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Title: Temperature effects explain continental scale distribution of cyanobacterial toxins
Author: Gomà Martínez, Joan
Trapote Forné, Mari Carmen
Vegas Vilarrúbia, Teresa Elena
Obrador Sala, Biel
Hernández Hernández, Armand
Marcé Romero, Rafael
Catalán García, Núria
Keywords: Toxines bacterianes
Canvi climàtic
Bacterial toxins
Climatic change
Issue Date: 13-Apr-2018
Abstract: Insight into how environmental change determines the production and distribution of cyanobacterial toxins is necessary for risk assessment. Management guidelines currently focus on hepatotoxins (microcystins). Increasing attention is given to other classes, such as neurotoxins (e.g., anatoxin-a) and cytotoxins (e.g., cylindrospermopsin) due to their potency. Most studies examine the relationship between individual toxin variants and environmental factors, such as nutrients, temperature and light. In summer 2015, we collected samples across Europe to investigate the effect of nutrient and temperature gradients on the variability of toxin production at a continental scale. Direct and indirect effects of temperature were the main drivers of the spatial distribution in the toxins produced by the cyanobacterial community, the toxin concentrations and toxin quota. Generalized linear models showed that a Toxin Diversity Index (TDI) increased with latitude, while it decreased with water stability. Increases in TDI were explained through a significant increase in toxin variants such as MC-YR, anatoxin and cylindrospermopsin, accompanied by a decreasing presence of MC-LR. While global warming continues, the direct and indirect effects of increased lake temperatures will drive changes in the distribution of cyanobacterial toxins in Europe, potentially promoting selection of a few highly toxic species or strains.
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It is part of: Toxins, 2018, vol. 10, num. 4, p. 156
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ISSN: 2072-6651
Appears in Collections:Articles publicats en revistes (Institut de Recerca de la Biodiversitat (IRBio))
Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)
Publicacions de projectes de recerca finançats per la UE

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