Abstract
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 1−1, pH 6.6–7.8, 1972–73) and the other with low phosphate and acidic pH values (SRP < 1.5 µg 1−1, 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, algal composition and periodicity remained similar for the two comparative periods. In both, diatoms (Asterionella formosa and Aulacoseira italica) dominated during spring.
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Romo, S. (1998). Comparative study of phytoplankton in an oligotrophic soft water lake under different pH-phosphate ranges. In: Alvarez-Cobelas, M., Reynolds, C.S., Sánchez-Castillo, P., Kristiansen, J. (eds) Phytoplankton and Trophic Gradients. Developments in Hydrobiology, vol 129. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-2668-9_12
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DOI: https://doi.org/10.1007/978-94-017-2668-9_12
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