Homeostasis and non-linear shift in the stoichiometry of P-limited planktonic communities

Planktonic communities are naturally subjected to episodic nutrient enrichments that may stress or redress the imbalances in limiting nutrients. Human‐enhanced atmospheric nitrogen deposition has caused profound N:P imbalance in many remote oligotrophic lakes in which phosphorus has largely become l...

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Authors: Giménez-Grau, Pau, Felip i Benach, Marisol, Zufiaurre, Aitziber, Pla-Rabès, Sergi, Camarero, Lluís, Catalan i Aguilà, Jordi
Format: article
Status:Published version
Publication Date:2020
Country:España
Institution:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repository:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/171053
Online Access:https://hdl.handle.net/2445/171053
Access Level:Open access
Keyword:Ecologia dels llacs
Lake ecology
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spelling Homeostasis and non-linear shift in the stoichiometry of P-limited planktonic communitiesGiménez-Grau, PauFelip i Benach, MarisolZufiaurre, AitziberPla-Rabès, SergiCamarero, LluísCatalan i Aguilà, JordiEcologia dels llacsLake ecologyPlanktonic communities are naturally subjected to episodic nutrient enrichments that may stress or redress the imbalances in limiting nutrients. Human‐enhanced atmospheric nitrogen deposition has caused profound N:P imbalance in many remote oligotrophic lakes in which phosphorus has largely become limiting. These lakes offer an opportunity to investigate the relationship between the changes in plankton stoichiometry, productivity, and community structure occurring during nutrient fluctuations in P‐limited conditions. We performed P ( PO3‐4) and N ( NH+4 or NO‐3) pulse additions to the summer epilimnetic community of an ultraoligotrophic lake using self‐filling ~100‐L enclosures and analyzed the response to varying P availability, N:P imbalance, and N source. Seston C:N:P proportions remained fairly unchanged to P additions that were within the range of values seasonally found in the lake. However, the seston N:P ratio abruptly shifted and approached Redfield's proportions at P additions typical of mesotrophic conditions that provided non‐limiting conditions. N surplus did not affect seston C:N:P proportions. The patterns of seston N:P stability and shift were similar for both N sources. In contrast, productivity was highly sensitive to low and medium P additions and decelerated at high P additions. Phytoplankton biomass dominated particulate organic matter. The autotrophic community differentiated almost linearly across the P gradient. Chrysophytes' dominance decreased, and diatoms and cryptophytes relative abundance increased. Nonetheless, the stoichiometry stability and non‐linear shift involved large biomass proportions of the same species, which indicates that the bulk stoichiometry was related to similar physiological behavior of phylogenetically diverse organisms according to the biogeochemical context. The C:N:P seston stability in P‐limited conditions with loose coupling with productivity, nutrient supply ratios, and species dominance and the sudden shift to Redfield proportions in P‐repleted conditions suggest a complex regulation of P scarcity in planktonic communities that goes beyond immediate acclimation growth responses and might include alternative physiological and biogeochemical states.The Ecological Society of America2020202020202020info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion18 p.application/pdfhttps://hdl.handle.net/2445/171053Articles 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/ecs2.3249Ecosphere, 2020, vol. 11, p. e03249https://doi.org/10.1002/ecs2.3249cc-by (c) Giménez-Grau, Pau et al., 2020http://creativecommons.org/licenses/by/3.0/esinfo:eu-repo/semantics/openAccessoai:recercat.cat:2445/1710532026-05-29T05:05:01Z
dc.title.none.fl_str_mv Homeostasis and non-linear shift in the stoichiometry of P-limited planktonic communities
title Homeostasis and non-linear shift in the stoichiometry of P-limited planktonic communities
spellingShingle Homeostasis and non-linear shift in the stoichiometry of P-limited planktonic communities
Giménez-Grau, Pau
Ecologia dels llacs
Lake ecology
title_short Homeostasis and non-linear shift in the stoichiometry of P-limited planktonic communities
title_full Homeostasis and non-linear shift in the stoichiometry of P-limited planktonic communities
title_fullStr Homeostasis and non-linear shift in the stoichiometry of P-limited planktonic communities
title_full_unstemmed Homeostasis and non-linear shift in the stoichiometry of P-limited planktonic communities
title_sort Homeostasis and non-linear shift in the stoichiometry of P-limited planktonic communities
dc.creator.none.fl_str_mv Giménez-Grau, Pau
Felip i Benach, Marisol
Zufiaurre, Aitziber
Pla-Rabès, Sergi
Camarero, Lluís
Catalan i Aguilà, Jordi
author Giménez-Grau, Pau
author_facet Giménez-Grau, Pau
Felip i Benach, Marisol
Zufiaurre, Aitziber
Pla-Rabès, Sergi
Camarero, Lluís
Catalan i Aguilà, Jordi
author_role author
author2 Felip i Benach, Marisol
Zufiaurre, Aitziber
Pla-Rabès, Sergi
Camarero, Lluís
Catalan i Aguilà, Jordi
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Ecologia dels llacs
Lake ecology
topic Ecologia dels llacs
Lake ecology
description Planktonic communities are naturally subjected to episodic nutrient enrichments that may stress or redress the imbalances in limiting nutrients. Human‐enhanced atmospheric nitrogen deposition has caused profound N:P imbalance in many remote oligotrophic lakes in which phosphorus has largely become limiting. These lakes offer an opportunity to investigate the relationship between the changes in plankton stoichiometry, productivity, and community structure occurring during nutrient fluctuations in P‐limited conditions. We performed P ( PO3‐4) and N ( NH+4 or NO‐3) pulse additions to the summer epilimnetic community of an ultraoligotrophic lake using self‐filling ~100‐L enclosures and analyzed the response to varying P availability, N:P imbalance, and N source. Seston C:N:P proportions remained fairly unchanged to P additions that were within the range of values seasonally found in the lake. However, the seston N:P ratio abruptly shifted and approached Redfield's proportions at P additions typical of mesotrophic conditions that provided non‐limiting conditions. N surplus did not affect seston C:N:P proportions. The patterns of seston N:P stability and shift were similar for both N sources. In contrast, productivity was highly sensitive to low and medium P additions and decelerated at high P additions. Phytoplankton biomass dominated particulate organic matter. The autotrophic community differentiated almost linearly across the P gradient. Chrysophytes' dominance decreased, and diatoms and cryptophytes relative abundance increased. Nonetheless, the stoichiometry stability and non‐linear shift involved large biomass proportions of the same species, which indicates that the bulk stoichiometry was related to similar physiological behavior of phylogenetically diverse organisms according to the biogeochemical context. The C:N:P seston stability in P‐limited conditions with loose coupling with productivity, nutrient supply ratios, and species dominance and the sudden shift to Redfield proportions in P‐repleted conditions suggest a complex regulation of P scarcity in planktonic communities that goes beyond immediate acclimation growth responses and might include alternative physiological and biogeochemical states.
publishDate 2020
dc.date.none.fl_str_mv 2020
2020
2020
2020
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/2445/171053
url https://hdl.handle.net/2445/171053
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/ecs2.3249
Ecosphere, 2020, vol. 11, p. e03249
https://doi.org/10.1002/ecs2.3249
dc.rights.none.fl_str_mv cc-by (c) Giménez-Grau, Pau et al., 2020
http://creativecommons.org/licenses/by/3.0/es
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Giménez-Grau, Pau et al., 2020
http://creativecommons.org/licenses/by/3.0/es
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 18 p.
application/pdf
dc.publisher.none.fl_str_mv The Ecological Society of America
publisher.none.fl_str_mv The Ecological Society of America
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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score 15.812429

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