Ecotoxicology

, Volume 21, Issue 7, pp 1805–1816

Direct and indirect effects of the glyphosate formulation Glifosato Atanor® on freshwater microbial communities

  • María Solange Vera
  • Eugenia Di Fiori
  • Leonardo Lagomarsino
  • Rodrigo Sinistro
  • Roberto Escaray
  • María Mercedes Iummato
  • Angela Juárez
  • María del Carmen Ríos de Molina
  • Guillermo Tell
  • Haydée Pizarro
Article

DOI: 10.1007/s10646-012-0915-2

Cite this article as:
Vera, M.S., Di Fiori, E., Lagomarsino, L. et al. Ecotoxicology (2012) 21: 1805. doi:10.1007/s10646-012-0915-2

Abstract

Glyphosate-based formulations are among the most widely used herbicides in the world. The effect of the formulation Glifosato Atanor® on freshwater microbial communities (phytoplankton, bacterioplankton, periphyton and zooplankton) was assessed through a manipulative experiment using six small outdoor microcosms of small volume. Three of the microcosms were added with 3.5 mg l−1 of glyphosate whereas the other three were left as controls without the herbicide. The treated microcosms showed a significant increase in total phosphorus, not fully explained by the glyphosate present in the Glifosato Atanor®. Therefore, part of the phosphorus should have come from the surfactants of the formulation. The results showed significant direct and indirect effects of Glifosato Atanor® on the microbial communities. A single application of the herbicide caused a fast increase both in the abundance of bacterioplankton and planktonic picocyanobacteria and in chlorophyll a concentration in the water column. Although metabolic alterations related to oxidative stress were induced in the periphyton community, the herbicide favored its development, with a large contribution of filamentous algae typical of nutrient-rich systems, with shallow and calm waters. An indirect effect of the herbicide on the zooplankton was observed due to the increase in the abundance of the rotifer Lecane spp. as a consequence of the improved food availability given by picocyanobacteria and bacteria. The formulation affected directly a fraction of copepods as a target. It was concluded that the Glifosato Atanor® accelerates the deterioration of the water quality, especially when considering small-volume water systems.

Keywords

Glyphosate formulation Microcosms Microbial communities Water quality 

Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  • María Solange Vera
    • 1
    • 5
  • Eugenia Di Fiori
    • 1
    • 5
  • Leonardo Lagomarsino
    • 2
    • 5
  • Rodrigo Sinistro
    • 1
    • 5
  • Roberto Escaray
    • 2
    • 5
  • María Mercedes Iummato
    • 3
    • 5
  • Angela Juárez
    • 3
    • 4
  • María del Carmen Ríos de Molina
    • 3
    • 5
  • Guillermo Tell
    • 1
    • 5
  • Haydée Pizarro
    • 1
    • 5
  1. 1.Laboratorio de Limnología, Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y NaturalesUniversidad de Buenos AiresCiudad de Buenos AiresArgentina
  2. 2.Instituto de Investigaciones Biotecnológicas, Instituto Tecnológico de Chascomús (IIB-INTECH)Chascomús, Buenos AiresArgentina
  3. 3.Laboratorio de Enzimología, Estrés Oxidativo y Metabolismo, Departamento de Química Biológica, Facultad de Ciencias Exactas y NaturalesUniversidad de Buenos AiresCiudad de Buenos AiresArgentina
  4. 4.Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y NaturalesUniversidad de Buenos AiresCiudad de Buenos AiresArgentina
  5. 5.Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)Buenos AiresArgentina

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