Messineo, Valentina and Bogialli, Sara and Melchiorre, Serena and Sechi, Nicola and Lugliè, Antonella Gesuina Laura and Casiddu, Paola and Mariani, Maria Antonietta and Padedda, Bachisio Mario and Di Corcia, Antonio and Mazza, Roberto and Carloni, Ermanno and Bruno, Milena (2009) Cyanobacterial toxins in Italian freshwaters. Limnologica, Vol. 39 (2), p. 95-106. ISSN 0075-9511. Article.
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This study focuses on the occurrence and distribution of cyanobacterial toxins from 1989 to 2006 in several Italian lakes of different characteristics and human uses, the latter including drinking water abstraction and recreation. Phytoplankton and LC/MS/MS toxin analyses were performed on surface water samples collected from 28 lakes. The most widespread species associated with toxin production belonged to the genera Microcystis, Planktothrix and Anabaena. Extracellular concentrations varied from non-detectable values up to 226.16 ng/mL for microcystins (sum of all variants), to 126 ng/mL for total cylindrospermopsin, and to 100 mg/g (dry weight) for anatoxin-a. The toxin concentrations in the lake waters did not always correlate with the cyanobacteria cell densities. This implies a need for control studies including toxin detection in water together with microscopic cell evaluations, in order to avoid possible toxin underestimates.
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