Turbidity and dissolved organic matter as significant predictors of spatio-temporal dynamics of phosphorus in a large river-floodplain system

Autores
Mayora, Gisela Paola; Schneider, Berenice; Rossi, Andrea Silvana
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Phosphorus (P) inputs are increasing in river‐floodplain systems, but the factors whichinfluence the dynamics of this nutrient are not clear. To assess P dynamics in this kindof river, the main channel of the Middle Paraná River, 3 anabranches, 9 secondarychannels, and 20 lakes (7 permanently connected and 13 temporarily connected tothe fluvial system) were sampled. Multiple linear regressions were applied to explainspatio‐temporal patterns of P through commonly measured limnological variables.Particulate P increased during the sediment peak (evaluated through turbidity). Solublereactive P (SRP) was positively associated with dissolved organic matter (DOM,mainly the chromophoric fraction), which increased during high waters in the fluvialsystem but was highly variable in each kind of aquatic environment. In temporarilyconnected lakes, vegetated zones dominated by emergent macrophytes displayedthe highest SRP and chromophoric DOM concentrations. The flood and sedimentpeak positively affected P load in the river due to the increase in dissolved and particulatefractions, respectively. In addition, particle‐bound alkaline phosphatase activitywas positively associated with SRP concentration and load. These results suggest thatthe sediment peak incorporates particulate P in the system while the floodplain is a Psource during floods through exportation of the dissolved fraction. Dissolved P couldbe largely exported associated with DOM, which stimulates phosphatase biosynthesisby decreasing P bioavailability. The effect of aquatic macrophytes on P dynamicsseems to be influenced by DOM exudation. According to these considerations,DOM should be taken into account to analyse P dynamics in river‐floodplain systems.
Fil: Mayora, Gisela Paola. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto Nacional de Limnología. Universidad Nacional del Litoral. Instituto Nacional de Limnología; Argentina
Fil: Schneider, Berenice. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto Nacional de Limnología. Universidad Nacional del Litoral. Instituto Nacional de Limnología; Argentina
Fil: Rossi, Andrea Silvana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto Nacional de Limnología. Universidad Nacional del Litoral. Instituto Nacional de Limnología; Argentina
Materia
AQUATIC MACROPHYTES
CHROMOPHORIC DISSOLVED ORGANIC MATTER
HYDROSEDIMENTOLOGICAL REGIME
MIDDLE PARANÁ RIVER SYSTEM
PARTICLE-BOUND ALKALINE PHOSPHATASE ACTIVITY
SPATIO-TEMPORAL PATTERNS OF PHOSPHORUS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/88564
Acceder
id CONICETDig_aa7b61a2bd3ff3648317629859f8a0e4
oai_identifier_str oai:ri.conicet.gov.ar:11336/88564
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Turbidity and dissolved organic matter as significant predictors of spatio-temporal dynamics of phosphorus in a large river-floodplain systemMayora, Gisela PaolaSchneider, BereniceRossi, Andrea SilvanaAQUATIC MACROPHYTESCHROMOPHORIC DISSOLVED ORGANIC MATTERHYDROSEDIMENTOLOGICAL REGIMEMIDDLE PARANÁ RIVER SYSTEMPARTICLE-BOUND ALKALINE PHOSPHATASE ACTIVITYSPATIO-TEMPORAL PATTERNS OF PHOSPHORUShttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Phosphorus (P) inputs are increasing in river‐floodplain systems, but the factors whichinfluence the dynamics of this nutrient are not clear. To assess P dynamics in this kindof river, the main channel of the Middle Paraná River, 3 anabranches, 9 secondarychannels, and 20 lakes (7 permanently connected and 13 temporarily connected tothe fluvial system) were sampled. Multiple linear regressions were applied to explainspatio‐temporal patterns of P through commonly measured limnological variables.Particulate P increased during the sediment peak (evaluated through turbidity). Solublereactive P (SRP) was positively associated with dissolved organic matter (DOM,mainly the chromophoric fraction), which increased during high waters in the fluvialsystem but was highly variable in each kind of aquatic environment. In temporarilyconnected lakes, vegetated zones dominated by emergent macrophytes displayedthe highest SRP and chromophoric DOM concentrations. The flood and sedimentpeak positively affected P load in the river due to the increase in dissolved and particulatefractions, respectively. In addition, particle‐bound alkaline phosphatase activitywas positively associated with SRP concentration and load. These results suggest thatthe sediment peak incorporates particulate P in the system while the floodplain is a Psource during floods through exportation of the dissolved fraction. Dissolved P couldbe largely exported associated with DOM, which stimulates phosphatase biosynthesisby decreasing P bioavailability. The effect of aquatic macrophytes on P dynamicsseems to be influenced by DOM exudation. According to these considerations,DOM should be taken into account to analyse P dynamics in river‐floodplain systems.Fil: Mayora, Gisela Paola. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto Nacional de Limnología. Universidad Nacional del Litoral. Instituto Nacional de Limnología; ArgentinaFil: Schneider, Berenice. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto Nacional de Limnología. Universidad Nacional del Litoral. Instituto Nacional de Limnología; ArgentinaFil: Rossi, Andrea Silvana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto Nacional de Limnología. Universidad Nacional del Litoral. Instituto Nacional de Limnología; ArgentinaJohn Wiley & Sons Ltd2018-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/88564Mayora, Gisela Paola; Schneider, Berenice; Rossi, Andrea Silvana; Turbidity and dissolved organic matter as significant predictors of spatio-temporal dynamics of phosphorus in a large river-floodplain system; John Wiley & Sons Ltd; River Research And Applications; 34; 7; 9-2018; 629-6391535-1459CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://doi.wiley.com/10.1002/rra.3288info:eu-repo/semantics/altIdentifier/doi/10.1002/rra.3288info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:50:02Zoai:ri.conicet.gov.ar:11336/88564instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:50:02.927CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Turbidity and dissolved organic matter as significant predictors of spatio-temporal dynamics of phosphorus in a large river-floodplain system
title Turbidity and dissolved organic matter as significant predictors of spatio-temporal dynamics of phosphorus in a large river-floodplain system
spellingShingle Turbidity and dissolved organic matter as significant predictors of spatio-temporal dynamics of phosphorus in a large river-floodplain system
Mayora, Gisela Paola
AQUATIC MACROPHYTES
CHROMOPHORIC DISSOLVED ORGANIC MATTER
HYDROSEDIMENTOLOGICAL REGIME
MIDDLE PARANÁ RIVER SYSTEM
PARTICLE-BOUND ALKALINE PHOSPHATASE ACTIVITY
SPATIO-TEMPORAL PATTERNS OF PHOSPHORUS
title_short Turbidity and dissolved organic matter as significant predictors of spatio-temporal dynamics of phosphorus in a large river-floodplain system
title_full Turbidity and dissolved organic matter as significant predictors of spatio-temporal dynamics of phosphorus in a large river-floodplain system
title_fullStr Turbidity and dissolved organic matter as significant predictors of spatio-temporal dynamics of phosphorus in a large river-floodplain system
title_full_unstemmed Turbidity and dissolved organic matter as significant predictors of spatio-temporal dynamics of phosphorus in a large river-floodplain system
title_sort Turbidity and dissolved organic matter as significant predictors of spatio-temporal dynamics of phosphorus in a large river-floodplain system
dc.creator.none.fl_str_mv Mayora, Gisela Paola
Schneider, Berenice
Rossi, Andrea Silvana
author Mayora, Gisela Paola
author_facet Mayora, Gisela Paola
Schneider, Berenice
Rossi, Andrea Silvana
author_role author
author2 Schneider, Berenice
Rossi, Andrea Silvana
author2_role author
author
dc.subject.none.fl_str_mv AQUATIC MACROPHYTES
CHROMOPHORIC DISSOLVED ORGANIC MATTER
HYDROSEDIMENTOLOGICAL REGIME
MIDDLE PARANÁ RIVER SYSTEM
PARTICLE-BOUND ALKALINE PHOSPHATASE ACTIVITY
SPATIO-TEMPORAL PATTERNS OF PHOSPHORUS
topic AQUATIC MACROPHYTES
CHROMOPHORIC DISSOLVED ORGANIC MATTER
HYDROSEDIMENTOLOGICAL REGIME
MIDDLE PARANÁ RIVER SYSTEM
PARTICLE-BOUND ALKALINE PHOSPHATASE ACTIVITY
SPATIO-TEMPORAL PATTERNS OF PHOSPHORUS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Phosphorus (P) inputs are increasing in river‐floodplain systems, but the factors whichinfluence the dynamics of this nutrient are not clear. To assess P dynamics in this kindof river, the main channel of the Middle Paraná River, 3 anabranches, 9 secondarychannels, and 20 lakes (7 permanently connected and 13 temporarily connected tothe fluvial system) were sampled. Multiple linear regressions were applied to explainspatio‐temporal patterns of P through commonly measured limnological variables.Particulate P increased during the sediment peak (evaluated through turbidity). Solublereactive P (SRP) was positively associated with dissolved organic matter (DOM,mainly the chromophoric fraction), which increased during high waters in the fluvialsystem but was highly variable in each kind of aquatic environment. In temporarilyconnected lakes, vegetated zones dominated by emergent macrophytes displayedthe highest SRP and chromophoric DOM concentrations. The flood and sedimentpeak positively affected P load in the river due to the increase in dissolved and particulatefractions, respectively. In addition, particle‐bound alkaline phosphatase activitywas positively associated with SRP concentration and load. These results suggest thatthe sediment peak incorporates particulate P in the system while the floodplain is a Psource during floods through exportation of the dissolved fraction. Dissolved P couldbe largely exported associated with DOM, which stimulates phosphatase biosynthesisby decreasing P bioavailability. The effect of aquatic macrophytes on P dynamicsseems to be influenced by DOM exudation. According to these considerations,DOM should be taken into account to analyse P dynamics in river‐floodplain systems.
Fil: Mayora, Gisela Paola. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto Nacional de Limnología. Universidad Nacional del Litoral. Instituto Nacional de Limnología; Argentina
Fil: Schneider, Berenice. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto Nacional de Limnología. Universidad Nacional del Litoral. Instituto Nacional de Limnología; Argentina
Fil: Rossi, Andrea Silvana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto Nacional de Limnología. Universidad Nacional del Litoral. Instituto Nacional de Limnología; Argentina
description Phosphorus (P) inputs are increasing in river‐floodplain systems, but the factors whichinfluence the dynamics of this nutrient are not clear. To assess P dynamics in this kindof river, the main channel of the Middle Paraná River, 3 anabranches, 9 secondarychannels, and 20 lakes (7 permanently connected and 13 temporarily connected tothe fluvial system) were sampled. Multiple linear regressions were applied to explainspatio‐temporal patterns of P through commonly measured limnological variables.Particulate P increased during the sediment peak (evaluated through turbidity). Solublereactive P (SRP) was positively associated with dissolved organic matter (DOM,mainly the chromophoric fraction), which increased during high waters in the fluvialsystem but was highly variable in each kind of aquatic environment. In temporarilyconnected lakes, vegetated zones dominated by emergent macrophytes displayedthe highest SRP and chromophoric DOM concentrations. The flood and sedimentpeak positively affected P load in the river due to the increase in dissolved and particulatefractions, respectively. In addition, particle‐bound alkaline phosphatase activitywas positively associated with SRP concentration and load. These results suggest thatthe sediment peak incorporates particulate P in the system while the floodplain is a Psource during floods through exportation of the dissolved fraction. Dissolved P couldbe largely exported associated with DOM, which stimulates phosphatase biosynthesisby decreasing P bioavailability. The effect of aquatic macrophytes on P dynamicsseems to be influenced by DOM exudation. According to these considerations,DOM should be taken into account to analyse P dynamics in river‐floodplain systems.
publishDate 2018
dc.date.none.fl_str_mv 2018-09
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/88564
Mayora, Gisela Paola; Schneider, Berenice; Rossi, Andrea Silvana; Turbidity and dissolved organic matter as significant predictors of spatio-temporal dynamics of phosphorus in a large river-floodplain system; John Wiley & Sons Ltd; River Research And Applications; 34; 7; 9-2018; 629-639
1535-1459
CONICET Digital
CONICET
url http://hdl.handle.net/11336/88564
identifier_str_mv Mayora, Gisela Paola; Schneider, Berenice; Rossi, Andrea Silvana; Turbidity and dissolved organic matter as significant predictors of spatio-temporal dynamics of phosphorus in a large river-floodplain system; John Wiley & Sons Ltd; River Research And Applications; 34; 7; 9-2018; 629-639
1535-1459
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://doi.wiley.com/10.1002/rra.3288
info:eu-repo/semantics/altIdentifier/doi/10.1002/rra.3288
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv John Wiley & Sons Ltd
publisher.none.fl_str_mv John Wiley & Sons Ltd
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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