Grazing behavior and winter phytoplankton accumulation
Recent observations have shown that phytoplankton biomass increases in the North Atlantic during winter, even when the mixed layer is deepening and light is limited. Current theories suggest that this is due to a release from grazing pressure. Here we demonstrate that the often-used grazing models t...
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2021
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00058451 2024-09-15T18:21:14+00:00 Grazing behavior and winter phytoplankton accumulation Freilich, Mara Mignot, Alexandre Flierl, Glenn Ferrari, Raffaele 2021-10 electronic https://doi.org/10.5194/bg-18-5595-2021 https://noa.gwlb.de/receive/cop_mods_00058451 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00058090/bg-18-5595-2021.pdf https://bg.copernicus.org/articles/18/5595/2021/bg-18-5595-2021.pdf eng eng Copernicus Publications Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-18-5595-2021 https://noa.gwlb.de/receive/cop_mods_00058451 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00058090/bg-18-5595-2021.pdf https://bg.copernicus.org/articles/18/5595/2021/bg-18-5595-2021.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2021 ftnonlinearchiv https://doi.org/10.5194/bg-18-5595-2021 2024-06-26T04:36:34Z Recent observations have shown that phytoplankton biomass increases in the North Atlantic during winter, even when the mixed layer is deepening and light is limited. Current theories suggest that this is due to a release from grazing pressure. Here we demonstrate that the often-used grazing models that are linear at low phytoplankton concentration do not allow for a wintertime increase in phytoplankton biomass. However, mathematical formulations of grazing as a function of phytoplankton concentration that are quadratic at low concentrations (or more generally decrease faster than linearly as phytoplankton concentration decreases) can reproduce the fall to spring transition in phytoplankton, including wintertime biomass accumulation. We illustrate this point with a minimal model for the annual cycle of North Atlantic phytoplankton designed to simulate phytoplankton concentration as observed by BioGeoChemical-Argo (BGC-Argo) floats in the North Atlantic. This analysis provides a mathematical framework for assessing hypotheses of phytoplankton bloom formation. Article in Journal/Newspaper North Atlantic Niedersächsisches Online-Archiv NOA Biogeosciences 18 20 5595 5607 |
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English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Freilich, Mara Mignot, Alexandre Flierl, Glenn Ferrari, Raffaele Grazing behavior and winter phytoplankton accumulation |
topic_facet |
article Verlagsveröffentlichung |
description |
Recent observations have shown that phytoplankton biomass increases in the North Atlantic during winter, even when the mixed layer is deepening and light is limited. Current theories suggest that this is due to a release from grazing pressure. Here we demonstrate that the often-used grazing models that are linear at low phytoplankton concentration do not allow for a wintertime increase in phytoplankton biomass. However, mathematical formulations of grazing as a function of phytoplankton concentration that are quadratic at low concentrations (or more generally decrease faster than linearly as phytoplankton concentration decreases) can reproduce the fall to spring transition in phytoplankton, including wintertime biomass accumulation. We illustrate this point with a minimal model for the annual cycle of North Atlantic phytoplankton designed to simulate phytoplankton concentration as observed by BioGeoChemical-Argo (BGC-Argo) floats in the North Atlantic. This analysis provides a mathematical framework for assessing hypotheses of phytoplankton bloom formation. |
format |
Article in Journal/Newspaper |
author |
Freilich, Mara Mignot, Alexandre Flierl, Glenn Ferrari, Raffaele |
author_facet |
Freilich, Mara Mignot, Alexandre Flierl, Glenn Ferrari, Raffaele |
author_sort |
Freilich, Mara |
title |
Grazing behavior and winter phytoplankton accumulation |
title_short |
Grazing behavior and winter phytoplankton accumulation |
title_full |
Grazing behavior and winter phytoplankton accumulation |
title_fullStr |
Grazing behavior and winter phytoplankton accumulation |
title_full_unstemmed |
Grazing behavior and winter phytoplankton accumulation |
title_sort |
grazing behavior and winter phytoplankton accumulation |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/bg-18-5595-2021 https://noa.gwlb.de/receive/cop_mods_00058451 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00058090/bg-18-5595-2021.pdf https://bg.copernicus.org/articles/18/5595/2021/bg-18-5595-2021.pdf |
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North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-18-5595-2021 https://noa.gwlb.de/receive/cop_mods_00058451 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00058090/bg-18-5595-2021.pdf https://bg.copernicus.org/articles/18/5595/2021/bg-18-5595-2021.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-18-5595-2021 |
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Biogeosciences |
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18 |
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20 |
container_start_page |
5595 |
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5607 |
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1810459704154914816 |