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Toxins 2014, 6(2), 509-522; doi:10.3390/toxins6020509

Geographical Patterns in Cyanobacteria Distribution: Climate Influence at Regional Scale

1,* , 1
1 Limnologie sarl, 16 rue Paul Langevin, Rennes 35200, France 2 Ecole des Hautes Etudes en Santé Publique de Rennes (EHESP), Sorbonne Paris Cité, Avenue du Professeur Léon Bernard-CS 74312, Rennes Cedex 35043, France 3 Institut National de la Santé Et de la Recherche Médical (INSERM), Unité 185, Institut de Recherche Santé Environnement et Travail (IRSET), Laboratoire d'Etude et Recherche en Environnement et Santé (LERES), 101 rue de Tolbiac, 75654 Paris Cedex 13, France
* Author to whom correspondence should be addressed.
Received: 30 October 2013 / Revised: 15 January 2014 / Accepted: 20 January 2014 / Published: 28 January 2014
(This article belongs to the collection Marine and Freshwater Toxins)
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Cyanobacteria are a component of public health hazards in freshwater environments because of their potential as toxin producers. Eutrophication has long been considered the main cause of cyanobacteria outbreak and proliferation, whereas many studies emphasized the effect of abiotic parameters (mainly temperature and light) on cell growth rate or toxin production. In view of the growing concerns of global change consequences on public health parameters, this study attempts to enlighten climate influence on cyanobacteria at regional scale in Brittany (NW France). The results show that homogeneous cyanobacteria groups are associated with climatic domains related to temperature, global radiation and pluviometry, whereas microcystins (MCs) occurrences are only correlated to local cyanobacteria species composition. As the regional climatic gradient amplitude is similar to the projected climate evolution on a 30-year timespan, a comparison between the present NW and SE situations was used to extrapolate the evolution of geographical cyanobacteria distribution in Brittany. Cyanobacteria composition should shift toward species associated with more frequent Microcystins occurrences along a NW/SE axis whereas lakes situated along a SW/NE axis should transition to species (mainly Nostocales) associated with lower MCs detection frequencies.
Keywords: cyanobacteria; microcystin; toxins; climate change cyanobacteria; microcystin; toxins; climate change
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Pitois, F.; Thoraval, I.; Baurès, E.; Thomas, O. Geographical Patterns in Cyanobacteria Distribution: Climate Influence at Regional Scale. Toxins 2014, 6, 509-522.

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