Combined effects of water temperature and nutrients concentration on periphyton respiration - implications of global change
Autor(a) principal: | |
---|---|
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/10316/98696 https://doi.org/10.1002/iroh.201201510 |
Resumo: | With the increase in global mean surface temperature predicted for the near future, stream water temperature will also increase. Simultaneously, water quality is likely to decrease (e.g., due to increases in nutrient and pollutant concentrations). The objective of this study was to evaluate the individual and combined effects of increases in water temperature and nutrients concentration on periphyton respiration, as a surrogate for stream metabolism. Stones naturally colonized with periphyton in an unpolluted mountain stream in Central Portugal were sampled seasonally over a year, and incubated in the laboratory under two water temperatures (ambient and 4°C elevated) and two nutrients concentration levels (ambient and 6 higher inorganic dissolved nitrogen, 2 higher soluble reactive phosphorous concentrations). Overall, increases in water temperature stimulated periphyton respiration to a larger extent than did increases in nutrients concentration. In spring, the simultaneous increase in water temperature and nutrients concentration stimulated periphyton respiration beyond expected from the individual effect of each factor. These results indicate that synergistic interactions between factors might occur under certain environmental conditions, suggesting that care should be taken when predicting the combined effect of changes in multiple factors from their individual effects. The observed stimulation of periphyton respiration promoted by increased temperature and nutrients concentration can lead to changes in streams carbon budgets, with a positive feedback for global warming, as more CO2 might be released to the atmosphere. |
id |
RCAP_daee523756949af31c32414b7a3b1c0b |
---|---|
oai_identifier_str |
oai:estudogeral.uc.pt:10316/98696 |
network_acronym_str |
RCAP |
network_name_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository_id_str |
7160 |
spelling |
Combined effects of water temperature and nutrients concentration on periphyton respiration - implications of global changeGlobal changesMetabolismStreamSynergistic effectsWith the increase in global mean surface temperature predicted for the near future, stream water temperature will also increase. Simultaneously, water quality is likely to decrease (e.g., due to increases in nutrient and pollutant concentrations). The objective of this study was to evaluate the individual and combined effects of increases in water temperature and nutrients concentration on periphyton respiration, as a surrogate for stream metabolism. Stones naturally colonized with periphyton in an unpolluted mountain stream in Central Portugal were sampled seasonally over a year, and incubated in the laboratory under two water temperatures (ambient and 4°C elevated) and two nutrients concentration levels (ambient and 6 higher inorganic dissolved nitrogen, 2 higher soluble reactive phosphorous concentrations). Overall, increases in water temperature stimulated periphyton respiration to a larger extent than did increases in nutrients concentration. In spring, the simultaneous increase in water temperature and nutrients concentration stimulated periphyton respiration beyond expected from the individual effect of each factor. These results indicate that synergistic interactions between factors might occur under certain environmental conditions, suggesting that care should be taken when predicting the combined effect of changes in multiple factors from their individual effects. The observed stimulation of periphyton respiration promoted by increased temperature and nutrients concentration can lead to changes in streams carbon budgets, with a positive feedback for global warming, as more CO2 might be released to the atmosphere.3F10-AC72-52D0 | Verónica Ferreirainfo:eu-repo/semantics/publishedVersion2013info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/98696http://hdl.handle.net/10316/98696https://doi.org/10.1002/iroh.201201510eng2-s2.0-84874044418cv-prod-702512Rosa, JoãoFerreira, VerónicaCanhoto, CristinaGraça, Manuel A.S.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:RCAAP2022-02-09T11:03:02Zoai:estudogeral.uc.pt:10316/98696Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:16:27.359185Repositório 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 |
Combined effects of water temperature and nutrients concentration on periphyton respiration - implications of global change |
title |
Combined effects of water temperature and nutrients concentration on periphyton respiration - implications of global change |
spellingShingle |
Combined effects of water temperature and nutrients concentration on periphyton respiration - implications of global change Rosa, João Global changes Metabolism Stream Synergistic effects |
title_short |
Combined effects of water temperature and nutrients concentration on periphyton respiration - implications of global change |
title_full |
Combined effects of water temperature and nutrients concentration on periphyton respiration - implications of global change |
title_fullStr |
Combined effects of water temperature and nutrients concentration on periphyton respiration - implications of global change |
title_full_unstemmed |
Combined effects of water temperature and nutrients concentration on periphyton respiration - implications of global change |
title_sort |
Combined effects of water temperature and nutrients concentration on periphyton respiration - implications of global change |
author |
Rosa, João |
author_facet |
Rosa, João Ferreira, Verónica Canhoto, Cristina Graça, Manuel A.S. |
author_role |
author |
author2 |
Ferreira, Verónica Canhoto, Cristina Graça, Manuel A.S. |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Rosa, João Ferreira, Verónica Canhoto, Cristina Graça, Manuel A.S. |
dc.subject.por.fl_str_mv |
Global changes Metabolism Stream Synergistic effects |
topic |
Global changes Metabolism Stream Synergistic effects |
description |
With the increase in global mean surface temperature predicted for the near future, stream water temperature will also increase. Simultaneously, water quality is likely to decrease (e.g., due to increases in nutrient and pollutant concentrations). The objective of this study was to evaluate the individual and combined effects of increases in water temperature and nutrients concentration on periphyton respiration, as a surrogate for stream metabolism. Stones naturally colonized with periphyton in an unpolluted mountain stream in Central Portugal were sampled seasonally over a year, and incubated in the laboratory under two water temperatures (ambient and 4°C elevated) and two nutrients concentration levels (ambient and 6 higher inorganic dissolved nitrogen, 2 higher soluble reactive phosphorous concentrations). Overall, increases in water temperature stimulated periphyton respiration to a larger extent than did increases in nutrients concentration. In spring, the simultaneous increase in water temperature and nutrients concentration stimulated periphyton respiration beyond expected from the individual effect of each factor. These results indicate that synergistic interactions between factors might occur under certain environmental conditions, suggesting that care should be taken when predicting the combined effect of changes in multiple factors from their individual effects. The observed stimulation of periphyton respiration promoted by increased temperature and nutrients concentration can lead to changes in streams carbon budgets, with a positive feedback for global warming, as more CO2 might be released to the atmosphere. |
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/10316/98696 http://hdl.handle.net/10316/98696 https://doi.org/10.1002/iroh.201201510 |
url |
http://hdl.handle.net/10316/98696 https://doi.org/10.1002/iroh.201201510 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
2-s2.0-84874044418 cv-prod-702512 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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 |
|
_version_ |
1799134060714393600 |