Ecotoxicological tools to assess the impact pollution of tributaries to the Alqueva Reservoir (Southern Portugal)
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , , , , , , , |
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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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 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/conferenceObject |
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 |
eu_rights_str_mv |
openAccess |
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 |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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 |
repository.mail.fl_str_mv |
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1799136640942211072 |