstractBoreal lakes with soft water and low buffering capacity are susceptible to excess ion loading resulting from metal mining. The impact of two Finish mining sites in downstream lakes was assessed with a chronic sediment toxicity test using a laboratory-reared freshwater Lumbriculus variegatus (Oligochaeta). The test organisms were exposed to mining-contaminated natural lake sediments and hypolimnion water (HLW) or artificial freshwater (AFW) as overlying water in two independent experimental setups. In both test setups, growth and reproduction of L. variegatus were lower in sediments from the lakes receiving high amount of mining effluents from the mines nearby. In the biomining site,…