Diel variations of nutrient retention and metabolism are coupled for ammonium but not for phosphorus in a lowland stream

Este artículo contiene 13 páginas, 3 tablas, 4 figuras

Detalles Bibliográficos
Autores: Martí, Eugènia, Feijoó, Claudia, Vilches, Carolina, Ferreiro, Nicolás, Gantes, Patricia, Ranieri, Constanza, Torremorell, Ana, Rodríguez Castro, María Carolina, Gultemiriam, María Lourdes, Giorgi, Adonis, Sabater, Francesc
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2020
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/211483
Acceso en línea:http://hdl.handle.net/10261/211483
Access Level:acceso abierto
Palabra clave:Nitrification .
Pampean streams
Nutrient uptake
Nitrogen
Phosphorus
Macrophytes
Biofilms
Metabolism
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spelling Diel variations of nutrient retention and metabolism are coupled for ammonium but not for phosphorus in a lowland streamMartí, EugèniaFeijoó, ClaudiaVilches, CarolinaFerreiro, NicolásGantes, PatriciaRanieri, ConstanzaTorremorell, AnaRodríguez Castro, María CarolinaGultemiriam, María LourdesGiorgi, AdonisSabater, FrancescNitrification .Pampean streamsNutrient uptakeNitrogenPhosphorusMacrophytesBiofilmsMetabolismEste artículo contiene 13 páginas, 3 tablas, 4 figurasIn-stream nutrient retention is an important ecosystem function because it can regulate nutrient fate and export to downstream ecosystems. Temporal variation in nutrient retention in streams has been studied extensively at the annual and seasonal scale but less thoroughly at the diel scale. However, understanding temporal variability in nutrient uptake at the diel scale can increase understanding of the role of photoautotrophic primary production on nutrient uptake in streams, especially open-canopy streams. We hypothesized that nutrient retention mostly depends on autotrophic demand in open-canopy streams and that it varies following the diel pattern of gross primary production (GPP). We therefore evaluated the temporal variation in phosphate (PO43−) and ammonium (NH4+) uptake at a daily scale in a highly-productive Pampean stream that is dominated by a dense assemblage of macrophytes and filamentous algae. We conducted 6 slug additions of PO43− and NH4+ over a 24-h period and quantified reach-scale nutrient uptake concurrently with measurements of whole-stream metabolism and chemical variables during additions (including nitrates and nitrites). The study stream had extremely high uptake of PO43− and NH4+ (>90 and >75% retention of the P and N mass added, respectively). Uptake of PO43− did not vary throughout the day. Estimated PO43− uptake from GPP accounted for only a small fraction of observed PO43− uptake. Thus, another mechanism, such as heterotrophic demand by microbial assemblages or adsorption onto sediments, could also have contributed to PO43− uptake in the study stream. In contrast, NH4+ uptake clearly varied throughout the day. Up to 48% of the observed NH4+ uptake rate could be explained by NH4+ estimated from GPP, and NH4+ demand was positively associated with GPP, indicating a high dependence on photoautotrophic demand. An increase of nitrite (NO2−) concentration during additions (representing up to 70% of the added mass of NH4+) suggests that nitrification contributed to the diel pattern of NH4+ uptake. Our results indicate that nutrient uptake does not always rely on autotrophic demand in open-canopy streams and that other abiotic and dissimilatory mechanisms may explain the diel patterns of nutrient retention. In addition, our study highlights the need to measure uptake metrics throughout the day to obtain an accurate estimate of nutrient retention on a daily scale.Peer reviewedUniversity of Chicago PressConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202020202020info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/211483reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttps://doi.org/10.1086/708933Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2114832026-05-22T06:33:51Z
dc.title.none.fl_str_mv Diel variations of nutrient retention and metabolism are coupled for ammonium but not for phosphorus in a lowland stream
title Diel variations of nutrient retention and metabolism are coupled for ammonium but not for phosphorus in a lowland stream
spellingShingle Diel variations of nutrient retention and metabolism are coupled for ammonium but not for phosphorus in a lowland stream
Martí, Eugènia
Nitrification .
Pampean streams
Nutrient uptake
Nitrogen
Phosphorus
Macrophytes
Biofilms
Metabolism
title_short Diel variations of nutrient retention and metabolism are coupled for ammonium but not for phosphorus in a lowland stream
title_full Diel variations of nutrient retention and metabolism are coupled for ammonium but not for phosphorus in a lowland stream
title_fullStr Diel variations of nutrient retention and metabolism are coupled for ammonium but not for phosphorus in a lowland stream
title_full_unstemmed Diel variations of nutrient retention and metabolism are coupled for ammonium but not for phosphorus in a lowland stream
title_sort Diel variations of nutrient retention and metabolism are coupled for ammonium but not for phosphorus in a lowland stream
dc.creator.none.fl_str_mv Martí, Eugènia
Feijoó, Claudia
Vilches, Carolina
Ferreiro, Nicolás
Gantes, Patricia
Ranieri, Constanza
Torremorell, Ana
Rodríguez Castro, María Carolina
Gultemiriam, María Lourdes
Giorgi, Adonis
Sabater, Francesc
author Martí, Eugènia
author_facet Martí, Eugènia
Feijoó, Claudia
Vilches, Carolina
Ferreiro, Nicolás
Gantes, Patricia
Ranieri, Constanza
Torremorell, Ana
Rodríguez Castro, María Carolina
Gultemiriam, María Lourdes
Giorgi, Adonis
Sabater, Francesc
author_role author
author2 Feijoó, Claudia
Vilches, Carolina
Ferreiro, Nicolás
Gantes, Patricia
Ranieri, Constanza
Torremorell, Ana
Rodríguez Castro, María Carolina
Gultemiriam, María Lourdes
Giorgi, Adonis
Sabater, Francesc
author2_role author
author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Nitrification .
Pampean streams
Nutrient uptake
Nitrogen
Phosphorus
Macrophytes
Biofilms
Metabolism
topic Nitrification .
Pampean streams
Nutrient uptake
Nitrogen
Phosphorus
Macrophytes
Biofilms
Metabolism
description Este artículo contiene 13 páginas, 3 tablas, 4 figuras
publishDate 2020
dc.date.none.fl_str_mv 2020
2020
2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/211483
url http://hdl.handle.net/10261/211483
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.1086/708933
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv University of Chicago Press
publisher.none.fl_str_mv University of Chicago Press
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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