Effects of the herbicide Roundup on freshwater microbial communities: a mesocosm study

Mostrar todas las versiones(2)

The impact of the widely used herbicide glyphosate has been mainly studied in terrestrial weed control, laboratory bioassays, and field studies focusing on invertebrates, amphibians, and fishes. Despite the importance of phytoplankton and periphyton communities at the base of the aquatic food webs,...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Pérez, Gonzalo L., Torremorell, Ana María, Mugni, Hernán Diego, Rodríguez, Patricia Laura, Vera, María Solange, Do Nascimento, Mauro, Allende, Luz, Bustingorry, José Fernando, Escaray, Francisco José, Ferraro, Marcela Andrea, Izaguirre, Irina, Pizarro, Haydée Norma, Bonetto, Carlos A., Morris, Donald P., Zagarese, Horacio Ernesto
Formato: Articulo
Lenguaje:Inglés
Publicado: 2007
Materias:
Ciencias Naturales
glyphosate; herbicide; optical properties; periphyton; phytoplankton; pigments; primary production; Roundup; water chemistry; wetlands
Contaminación del Agua
Herbicidas
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/68025
https://esajournals.onlinelibrary.wiley.com/doi/abs/10.1890/07-0499.1
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-68025
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
glyphosate; herbicide; optical properties; periphyton; phytoplankton; pigments; primary production; Roundup; water chemistry; wetlands
Contaminación del Agua
Herbicidas
spellingShingle Ciencias Naturales
glyphosate; herbicide; optical properties; periphyton; phytoplankton; pigments; primary production; Roundup; water chemistry; wetlands
Contaminación del Agua
Herbicidas
Pérez, Gonzalo L.
Torremorell, Ana María
Mugni, Hernán Diego
Rodríguez, Patricia Laura
Vera, María Solange
Do Nascimento, Mauro
Allende, Luz
Bustingorry, José Fernando
Escaray, Francisco José
Ferraro, Marcela Andrea
Izaguirre, Irina
Pizarro, Haydée Norma
Bonetto, Carlos A.
Morris, Donald P.
Zagarese, Horacio Ernesto
Effects of the herbicide Roundup on freshwater microbial communities: a mesocosm study
topic_facet Ciencias Naturales
glyphosate; herbicide; optical properties; periphyton; phytoplankton; pigments; primary production; Roundup; water chemistry; wetlands
Contaminación del Agua
Herbicidas
description The impact of the widely used herbicide glyphosate has been mainly studied in terrestrial weed control, laboratory bioassays, and field studies focusing on invertebrates, amphibians, and fishes. Despite the importance of phytoplankton and periphyton communities at the base of the aquatic food webs, fewer studies have investigated the effects of glyphosate on freshwater microbial assemblages. We assessed the effect of the commercial formulation Roundup using artificial earthen mesocosms. The herbicide was added at three doses: a control (without Roundup) and two treatments of 6 and 12 mg/L of the active ingredient (glyphosate). Estimates of the dissipation rate (k) were similar in the two treatments (half-lives of 5.77 and 7.37 d, respectively). The only two physicochemical parameters showing statistically significant differences between treatments and controls were the downward vertical spectral attenuation coefficient kd(k), where k is wavelength, and total phosphorus concentration (TP). At the end of the experiment, the treated mesocosms showed a significant increase in the ratio kd(490 nm)/kd(550 nm) and an eightfold increase in TP. Roundup affected the structure of phytoplankton and periphyton assemblages. Total micro- and nanophytoplankton decreased in abundance in treated mesocosms. In contrast, the abundance of picocyanobacteria increased by a factor of about 40. Primary production also increased in treated mesocosms (roughly by a factor of two). Similar patterns were observed in the periphytic assemblages, which showed an increased proportion of dead : live individuals and increased abundances of cyanobacteria (about 4.5-fold). Interestingly, the observed changes in the microbial assemblages were captured by the analysis of the pigment composition of the phytoplankton, the phytoplankton absorption spectra, and the analysis of the optical properties of the water. The observed changes in the structure of the microbial assemblages are more consistent with a direct toxicological effect of glyphosate rather than an indirect effect mediated by phosphorus enrichment.
format Articulo
Articulo
author Pérez, Gonzalo L.
Torremorell, Ana María
Mugni, Hernán Diego
Rodríguez, Patricia Laura
Vera, María Solange
Do Nascimento, Mauro
Allende, Luz
Bustingorry, José Fernando
Escaray, Francisco José
Ferraro, Marcela Andrea
Izaguirre, Irina
Pizarro, Haydée Norma
Bonetto, Carlos A.
Morris, Donald P.
Zagarese, Horacio Ernesto
author_facet Pérez, Gonzalo L.
Torremorell, Ana María
Mugni, Hernán Diego
Rodríguez, Patricia Laura
Vera, María Solange
Do Nascimento, Mauro
Allende, Luz
Bustingorry, José Fernando
Escaray, Francisco José
Ferraro, Marcela Andrea
Izaguirre, Irina
Pizarro, Haydée Norma
Bonetto, Carlos A.
Morris, Donald P.
Zagarese, Horacio Ernesto
author_sort Pérez, Gonzalo L.
title Effects of the herbicide Roundup on freshwater microbial communities: a mesocosm study
title_short Effects of the herbicide Roundup on freshwater microbial communities: a mesocosm study
title_full Effects of the herbicide Roundup on freshwater microbial communities: a mesocosm study
title_fullStr Effects of the herbicide Roundup on freshwater microbial communities: a mesocosm study
title_full_unstemmed Effects of the herbicide Roundup on freshwater microbial communities: a mesocosm study
title_sort effects of the herbicide roundup on freshwater microbial communities: a mesocosm study
publishDate 2007
url http://sedici.unlp.edu.ar/handle/10915/68025
https://esajournals.onlinelibrary.wiley.com/doi/abs/10.1890/07-0499.1
work_keys_str_mv AT perezgonzalol effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy
AT torremorellanamaria effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy
AT mugnihernandiego effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy
AT rodriguezpatricialaura effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy
AT veramariasolange effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy
AT donascimentomauro effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy
AT allendeluz effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy
AT bustingorryjosefernando effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy
AT escarayfranciscojose effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy
AT ferraromarcelaandrea effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy
AT izaguirreirina effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy
AT pizarrohaydeenorma effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy
AT bonettocarlosa effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy
AT morrisdonaldp effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy
AT zagaresehoracioernesto effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy
bdutipo_str Repositorios
_version_ 1764820483083075584

Ejemplares similares