Effects of the herbicide roundup on freshwater microbial communities: A mesocosm study
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,...
Guardado en:
| Autores principales: | , , , , , , , , , , , , , , |
|---|---|
| Formato: | JOUR |
| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_10510761_v17_n8_p2310_Perez |
| Aporte de: |
| id |
todo: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 Pérez, G.L. Torremorell, A. Mugni, H. Rodríguez, P. Solange Vera, M. Do Nascimento, M. Allende, L. Bustingorry, J. Escaray, R. Ferraro, M. Izaguirre, I. Pizarro, H. Bonetto, C. Morris, D.P. Zagarese, H. 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. |
| format |
JOUR |
| author |
Pérez, G.L. Torremorell, A. Mugni, H. Rodríguez, P. Solange Vera, M. Do Nascimento, M. Allende, L. Bustingorry, J. Escaray, R. Ferraro, M. Izaguirre, I. Pizarro, H. Bonetto, C. Morris, D.P. Zagarese, H. |
| author_facet |
Pérez, G.L. Torremorell, A. Mugni, H. Rodríguez, P. Solange Vera, M. Do Nascimento, M. Allende, L. Bustingorry, J. Escaray, R. Ferraro, M. Izaguirre, I. Pizarro, H. Bonetto, C. Morris, D.P. Zagarese, H. |
| author_sort |
Pérez, G.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 |
| url |
http://hdl.handle.net/20.500.12110/paper_10510761_v17_n8_p2310_Perez |
| work_keys_str_mv |
AT perezgl effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy AT torremorella effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy AT mugnih effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy AT rodriguezp effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy AT solangeveram effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy AT donascimentom effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy AT allendel effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy AT bustingorryj effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy AT escarayr effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy AT ferrarom effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy AT izaguirrei effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy AT pizarroh effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy AT bonettoc effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy AT morrisdp effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy AT zagareseh effectsoftheherbiciderounduponfreshwatermicrobialcommunitiesamesocosmstudy |
| _version_ |
1782029239623614464 |
| spelling |
todo:paper_10510761_v17_n8_p2310_Perez2023-10-03T16:00:30Z Effects of the herbicide roundup on freshwater microbial communities: A mesocosm study Pérez, G.L. Torremorell, A. Mugni, H. Rodríguez, P. Solange Vera, M. Do Nascimento, M. Allende, L. Bustingorry, J. Escaray, R. Ferraro, M. Izaguirre, I. Pizarro, H. Bonetto, C. Morris, D.P. Zagarese, H. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_10510761_v17_n8_p2310_Perez |