Effects of the herbicide roundup on freshwater microbial communities: A mesocosm study

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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,...

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Autores principales:	Rodríguez, Patricia Laura, Allende, Luz, Ferraro, Marcela Andrea, Izaguirre, Irina, Pizarro, Haydee Norma, Bonetto, Carlos A., Zagarese, Horacio Ernesto
Publicado:	2007
Materias:	Glyphosate Herbicide Optical properties Periphyton Phytoplankton Pigments Primary production Roundup Water chemistry Wetlands abundance bioassay ecological impact food web freshwater ecosystem glyphosate mesocosm microbial community nanoplankton optical property periphyton pesticide application phosphorus physicochemical property phytoplankton pigment primary production toxicology water chemistry Amphibia Cyanobacteria Invertebrata Pisces drug derivative fresh water glycine herbicide alga article bacterium chemistry drug effect ecosystem environmental protection microbiology time water pollutant water pollution Algae Bacteria Conservation of Natural Resources Ecosystem Fresh Water Glycine Herbicides Pigments, Biological Time Factors Water Pollutants, Chemical Water Pollution, Chemical
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10510761_v17_n8_p2310_Perez http://hdl.handle.net/20.500.12110/paper_10510761_v17_n8_p2310_Perez
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_10510761_v17_n8_p2310_Perez
record_format	dspace
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Glyphosate Herbicide Optical properties Periphyton Phytoplankton Pigments Primary production Roundup Water chemistry Wetlands abundance bioassay ecological impact food web freshwater ecosystem glyphosate mesocosm microbial community nanoplankton optical property periphyton pesticide application phosphorus physicochemical property phytoplankton pigment primary production toxicology water chemistry Amphibia Cyanobacteria Invertebrata Pisces drug derivative fresh water glycine glyphosate herbicide pigment alga article bacterium chemistry drug effect ecosystem environmental protection microbiology phytoplankton time water pollutant water pollution Algae Bacteria Conservation of Natural Resources Ecosystem Fresh Water Glycine Herbicides Phytoplankton Pigments, Biological Time Factors Water Pollutants, Chemical Water Pollution, Chemical
spellingShingle	Glyphosate Herbicide Optical properties Periphyton Phytoplankton Pigments Primary production Roundup Water chemistry Wetlands abundance bioassay ecological impact food web freshwater ecosystem glyphosate mesocosm microbial community nanoplankton optical property periphyton pesticide application phosphorus physicochemical property phytoplankton pigment primary production toxicology water chemistry Amphibia Cyanobacteria Invertebrata Pisces drug derivative fresh water glycine glyphosate herbicide pigment alga article bacterium chemistry drug effect ecosystem environmental protection microbiology phytoplankton time water pollutant water pollution Algae Bacteria Conservation of Natural Resources Ecosystem Fresh Water Glycine Herbicides Phytoplankton Pigments, Biological Time Factors Water Pollutants, Chemical Water Pollution, Chemical Rodríguez, Patricia Laura Allende, Luz Ferraro, Marcela Andrea Izaguirre, Irina Pizarro, Haydee Norma Bonetto, Carlos A. Zagarese, Horacio Ernesto Effects of the herbicide roundup on freshwater microbial communities: A mesocosm study
topic_facet	Glyphosate Herbicide Optical properties Periphyton Phytoplankton Pigments Primary production Roundup Water chemistry Wetlands abundance bioassay ecological impact food web freshwater ecosystem glyphosate mesocosm microbial community nanoplankton optical property periphyton pesticide application phosphorus physicochemical property phytoplankton pigment primary production toxicology water chemistry Amphibia Cyanobacteria Invertebrata Pisces drug derivative fresh water glycine glyphosate herbicide pigment alga article bacterium chemistry drug effect ecosystem environmental protection microbiology phytoplankton time water pollutant water pollution Algae Bacteria Conservation of Natural Resources Ecosystem Fresh Water Glycine Herbicides Phytoplankton Pigments, Biological Time Factors Water Pollutants, Chemical Water Pollution, Chemical
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(λ), where λ 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. Round-up 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. © 2007 by the Ecological Society of America.
author	Rodríguez, Patricia Laura Allende, Luz Ferraro, Marcela Andrea Izaguirre, Irina Pizarro, Haydee Norma Bonetto, Carlos A. Zagarese, Horacio Ernesto
author_facet	Rodríguez, Patricia Laura Allende, Luz Ferraro, Marcela Andrea Izaguirre, Irina Pizarro, Haydee Norma Bonetto, Carlos A. Zagarese, Horacio Ernesto
author_sort	Rodríguez, Patricia Laura
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	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10510761_v17_n8_p2310_Perez http://hdl.handle.net/20.500.12110/paper_10510761_v17_n8_p2310_Perez
work_keys_str_mv	AT rodriguezpatricialaura effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy AT allendeluz effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy AT ferraromarcelaandrea effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy AT izaguirreirina effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy AT pizarrohaydeenorma effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy AT bonettocarlosa effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy AT zagaresehoracioernesto effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy
_version_	1768545520940220416
spelling	paper:paper_10510761_v17_n8_p2310_Perez2023-06-08T16:02:57Z Effects of the herbicide roundup on freshwater microbial communities: A mesocosm study Rodríguez, Patricia Laura Allende, Luz Ferraro, Marcela Andrea Izaguirre, Irina Pizarro, Haydee Norma Bonetto, Carlos A. Zagarese, Horacio Ernesto Glyphosate Herbicide Optical properties Periphyton Phytoplankton Pigments Primary production Roundup Water chemistry Wetlands abundance bioassay ecological impact food web freshwater ecosystem glyphosate mesocosm microbial community nanoplankton optical property periphyton pesticide application phosphorus physicochemical property phytoplankton pigment primary production toxicology water chemistry Amphibia Cyanobacteria Invertebrata Pisces drug derivative fresh water glycine glyphosate herbicide pigment alga article bacterium chemistry drug effect ecosystem environmental protection microbiology phytoplankton time water pollutant water pollution Algae Bacteria Conservation of Natural Resources Ecosystem Fresh Water Glycine Herbicides Phytoplankton Pigments, Biological Time Factors Water Pollutants, Chemical Water Pollution, Chemical 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(λ), where λ 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. Round-up 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. © 2007 by the Ecological Society of America. Fil:Rodríguez, P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Allende, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Ferraro, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Izaguirre, I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Pizarro, H. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Bonetto, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Zagarese, H. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2007 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10510761_v17_n8_p2310_Perez http://hdl.handle.net/20.500.12110/paper_10510761_v17_n8_p2310_Perez

Effects of the herbicide roundup on freshwater microbial communities: A mesocosm study

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