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Strict coupling between the development of Planktothrix rubescens and microcystin content in two nearby lakes south of the Alps (lakes Garda and Ledro)

Published online by Cambridge University Press:  18 November 2013

Nico Salmaso ,
Adriano Boscaini ,
Shiva Shams  and
Leonardo Cerasino
Nico Salmaso*
Affiliation:
IASMA Research and Innovation Centre, Istituto Agrario di S. Michele all'Adige – Fondazione E. Mach, Via E. Mach 1, 38010 S. Michele all'Adige, Trento, Italy
Adriano Boscaini
Affiliation:
IASMA Research and Innovation Centre, Istituto Agrario di S. Michele all'Adige – Fondazione E. Mach, Via E. Mach 1, 38010 S. Michele all'Adige, Trento, Italy
Shiva Shams
Affiliation:
IASMA Research and Innovation Centre, Istituto Agrario di S. Michele all'Adige – Fondazione E. Mach, Via E. Mach 1, 38010 S. Michele all'Adige, Trento, Italy Human and Environmental Toxicology Group, Department of Biology, University of Konstanz, P.O. Box X-918, D-78457, Konstanz, Germany
Leonardo Cerasino
Affiliation:
IASMA Research and Innovation Centre, Istituto Agrario di S. Michele all'Adige – Fondazione E. Mach, Via E. Mach 1, 38010 S. Michele all'Adige, Trento, Italy
*
*Corresponding author: nico.salmaso@fmach.it
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Abstract

Cyanobacteria and their principal cyanotoxins were studied in the largest Italian lake (Lake Garda, 65 m a.s.l.) and in a near smaller reservoir (Lake Ledro, 652 m a.s.l.). The two lakes share a fraction of water due to a pipe pumping water from and into the lakes and the same dominant cyanobacterial species (Planktothrix rubescens). Despite the differences in the concentrations of cyanotoxins (mostly microcystins, MCs) and biovolumes of P. rubescens (BVPr) (over one order of magnitude), the Bayesian analyses linking these two variables showed striking similarities, suggesting the existence of similar toxic genotypes colonizing the two water bodies and a constitutive MC production. It was stressed that a greater sensitivity and reliability in the management strategies aimed at minimizing the risks due to cyanobacteria should also contemplate the use of specific lake-tailored models linking MCs and BVPr.

Keywords

CyanobacteriaPlanktothrix rubescensmicrocystinsrisk assessmentBayesian analysis
Type
Research Article
Information
Annales de Limnologie - International Journal of Limnology , Volume 49 , Issue 4 , 2013 , pp. 309 - 318
Copyright
© EDP Sciences, 2013

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