Dual role of DOM in a scenario of global change on photosynthesis and structure of coastal phytoplankton from the South Atlantic Ocean
We evaluated the dual role of DOM (i.e., as a source of inorganic nutrients and as an absorber of solar radiation) on a phytoplankton community of the western South Atlantic Ocean. Using a combination of microcosms and a cluster approach, we simulated the future conditions of some variables that are...
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ftconicet:oai:ri.conicet.gov.ar:11336/90854 2023-10-09T21:55:56+02:00 Dual role of DOM in a scenario of global change on photosynthesis and structure of coastal phytoplankton from the South Atlantic Ocean Villafañe, Virginia Estela Paczkowska, Joanna Marianna Andersson, Agneta Durán Romero, Cristina Valiñas, Macarena Soledad Helbling, Eduardo Walter application/pdf http://hdl.handle.net/11336/90854 eng eng Elsevier info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0048969718312919 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.scitotenv.2018.04.121 http://hdl.handle.net/11336/90854 Villafañe, Virginia Estela; Paczkowska, Joanna Marianna; Andersson, Agneta; Durán Romero, Cristina; Valiñas, Macarena Soledad; et al.; Dual role of DOM in a scenario of global change on photosynthesis and structure of coastal phytoplankton from the South Atlantic Ocean; Elsevier; Science of the Total Environment; 634; 9-2018; 1352-1361 0048-9697 CONICET Digital CONICET info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ ACIDIFICATION DISSOLVED ORGANIC MATTER NUTRIENTS OXYGEN EVOLUTION PHOTOSYNTHESIS ULTRAVIOLET RADIATION https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1016/j.scitotenv.2018.04.121 2023-09-24T18:49:12Z We evaluated the dual role of DOM (i.e., as a source of inorganic nutrients and as an absorber of solar radiation) on a phytoplankton community of the western South Atlantic Ocean. Using a combination of microcosms and a cluster approach, we simulated the future conditions of some variables that are highly influenced by global change in the region. We increased nutrients (i.e., anthropogenic input) and dissolved organic matter (DOM), and we decreased the pH, to assess their combined impact on growth rates (μ), species composition/abundance and size structure, and photosynthesis (considering in this later also the effects of light quality i.e., with and without ultraviolet radiation). We simulated two Future conditions (Fut) where nutrients and pH were similarly manipulated, but in one the physical role of DOM (Futout) was assessed whereas in the other (Futin) the physico-chemical role was evaluated; these conditions were compared with a control (Present condition, Pres). The μ significantly increased in both Fut conditions as compared to the Pres, probably due to the nutrient addition and acidification in the former. The highest μ were observed in the Futout, due to the growth of nanoplanktonic flagellates and diatoms. Cells in the Futin were photosynthetically less efficient as compared to those of the Futout and Pres, but these physiological differences, also between samples with or without solar UVR observed at the beginning of the experiment, decreased with time hinting for an acclimation process. The knowledge of the relative importance of both roles of DOM is especially important for coastal areas that are expected to receive higher inputs and will be more acidified in the future. Fil: Villafañe, Virginia Estela. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Paczkowska, Joanna Marianna. Universidad de Umea; Suecia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Andersson, ... Article in Journal/Newspaper South Atlantic Ocean CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Argentina Suecia ENVELOPE(-62.617,-62.617,-66.733,-66.733) Science of The Total Environment 634 1352 1361 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
ACIDIFICATION DISSOLVED ORGANIC MATTER NUTRIENTS OXYGEN EVOLUTION PHOTOSYNTHESIS ULTRAVIOLET RADIATION https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
spellingShingle |
ACIDIFICATION DISSOLVED ORGANIC MATTER NUTRIENTS OXYGEN EVOLUTION PHOTOSYNTHESIS ULTRAVIOLET RADIATION https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 Villafañe, Virginia Estela Paczkowska, Joanna Marianna Andersson, Agneta Durán Romero, Cristina Valiñas, Macarena Soledad Helbling, Eduardo Walter Dual role of DOM in a scenario of global change on photosynthesis and structure of coastal phytoplankton from the South Atlantic Ocean |
topic_facet |
ACIDIFICATION DISSOLVED ORGANIC MATTER NUTRIENTS OXYGEN EVOLUTION PHOTOSYNTHESIS ULTRAVIOLET RADIATION https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
description |
We evaluated the dual role of DOM (i.e., as a source of inorganic nutrients and as an absorber of solar radiation) on a phytoplankton community of the western South Atlantic Ocean. Using a combination of microcosms and a cluster approach, we simulated the future conditions of some variables that are highly influenced by global change in the region. We increased nutrients (i.e., anthropogenic input) and dissolved organic matter (DOM), and we decreased the pH, to assess their combined impact on growth rates (μ), species composition/abundance and size structure, and photosynthesis (considering in this later also the effects of light quality i.e., with and without ultraviolet radiation). We simulated two Future conditions (Fut) where nutrients and pH were similarly manipulated, but in one the physical role of DOM (Futout) was assessed whereas in the other (Futin) the physico-chemical role was evaluated; these conditions were compared with a control (Present condition, Pres). The μ significantly increased in both Fut conditions as compared to the Pres, probably due to the nutrient addition and acidification in the former. The highest μ were observed in the Futout, due to the growth of nanoplanktonic flagellates and diatoms. Cells in the Futin were photosynthetically less efficient as compared to those of the Futout and Pres, but these physiological differences, also between samples with or without solar UVR observed at the beginning of the experiment, decreased with time hinting for an acclimation process. The knowledge of the relative importance of both roles of DOM is especially important for coastal areas that are expected to receive higher inputs and will be more acidified in the future. Fil: Villafañe, Virginia Estela. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Paczkowska, Joanna Marianna. Universidad de Umea; Suecia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Andersson, ... |
format |
Article in Journal/Newspaper |
author |
Villafañe, Virginia Estela Paczkowska, Joanna Marianna Andersson, Agneta Durán Romero, Cristina Valiñas, Macarena Soledad Helbling, Eduardo Walter |
author_facet |
Villafañe, Virginia Estela Paczkowska, Joanna Marianna Andersson, Agneta Durán Romero, Cristina Valiñas, Macarena Soledad Helbling, Eduardo Walter |
author_sort |
Villafañe, Virginia Estela |
title |
Dual role of DOM in a scenario of global change on photosynthesis and structure of coastal phytoplankton from the South Atlantic Ocean |
title_short |
Dual role of DOM in a scenario of global change on photosynthesis and structure of coastal phytoplankton from the South Atlantic Ocean |
title_full |
Dual role of DOM in a scenario of global change on photosynthesis and structure of coastal phytoplankton from the South Atlantic Ocean |
title_fullStr |
Dual role of DOM in a scenario of global change on photosynthesis and structure of coastal phytoplankton from the South Atlantic Ocean |
title_full_unstemmed |
Dual role of DOM in a scenario of global change on photosynthesis and structure of coastal phytoplankton from the South Atlantic Ocean |
title_sort |
dual role of dom in a scenario of global change on photosynthesis and structure of coastal phytoplankton from the south atlantic ocean |
publisher |
Elsevier |
url |
http://hdl.handle.net/11336/90854 |
long_lat |
ENVELOPE(-62.617,-62.617,-66.733,-66.733) |
geographic |
Argentina Suecia |
geographic_facet |
Argentina Suecia |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_relation |
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0048969718312919 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.scitotenv.2018.04.121 http://hdl.handle.net/11336/90854 Villafañe, Virginia Estela; Paczkowska, Joanna Marianna; Andersson, Agneta; Durán Romero, Cristina; Valiñas, Macarena Soledad; et al.; Dual role of DOM in a scenario of global change on photosynthesis and structure of coastal phytoplankton from the South Atlantic Ocean; Elsevier; Science of the Total Environment; 634; 9-2018; 1352-1361 0048-9697 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ |
op_doi |
https://doi.org/10.1016/j.scitotenv.2018.04.121 |
container_title |
Science of The Total Environment |
container_volume |
634 |
container_start_page |
1352 |
op_container_end_page |
1361 |
_version_ |
1779320184107958272 |