Drought episode modulates the response of river biofilms to Triclosan

Autores
Proia, L.; Vilches, Carolina; Boninneau, C.; Kantiani, L.; Farré, Maria Marcela; Romaní, Anna M.; Sabater Cortés, Sergi; Guasch, H.
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The consequences of global change on rivers include altered flow regime, and entrance of compounds that may be toxic to biota. When water is scarce, a reduced dilution capacity may amplify the effects of chemical pollution. Therefore, studying the response of natural communities to compromised water flow and to toxicants is critical for assessing how global change may affect river ecosystems. This work aims to investigate how an episode of drought might influence the response of river biofilms to pulses of triclosan (TCS). The objectives were to assess the separate and combined effects of simulated drought (achieved through drastic flow alteration) and of TCS exposure on biofilms growing in artificial channels. Thus, three-week-old biofilms were studied under four conditions: Control (normal water flow); Simulated Drought (1 week reduced flow + 2 days interrupted flow); TCS only (normal water flow plus a 48-h pulse of TCS); and Simulated Drought + TCS. All channels were then left for 2 weeks under steady flow conditions, and their responses and recovery were studied. Several descriptors of biofilms were analyzed before and after each step. Flow reduction and subsequent interruption were found to provoke an increase in extracellular phosphatase activity, bacterial mortality and green algae biomass. The TCS pulses severely affected biofilms: they drastically reduced photosynthetic efficiency, the viability of bacteria and diatoms, and phosphate uptake. Latent consequences evidenced significant combined effects caused by the two stressors. The biofilms exposed only to TCS recovered far better than those subjected to both altered flow and subsequent TCS exposure: the latter suffered more persistent consequences, indicating that simulated drought amplified the toxicity of this compound. This finding has implications for river ecosystems, as it suggests that the toxicity of pollutants to biofilms may be exacerbated following a drought.
Fil: Proia, L.. Universidad de Girona; España
Fil: Vilches, Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Luján. Departamento de Ciencias Básicas; Argentina. Universidad de Girona; España
Fil: Boninneau, C.. Universidad de Girona; España
Fil: Kantiani, L.. Instituto Catalán de Investigaciones en Agua; España
Fil: Farré, Maria Marcela. Instituto Catalán de Investigaciones en Agua; España
Fil: Romaní, Anna M..
Fil: Sabater Cortés, Sergi. Universidad de Girona; España. Instituto Catalán de Investigaciones en Agua; España
Fil: Guasch, H.. Universidad de Girona; España
Materia
Biofilms
Drought
Triclosan
Recovery
River
Toxicity
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/20924

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network_name_str CONICET Digital (CONICET)
spelling Drought episode modulates the response of river biofilms to TriclosanProia, L.Vilches, CarolinaBoninneau, C.Kantiani, L.Farré, Maria MarcelaRomaní, Anna M.Sabater Cortés, SergiGuasch, H.BiofilmsDroughtTriclosanRecoveryRiverToxicityhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The consequences of global change on rivers include altered flow regime, and entrance of compounds that may be toxic to biota. When water is scarce, a reduced dilution capacity may amplify the effects of chemical pollution. Therefore, studying the response of natural communities to compromised water flow and to toxicants is critical for assessing how global change may affect river ecosystems. This work aims to investigate how an episode of drought might influence the response of river biofilms to pulses of triclosan (TCS). The objectives were to assess the separate and combined effects of simulated drought (achieved through drastic flow alteration) and of TCS exposure on biofilms growing in artificial channels. Thus, three-week-old biofilms were studied under four conditions: Control (normal water flow); Simulated Drought (1 week reduced flow + 2 days interrupted flow); TCS only (normal water flow plus a 48-h pulse of TCS); and Simulated Drought + TCS. All channels were then left for 2 weeks under steady flow conditions, and their responses and recovery were studied. Several descriptors of biofilms were analyzed before and after each step. Flow reduction and subsequent interruption were found to provoke an increase in extracellular phosphatase activity, bacterial mortality and green algae biomass. The TCS pulses severely affected biofilms: they drastically reduced photosynthetic efficiency, the viability of bacteria and diatoms, and phosphate uptake. Latent consequences evidenced significant combined effects caused by the two stressors. The biofilms exposed only to TCS recovered far better than those subjected to both altered flow and subsequent TCS exposure: the latter suffered more persistent consequences, indicating that simulated drought amplified the toxicity of this compound. This finding has implications for river ecosystems, as it suggests that the toxicity of pollutants to biofilms may be exacerbated following a drought.Fil: Proia, L.. Universidad de Girona; EspañaFil: Vilches, Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Luján. Departamento de Ciencias Básicas; Argentina. Universidad de Girona; EspañaFil: Boninneau, C.. Universidad de Girona; EspañaFil: Kantiani, L.. Instituto Catalán de Investigaciones en Agua; EspañaFil: Farré, Maria Marcela. Instituto Catalán de Investigaciones en Agua; EspañaFil: Romaní, Anna M..Fil: Sabater Cortés, Sergi. Universidad de Girona; España. Instituto Catalán de Investigaciones en Agua; EspañaFil: Guasch, H.. Universidad de Girona; EspañaElsevier Science2013-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/20924Proia, L.; Vilches, Carolina; Boninneau, C.; Kantiani, L.; Farré, Maria Marcela; et al.; Drought episode modulates the response of river biofilms to Triclosan; Elsevier Science; Aquatic Toxicology; 127; 2-2013; 36-450166-445XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0166445X12000197info:eu-repo/semantics/altIdentifier/doi/10.1016/j.aquatox.2012.01.006info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:35:47Zoai:ri.conicet.gov.ar:11336/20924instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:35:48.263CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Drought episode modulates the response of river biofilms to Triclosan
title Drought episode modulates the response of river biofilms to Triclosan
spellingShingle Drought episode modulates the response of river biofilms to Triclosan
Proia, L.
Biofilms
Drought
Triclosan
Recovery
River
Toxicity
title_short Drought episode modulates the response of river biofilms to Triclosan
title_full Drought episode modulates the response of river biofilms to Triclosan
title_fullStr Drought episode modulates the response of river biofilms to Triclosan
title_full_unstemmed Drought episode modulates the response of river biofilms to Triclosan
title_sort Drought episode modulates the response of river biofilms to Triclosan
dc.creator.none.fl_str_mv Proia, L.
Vilches, Carolina
Boninneau, C.
Kantiani, L.
Farré, Maria Marcela
Romaní, Anna M.
Sabater Cortés, Sergi
Guasch, H.
author Proia, L.
author_facet Proia, L.
Vilches, Carolina
Boninneau, C.
Kantiani, L.
Farré, Maria Marcela
Romaní, Anna M.
Sabater Cortés, Sergi
Guasch, H.
author_role author
author2 Vilches, Carolina
Boninneau, C.
Kantiani, L.
Farré, Maria Marcela
Romaní, Anna M.
Sabater Cortés, Sergi
Guasch, H.
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Biofilms
Drought
Triclosan
Recovery
River
Toxicity
topic Biofilms
Drought
Triclosan
Recovery
River
Toxicity
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The consequences of global change on rivers include altered flow regime, and entrance of compounds that may be toxic to biota. When water is scarce, a reduced dilution capacity may amplify the effects of chemical pollution. Therefore, studying the response of natural communities to compromised water flow and to toxicants is critical for assessing how global change may affect river ecosystems. This work aims to investigate how an episode of drought might influence the response of river biofilms to pulses of triclosan (TCS). The objectives were to assess the separate and combined effects of simulated drought (achieved through drastic flow alteration) and of TCS exposure on biofilms growing in artificial channels. Thus, three-week-old biofilms were studied under four conditions: Control (normal water flow); Simulated Drought (1 week reduced flow + 2 days interrupted flow); TCS only (normal water flow plus a 48-h pulse of TCS); and Simulated Drought + TCS. All channels were then left for 2 weeks under steady flow conditions, and their responses and recovery were studied. Several descriptors of biofilms were analyzed before and after each step. Flow reduction and subsequent interruption were found to provoke an increase in extracellular phosphatase activity, bacterial mortality and green algae biomass. The TCS pulses severely affected biofilms: they drastically reduced photosynthetic efficiency, the viability of bacteria and diatoms, and phosphate uptake. Latent consequences evidenced significant combined effects caused by the two stressors. The biofilms exposed only to TCS recovered far better than those subjected to both altered flow and subsequent TCS exposure: the latter suffered more persistent consequences, indicating that simulated drought amplified the toxicity of this compound. This finding has implications for river ecosystems, as it suggests that the toxicity of pollutants to biofilms may be exacerbated following a drought.
Fil: Proia, L.. Universidad de Girona; España
Fil: Vilches, Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Luján. Departamento de Ciencias Básicas; Argentina. Universidad de Girona; España
Fil: Boninneau, C.. Universidad de Girona; España
Fil: Kantiani, L.. Instituto Catalán de Investigaciones en Agua; España
Fil: Farré, Maria Marcela. Instituto Catalán de Investigaciones en Agua; España
Fil: Romaní, Anna M..
Fil: Sabater Cortés, Sergi. Universidad de Girona; España. Instituto Catalán de Investigaciones en Agua; España
Fil: Guasch, H.. Universidad de Girona; España
description The consequences of global change on rivers include altered flow regime, and entrance of compounds that may be toxic to biota. When water is scarce, a reduced dilution capacity may amplify the effects of chemical pollution. Therefore, studying the response of natural communities to compromised water flow and to toxicants is critical for assessing how global change may affect river ecosystems. This work aims to investigate how an episode of drought might influence the response of river biofilms to pulses of triclosan (TCS). The objectives were to assess the separate and combined effects of simulated drought (achieved through drastic flow alteration) and of TCS exposure on biofilms growing in artificial channels. Thus, three-week-old biofilms were studied under four conditions: Control (normal water flow); Simulated Drought (1 week reduced flow + 2 days interrupted flow); TCS only (normal water flow plus a 48-h pulse of TCS); and Simulated Drought + TCS. All channels were then left for 2 weeks under steady flow conditions, and their responses and recovery were studied. Several descriptors of biofilms were analyzed before and after each step. Flow reduction and subsequent interruption were found to provoke an increase in extracellular phosphatase activity, bacterial mortality and green algae biomass. The TCS pulses severely affected biofilms: they drastically reduced photosynthetic efficiency, the viability of bacteria and diatoms, and phosphate uptake. Latent consequences evidenced significant combined effects caused by the two stressors. The biofilms exposed only to TCS recovered far better than those subjected to both altered flow and subsequent TCS exposure: the latter suffered more persistent consequences, indicating that simulated drought amplified the toxicity of this compound. This finding has implications for river ecosystems, as it suggests that the toxicity of pollutants to biofilms may be exacerbated following a drought.
publishDate 2013
dc.date.none.fl_str_mv 2013-02
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/20924
Proia, L.; Vilches, Carolina; Boninneau, C.; Kantiani, L.; Farré, Maria Marcela; et al.; Drought episode modulates the response of river biofilms to Triclosan; Elsevier Science; Aquatic Toxicology; 127; 2-2013; 36-45
0166-445X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/20924
identifier_str_mv Proia, L.; Vilches, Carolina; Boninneau, C.; Kantiani, L.; Farré, Maria Marcela; et al.; Drought episode modulates the response of river biofilms to Triclosan; Elsevier Science; Aquatic Toxicology; 127; 2-2013; 36-45
0166-445X
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0166445X12000197
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.aquatox.2012.01.006
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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