Cyanobacterial toxins in Italian freshwaters
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- 作者：Valentina Messineo ; Sara Bogialli ; Serena Melchiorre ; Nicola Sechi ; Antonella Lugliè ; Paola Casiddu ; Maria Antonietta Mariani ; Bachisio Mario Padedda ; Antonio Di Corcia ; Roberto Mazza ; Ermanno Carloni ; Milena Bruno
- 关键词：Cyanobacteria ; Cyanotoxins ; Microcystin ; Cylindrospermopsin ; Anatoxin-a ; Freshwaters ; Lakes ; Italy
- 刊名：Limnologica - Ecology and Management of Inland Waters
- 出版年：2009
- 出版时间：May 2009
- 年：2009
- 卷：39
- 期：2
- 页码：95-106
- 全文大小：499 K
文摘
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 μg/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.