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Indagine limnologica pluriennale (dal 1991 al 1993) sul lago artificiale di Sos Canales (Sardegna settentrionale)

Lugliè, Antonella Gesuina Laura and Mameli, Gianpaolo and Sechi, Nicola (1996) Indagine limnologica pluriennale (dal 1991 al 1993) sul lago artificiale di Sos Canales (Sardegna settentrionale). In: A.I.O.L. 1994: Atti dell'11. Congresso dell'Associazione Italiana di Oceanologia e Limnologia, 26-28 ottobre 1994, Sorrento, Italia. Genova, [s.n.]. p. 479-489. Conference or Workshop Item.

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Abstract

From January 1991 to November 1993 a limnological survey was carried out on Lake Sos Canales (Sardinia), a reservoir that gives water for drinking use. The study started just after a dry period which was responsible for a strong decrease of the lake volume. This fact affected the dynamics of some parameters. During the three years studied the annual mean values of nitrate decreased (from 948 mg N m-3 in 1991 to 204 mg N m-3 in 1993) whereas the total phosphorus was more stable, variing from 34 mg P m-3 to 27 mg P m-3 in the three years. Phytoplankton increased, as indicated by the annual mean values in the photic zone of chlophyll a, cellular density and biomass; on the contrary, mean values of transparency decreased, as indicaed by the Secchi disk. Cyanophyceae were the most important group for the density amount and Dinophyceae for the biomass amount; in 1993 the Cyanophyceae biomass was important, too. The trophic status (O.E.C.D., 1982) was dubious and the lake was classified as eutrophic for the phytoplankton biomass and composition, clorophyll a, transparency and oxygen dynamics and as mesotrophic on the basis of the mean values of total phosphorus and the pH dynamics. The experimental chlorophyll and phosphorous concentrations were higher than theorethical values calculated on the basis of Vollenweider's model (O.E.C.D., 1982) using theoretic loading from watershed.

Item Type:Conference or Workshop Item (Contribute)
ID Code:8855
Status:Published
Uncontrolled Keywords:Fitoplancton, stato trofico, laghi artificiali, Sardegna
Subjects:Area 05 - Scienze biologiche > BIO/07 Ecologia
Divisions:001 Università di Sassari > 01 Dipartimenti > Scienze botaniche, ecologiche e geologiche
Publisher:[s.n.]
Deposited On:10 Apr 2013 10:44

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