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Le Alghe planctoniche dell'invaso del Mulargia (Sardegna centro-meridionale) con particolare riferimento ad una fioritura prolungata di Oscillatoria rubescens D.C. in rapporto alle condizioni chimiche e fisiche

Sechi, Nicola and Lugliè, Antonella Gesuina Laura (1987) Le Alghe planctoniche dell'invaso del Mulargia (Sardegna centro-meridionale) con particolare riferimento ad una fioritura prolungata di Oscillatoria rubescens D.C. in rapporto alle condizioni chimiche e fisiche. In: 7. Congresso dell'Associazione italiana di oceanologia e limnologia: atti, 11-14 giugno 1986, Trieste, Italia. Livorno, Alessandro Miarelli Editore per AIOL. p. 435-440. (Atti della Associazione italiana di oceanologia e limnologia, 7). Conference or Workshop Item.

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Abstract

Between January and July 1985 a massive algal bloom occurred in Mulargia reservoir that supplies water for drinking purpose. Serious problems happened in the water treatment plant. A limnological research, particularly on the phytoplankton structure and biomass, chlorophyll a and nutrient contents, started immediately in February and it is outstanding still. The sampling is made every week near to the dam. Many phytoplanktonic species, belongs to four different class, were identified. Numerically, Bluegreen algae were found to be the main class with high density and biomass, due to Oscillatoria rubescens D.C.; it is present from February to July and, in this period, it is totally dominant. It is the reason of the problems in water treatment plant. The other class are insignificant in biomass terms. The mean annual contents of biomass and chlorophyll a are 6,6 cm3m-3 and 13 mg m-3 respectively; they are very high therefore is possible an eutrophic level of the lake. The nutrient content, on the contrary, is quite low (30 mg P-tot. m-3, 220 mg N-inor. m-3, 550 mg N-tot. M-3).

Item Type:Conference or Workshop Item (Lecture)
ID Code:5268
Status:Published
Uncontrolled Keywords:Algal blooms, Oscillatoria rubescens D.C., Mulargia reservoir, Sardinia
Subjects:Area 05 - Scienze biologiche > BIO/07 Ecologia
Divisions:001 Università di Sassari > 01 Dipartimenti > Scienze botaniche, ecologiche e geologiche
Publisher:Alessandro Miarelli Editore per AIOL
Deposited On:20 Dec 2010 17:08

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