Tolerance to Copper and to Salinity in Daphnia longispina: Implications within a Climate Change Scenario
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10316/25679 https://doi.org/10.1371/journal.pone.0068702 |
Resumo: | Considering IPPC climate change scenarios, it is pertinent to predict situations where coastal ecosystems already impacted with chemical contamination became exposed to an additional stressor under a future scenario of seawater intrusion. Accordingly, the present study aimed at evaluating if a negative association between tolerance to a metal and to saltwater exists among genotypes of a freshwater organism. For this, five clonal lineages of the cladoceran Daphnia longispina O.F. Mu¨ ller, exhibiting a differential tolerance to lethal levels of copper, were selected. Each clonal lineage was exposed to lethal and sublethal concentrations of sodium chloride (assumed as a protective surrogate to evaluate the toxicity of increased salinity to freshwater organisms). Mortality, time to release the first brood and total number of neonates per female were monitored and the somatic growth rate and intrinsic rate of natural increase were computed for each clonal lineage. Data here obtained were compared with their lethal responses to copper and significant negative correlations were found. These results suggest that genetically eroded populations of D. longispina, due to copper or salinity, may be particularly susceptible to a later exposure to the other contaminant supporting the multiple stressors differential tolerance. |
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Tolerance to Copper and to Salinity in Daphnia longispina: Implications within a Climate Change ScenarioConsidering IPPC climate change scenarios, it is pertinent to predict situations where coastal ecosystems already impacted with chemical contamination became exposed to an additional stressor under a future scenario of seawater intrusion. Accordingly, the present study aimed at evaluating if a negative association between tolerance to a metal and to saltwater exists among genotypes of a freshwater organism. For this, five clonal lineages of the cladoceran Daphnia longispina O.F. Mu¨ ller, exhibiting a differential tolerance to lethal levels of copper, were selected. Each clonal lineage was exposed to lethal and sublethal concentrations of sodium chloride (assumed as a protective surrogate to evaluate the toxicity of increased salinity to freshwater organisms). Mortality, time to release the first brood and total number of neonates per female were monitored and the somatic growth rate and intrinsic rate of natural increase were computed for each clonal lineage. Data here obtained were compared with their lethal responses to copper and significant negative correlations were found. These results suggest that genetically eroded populations of D. longispina, due to copper or salinity, may be particularly susceptible to a later exposure to the other contaminant supporting the multiple stressors differential tolerance.This work has been developed under the scope of the Portuguese Science Foundation (FCT, Portugal) through FSE and POPH funds (Programa Ciencia 2007), and FEDER through COMPETE-programa Operacional Factores de Competitividade (research project FCOMP-01-0124-FEDER-014016; PTDC/AAC-CLI/ 111706/2009).Harald Auge, Helmholtz Centre for Environmental Research – UFZ, Germany2013info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/25679http://hdl.handle.net/10316/25679https://doi.org/10.1371/journal.pone.0068702enghttp://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0068702Leitão, JoãoRibeiro, R.Soares, Amadeu M. V. M.Lopes, I.info: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:RCAAP2021-10-29T10:16:36Zoai:estudogeral.uc.pt:10316/25679Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:56:04.387127Repositório 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 |
Tolerance to Copper and to Salinity in Daphnia longispina: Implications within a Climate Change Scenario |
title |
Tolerance to Copper and to Salinity in Daphnia longispina: Implications within a Climate Change Scenario |
spellingShingle |
Tolerance to Copper and to Salinity in Daphnia longispina: Implications within a Climate Change Scenario Leitão, João |
title_short |
Tolerance to Copper and to Salinity in Daphnia longispina: Implications within a Climate Change Scenario |
title_full |
Tolerance to Copper and to Salinity in Daphnia longispina: Implications within a Climate Change Scenario |
title_fullStr |
Tolerance to Copper and to Salinity in Daphnia longispina: Implications within a Climate Change Scenario |
title_full_unstemmed |
Tolerance to Copper and to Salinity in Daphnia longispina: Implications within a Climate Change Scenario |
title_sort |
Tolerance to Copper and to Salinity in Daphnia longispina: Implications within a Climate Change Scenario |
author |
Leitão, João |
author_facet |
Leitão, João Ribeiro, R. Soares, Amadeu M. V. M. Lopes, I. |
author_role |
author |
author2 |
Ribeiro, R. Soares, Amadeu M. V. M. Lopes, I. |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Leitão, João Ribeiro, R. Soares, Amadeu M. V. M. Lopes, I. |
description |
Considering IPPC climate change scenarios, it is pertinent to predict situations where coastal ecosystems already impacted with chemical contamination became exposed to an additional stressor under a future scenario of seawater intrusion. Accordingly, the present study aimed at evaluating if a negative association between tolerance to a metal and to saltwater exists among genotypes of a freshwater organism. For this, five clonal lineages of the cladoceran Daphnia longispina O.F. Mu¨ ller, exhibiting a differential tolerance to lethal levels of copper, were selected. Each clonal lineage was exposed to lethal and sublethal concentrations of sodium chloride (assumed as a protective surrogate to evaluate the toxicity of increased salinity to freshwater organisms). Mortality, time to release the first brood and total number of neonates per female were monitored and the somatic growth rate and intrinsic rate of natural increase were computed for each clonal lineage. Data here obtained were compared with their lethal responses to copper and significant negative correlations were found. These results suggest that genetically eroded populations of D. longispina, due to copper or salinity, may be particularly susceptible to a later exposure to the other contaminant supporting the multiple stressors differential tolerance. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10316/25679 http://hdl.handle.net/10316/25679 https://doi.org/10.1371/journal.pone.0068702 |
url |
http://hdl.handle.net/10316/25679 https://doi.org/10.1371/journal.pone.0068702 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0068702 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Harald Auge, Helmholtz Centre for Environmental Research – UFZ, Germany |
publisher.none.fl_str_mv |
Harald Auge, Helmholtz Centre for Environmental Research – UFZ, Germany |
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 |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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