Ecotoxicological tools to assess the impact pollution of tributaries to the Alqueva Reservoir (Southern Portugal)

Detalhes bibliográficos
Autor(a) principal: Palma, Patrícia
Data de Publicação: 2018
Outros Autores: Fialho, Sofia, Lima, Ana, Penha, Alexandra, Novais, Maria Helena, Monllor-Alcaraz, Luis Simon, Guillem-Argiles, Nuria, López de Alda, Miren, Alvarenga, Paula, Morais, Manuela, Salgado, Rui
Tipo de documento: Artigo de conferência
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10174/25494
Resumo: Degradation of surface waters and biodiversity loss at different spatial and temporal scales occurs through multiple stressors whose effects are difficult to separate and identify. Efficient management of water bodies depends on the development and selection of robust, sensitive and easily applicable tools that allow prioritizing the pressures and stressors that act in a basin, and mitigate their effects. The Alqueva reservoir constitutes the most important water supply source in southern Portugal, a semi-arid region with high levels of water scarcity and where agriculture is one of the main activities. The aim of the present study was to assess the use of an ecotoxicological tool-box in tributaries of the Alqueva reservoir for detecting chemical alterations that may influence the water quality of the reservoir. Water samples were collected along 2017 at four tributaries of Alqueva (streams of Zebro, Álamos, Amieira and Lucefécit) and analyzed for: (i) physical chemical support elements (pH, temperature, dissolved oxygen, conductivity, chloride, total phosphorus, Kjeldahl nitrogen, ammonium, nitrite, nitrate, BOD, COD), (ii) hazardous substances (pesticides), and (iii) ecotoxicological endpoints, using bioindicators representing different trophic levels (Vibrio fischeri, Thamnocephalus platyurus, Daphnia magna). In general, Zebro and Lucefécit presented concentrations of BOD (Zebro: 4.0-35.5 mg L-1; Lucefécit: 2.3-7.5 mg L-1) and total phosphorus (Zebro: 0.18-6.23 mg L-1; Lucefécit: 0.02-1.92 mg L-1) that compromise the support of biological life, with regard to nutrient and oxygenation conditions. As regards pesticides, the concentrations detected were low, being bentazone the compound quantified at highest levels. Lucefécit was the tributary that presented higher concentrations of pesticides (with values of bentazone of 1.94 µg L-1), probably due to the intensive agriculture crops around it. Concerning to ecotoxicological analysis, the results highlighted the toxicity in sublethal parameters (reproduction, feed inhibition or growth inhibition) induced, mainly, by samples from Zebro and Lucefécit streams. So, the results from the ecotoxicological tool-box allowed identifying the streams that promote a higher chemical impact to the reservoir, which is essential to delineate management actions to improve the water quality of the reservoir.
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spelling Ecotoxicological tools to assess the impact pollution of tributaries to the Alqueva Reservoir (Southern Portugal)Alqueva tributariespesticidesecotoxicological assessmentecological statusDegradation of surface waters and biodiversity loss at different spatial and temporal scales occurs through multiple stressors whose effects are difficult to separate and identify. Efficient management of water bodies depends on the development and selection of robust, sensitive and easily applicable tools that allow prioritizing the pressures and stressors that act in a basin, and mitigate their effects. The Alqueva reservoir constitutes the most important water supply source in southern Portugal, a semi-arid region with high levels of water scarcity and where agriculture is one of the main activities. The aim of the present study was to assess the use of an ecotoxicological tool-box in tributaries of the Alqueva reservoir for detecting chemical alterations that may influence the water quality of the reservoir. Water samples were collected along 2017 at four tributaries of Alqueva (streams of Zebro, Álamos, Amieira and Lucefécit) and analyzed for: (i) physical chemical support elements (pH, temperature, dissolved oxygen, conductivity, chloride, total phosphorus, Kjeldahl nitrogen, ammonium, nitrite, nitrate, BOD, COD), (ii) hazardous substances (pesticides), and (iii) ecotoxicological endpoints, using bioindicators representing different trophic levels (Vibrio fischeri, Thamnocephalus platyurus, Daphnia magna). In general, Zebro and Lucefécit presented concentrations of BOD (Zebro: 4.0-35.5 mg L-1; Lucefécit: 2.3-7.5 mg L-1) and total phosphorus (Zebro: 0.18-6.23 mg L-1; Lucefécit: 0.02-1.92 mg L-1) that compromise the support of biological life, with regard to nutrient and oxygenation conditions. As regards pesticides, the concentrations detected were low, being bentazone the compound quantified at highest levels. Lucefécit was the tributary that presented higher concentrations of pesticides (with values of bentazone of 1.94 µg L-1), probably due to the intensive agriculture crops around it. Concerning to ecotoxicological analysis, the results highlighted the toxicity in sublethal parameters (reproduction, feed inhibition or growth inhibition) induced, mainly, by samples from Zebro and Lucefécit streams. So, the results from the ecotoxicological tool-box allowed identifying the streams that promote a higher chemical impact to the reservoir, which is essential to delineate management actions to improve the water quality of the reservoir.This work was co-funded by the European Union through the European Regional Development Fund, framed in COMPETE 2020 (Operational Programme Competitiveness and Internationalization), through the ICT project (UID/GEO/04683/2013) with reference POCI-01-0145-FEDER-007690 and the ALOP project (ALT20-03-0145-FEDER-000004)28th Annual Meeting of the Society of Environmental Toxicology and Chemistry- Europe, Rome, Italy2019-04-24T14:56:26Z2019-04-242018-05-13T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjecthttp://hdl.handle.net/10174/25494http://hdl.handle.net/10174/25494eng28th Annual Meeting of the Society of Environmental Toxicology and Chemistry- Europe, Rome, Italy, 13-17 May 2018 Palma P., Fialho S., Lima A., Penha A., Novais M.H., Monllor-Alcaraz L.S., Guillem-Argiles N., Lopez de Alda M., Alvarenga P., Morais M. & Salgado R. “Ecotoxicological tools to assess the impact pollution of tributaries to the Alqueva Reservoir (Southern Portugal)”naonaosimppalma@ipbeja.ptsofiafialho16@gmail.comana.filipa.lima89@gmail.commapenha@uevora.pthnovais@uevora.ptsmaqam@cid.csic.esnuria.guillem@cid.csic.esmiren.lopezdealda@idaea.csic.espaula.alvarenga@ipbeja.ptmmorais@uevora.ptrsal@uevora.pt592Palma, PatríciaFialho, SofiaLima, AnaPenha, AlexandraNovais, Maria HelenaMonllor-Alcaraz, Luis SimonGuillem-Argiles, NuriaLópez de Alda, MirenAlvarenga, PaulaMorais, ManuelaSalgado, Ruiinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-01-03T19:19:20Zoai:dspace.uevora.pt:10174/25494Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:15:55.533564Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Ecotoxicological tools to assess the impact pollution of tributaries to the Alqueva Reservoir (Southern Portugal)
title Ecotoxicological tools to assess the impact pollution of tributaries to the Alqueva Reservoir (Southern Portugal)
spellingShingle Ecotoxicological tools to assess the impact pollution of tributaries to the Alqueva Reservoir (Southern Portugal)
Palma, Patrícia
Alqueva tributaries
pesticides
ecotoxicological assessment
ecological status
title_short Ecotoxicological tools to assess the impact pollution of tributaries to the Alqueva Reservoir (Southern Portugal)
title_full Ecotoxicological tools to assess the impact pollution of tributaries to the Alqueva Reservoir (Southern Portugal)
title_fullStr Ecotoxicological tools to assess the impact pollution of tributaries to the Alqueva Reservoir (Southern Portugal)
title_full_unstemmed Ecotoxicological tools to assess the impact pollution of tributaries to the Alqueva Reservoir (Southern Portugal)
title_sort Ecotoxicological tools to assess the impact pollution of tributaries to the Alqueva Reservoir (Southern Portugal)
author Palma, Patrícia
author_facet Palma, Patrícia
Fialho, Sofia
Lima, Ana
Penha, Alexandra
Novais, Maria Helena
Monllor-Alcaraz, Luis Simon
Guillem-Argiles, Nuria
López de Alda, Miren
Alvarenga, Paula
Morais, Manuela
Salgado, Rui
author_role author
author2 Fialho, Sofia
Lima, Ana
Penha, Alexandra
Novais, Maria Helena
Monllor-Alcaraz, Luis Simon
Guillem-Argiles, Nuria
López de Alda, Miren
Alvarenga, Paula
Morais, Manuela
Salgado, Rui
author2_role author
author
author
author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Palma, Patrícia
Fialho, Sofia
Lima, Ana
Penha, Alexandra
Novais, Maria Helena
Monllor-Alcaraz, Luis Simon
Guillem-Argiles, Nuria
López de Alda, Miren
Alvarenga, Paula
Morais, Manuela
Salgado, Rui
dc.subject.por.fl_str_mv Alqueva tributaries
pesticides
ecotoxicological assessment
ecological status
topic Alqueva tributaries
pesticides
ecotoxicological assessment
ecological status
description Degradation of surface waters and biodiversity loss at different spatial and temporal scales occurs through multiple stressors whose effects are difficult to separate and identify. Efficient management of water bodies depends on the development and selection of robust, sensitive and easily applicable tools that allow prioritizing the pressures and stressors that act in a basin, and mitigate their effects. The Alqueva reservoir constitutes the most important water supply source in southern Portugal, a semi-arid region with high levels of water scarcity and where agriculture is one of the main activities. The aim of the present study was to assess the use of an ecotoxicological tool-box in tributaries of the Alqueva reservoir for detecting chemical alterations that may influence the water quality of the reservoir. Water samples were collected along 2017 at four tributaries of Alqueva (streams of Zebro, Álamos, Amieira and Lucefécit) and analyzed for: (i) physical chemical support elements (pH, temperature, dissolved oxygen, conductivity, chloride, total phosphorus, Kjeldahl nitrogen, ammonium, nitrite, nitrate, BOD, COD), (ii) hazardous substances (pesticides), and (iii) ecotoxicological endpoints, using bioindicators representing different trophic levels (Vibrio fischeri, Thamnocephalus platyurus, Daphnia magna). In general, Zebro and Lucefécit presented concentrations of BOD (Zebro: 4.0-35.5 mg L-1; Lucefécit: 2.3-7.5 mg L-1) and total phosphorus (Zebro: 0.18-6.23 mg L-1; Lucefécit: 0.02-1.92 mg L-1) that compromise the support of biological life, with regard to nutrient and oxygenation conditions. As regards pesticides, the concentrations detected were low, being bentazone the compound quantified at highest levels. Lucefécit was the tributary that presented higher concentrations of pesticides (with values of bentazone of 1.94 µg L-1), probably due to the intensive agriculture crops around it. Concerning to ecotoxicological analysis, the results highlighted the toxicity in sublethal parameters (reproduction, feed inhibition or growth inhibition) induced, mainly, by samples from Zebro and Lucefécit streams. So, the results from the ecotoxicological tool-box allowed identifying the streams that promote a higher chemical impact to the reservoir, which is essential to delineate management actions to improve the water quality of the reservoir.
publishDate 2018
dc.date.none.fl_str_mv 2018-05-13T00:00:00Z
2019-04-24T14:56:26Z
2019-04-24
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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format conferenceObject
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10174/25494
http://hdl.handle.net/10174/25494
url http://hdl.handle.net/10174/25494
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 28th Annual Meeting of the Society of Environmental Toxicology and Chemistry- Europe, Rome, Italy, 13-17 May 2018 Palma P., Fialho S., Lima A., Penha A., Novais M.H., Monllor-Alcaraz L.S., Guillem-Argiles N., Lopez de Alda M., Alvarenga P., Morais M. & Salgado R. “Ecotoxicological tools to assess the impact pollution of tributaries to the Alqueva Reservoir (Southern Portugal)”
nao
nao
sim
ppalma@ipbeja.pt
sofiafialho16@gmail.com
ana.filipa.lima89@gmail.com
mapenha@uevora.pt
hnovais@uevora.pt
smaqam@cid.csic.es
nuria.guillem@cid.csic.es
miren.lopezdealda@idaea.csic.es
paula.alvarenga@ipbeja.pt
mmorais@uevora.pt
rsal@uevora.pt
592
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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dc.publisher.none.fl_str_mv 28th Annual Meeting of the Society of Environmental Toxicology and Chemistry- Europe, Rome, Italy
publisher.none.fl_str_mv 28th Annual Meeting of the Society of Environmental Toxicology and Chemistry- Europe, Rome, Italy
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instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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