Hydraulic and biological controls of biofilm nitrogen uptake in gravel-bed streams

Epibenthic biofilms are important in regulating nitrogen (N) fluxes in stream ecosystems. The efficiency of the regulation is controlled by hydraulic and biological processes and their interactions. However, knowledge on the underlying physical and biological processes, their controlling parameters,...

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Autores: Anlanger, Christine, Risse-Buhl, Ute, Schiller Calle, Daniel von, Noss, Christian, Weitere, Markus, Lorke, Andreas
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2021
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/183671
Acceso en línea:https://hdl.handle.net/2445/183671
Access Level:acceso abierto
Palabra clave:Biofilms
Nitrogen
Ecologia fluvial
Stream ecology
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spelling Hydraulic and biological controls of biofilm nitrogen uptake in gravel-bed streamsAnlanger, ChristineRisse-Buhl, UteSchiller Calle, Daniel vonNoss, ChristianWeitere, MarkusLorke, AndreasBiofilmsNitrogenEcologia fluvialBiofilmsNitrogenStream ecologyEpibenthic biofilms are important in regulating nitrogen (N) fluxes in stream ecosystems. The efficiency of the regulation is controlled by hydraulic and biological processes and their interactions. However, knowledge on the underlying physical and biological processes, their controlling parameters, and interactions in stream ecosystems is still limited. To analyze the relative importance of hydraulic and biological controls on biofilm N uptake, we measured turbulence, biofilm N uptake using a stable isotope tracer, and biofilm biomass in two gravel-bed streams with contrasting nutrient concentrations for two seasons. We found high within-stream vari ability in biofilm areal N uptake and uptake velocity, which exceeded variability between streams and seasons by 60% and 30%, respectively. Sixty-four percent of the within-stream variability in uptake velocity was explained by hydraulic mass transfer and biofilm characteristics, which were described in terms of the turbulent dissipation rate and the biofilm biomass, respectively. We show that surface renewal theory based on scales of the smallest turbulent eddies can be used to estimate transfer velocities at the sediment-water interface and can be extrapolated to larger scales by spatial averaging. Our results improved the mechanistic understanding of the processes regulating biofilm N uptake at small scale which contributes to the understanding of ecosystem func tioning in low-order streams and supports upscaling to larger spatiotemporal scales along stream networks.American Society of Limnology and Oceanography.2022202220212022info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion14 p.application/pdfapplication/pdfhttps://hdl.handle.net/2445/183671Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: https://doi.org/10.1002/lno.11927Limnology and Oceanography, 2021, vol. 66, num. 11, p. 3887-3900https://doi.org/10.1002/lno.11927cc by-nc-nd (c) Anlanger, Christine et al., 2021http://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1836712026-05-29T05:05:01Z
dc.title.none.fl_str_mv Hydraulic and biological controls of biofilm nitrogen uptake in gravel-bed streams
title Hydraulic and biological controls of biofilm nitrogen uptake in gravel-bed streams
spellingShingle Hydraulic and biological controls of biofilm nitrogen uptake in gravel-bed streams
Anlanger, Christine
Biofilms
Nitrogen
Ecologia fluvial
Biofilms
Nitrogen
Stream ecology
title_short Hydraulic and biological controls of biofilm nitrogen uptake in gravel-bed streams
title_full Hydraulic and biological controls of biofilm nitrogen uptake in gravel-bed streams
title_fullStr Hydraulic and biological controls of biofilm nitrogen uptake in gravel-bed streams
title_full_unstemmed Hydraulic and biological controls of biofilm nitrogen uptake in gravel-bed streams
title_sort Hydraulic and biological controls of biofilm nitrogen uptake in gravel-bed streams
dc.creator.none.fl_str_mv Anlanger, Christine
Risse-Buhl, Ute
Schiller Calle, Daniel von
Noss, Christian
Weitere, Markus
Lorke, Andreas
author Anlanger, Christine
author_facet Anlanger, Christine
Risse-Buhl, Ute
Schiller Calle, Daniel von
Noss, Christian
Weitere, Markus
Lorke, Andreas
author_role author
author2 Risse-Buhl, Ute
Schiller Calle, Daniel von
Noss, Christian
Weitere, Markus
Lorke, Andreas
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Biofilms
Nitrogen
Ecologia fluvial
Biofilms
Nitrogen
Stream ecology
topic Biofilms
Nitrogen
Ecologia fluvial
Biofilms
Nitrogen
Stream ecology
description Epibenthic biofilms are important in regulating nitrogen (N) fluxes in stream ecosystems. The efficiency of the regulation is controlled by hydraulic and biological processes and their interactions. However, knowledge on the underlying physical and biological processes, their controlling parameters, and interactions in stream ecosystems is still limited. To analyze the relative importance of hydraulic and biological controls on biofilm N uptake, we measured turbulence, biofilm N uptake using a stable isotope tracer, and biofilm biomass in two gravel-bed streams with contrasting nutrient concentrations for two seasons. We found high within-stream vari ability in biofilm areal N uptake and uptake velocity, which exceeded variability between streams and seasons by 60% and 30%, respectively. Sixty-four percent of the within-stream variability in uptake velocity was explained by hydraulic mass transfer and biofilm characteristics, which were described in terms of the turbulent dissipation rate and the biofilm biomass, respectively. We show that surface renewal theory based on scales of the smallest turbulent eddies can be used to estimate transfer velocities at the sediment-water interface and can be extrapolated to larger scales by spatial averaging. Our results improved the mechanistic understanding of the processes regulating biofilm N uptake at small scale which contributes to the understanding of ecosystem func tioning in low-order streams and supports upscaling to larger spatiotemporal scales along stream networks.
publishDate 2021
dc.date.none.fl_str_mv 2021
2022
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/183671
url https://hdl.handle.net/2445/183671
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1002/lno.11927
Limnology and Oceanography, 2021, vol. 66, num. 11, p. 3887-3900
https://doi.org/10.1002/lno.11927
dc.rights.none.fl_str_mv cc by-nc-nd (c) Anlanger, Christine et al., 2021
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc by-nc-nd (c) Anlanger, Christine et al., 2021
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 14 p.
application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Society of Limnology and Oceanography.
publisher.none.fl_str_mv American Society of Limnology and Oceanography.
dc.source.none.fl_str_mv Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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