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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ftdoajarticles:oai:doaj.org/article:d4c22689e26640e682d9c124ab193035 2023-05-15T17:27:43+02:00 Grazing behavior and winter phytoplankton accumulation M. Freilich A. Mignot G. Flierl R. Ferrari 2021-10-01T00:00:00Z https://doi.org/10.5194/bg-18-5595-2021 https://doaj.org/article/d4c22689e26640e682d9c124ab193035 EN eng Copernicus Publications https://bg.copernicus.org/articles/18/5595/2021/bg-18-5595-2021.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-18-5595-2021 1726-4170 1726-4189 https://doaj.org/article/d4c22689e26640e682d9c124ab193035 Biogeosciences, Vol 18, Pp 5595-5607 (2021) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2021 ftdoajarticles https://doi.org/10.5194/bg-18-5595-2021 2022-12-31T11:49:04Z 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 Directory of Open Access Journals: DOAJ Articles Biogeosciences 18 20 5595 5607 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
spellingShingle |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 M. Freilich A. Mignot G. Flierl R. Ferrari Grazing behavior and winter phytoplankton accumulation |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
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 |
M. Freilich A. Mignot G. Flierl R. Ferrari |
author_facet |
M. Freilich A. Mignot G. Flierl R. Ferrari |
author_sort |
M. Freilich |
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://doaj.org/article/d4c22689e26640e682d9c124ab193035 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Biogeosciences, Vol 18, Pp 5595-5607 (2021) |
op_relation |
https://bg.copernicus.org/articles/18/5595/2021/bg-18-5595-2021.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-18-5595-2021 1726-4170 1726-4189 https://doaj.org/article/d4c22689e26640e682d9c124ab193035 |
op_doi |
https://doi.org/10.5194/bg-18-5595-2021 |
container_title |
Biogeosciences |
container_volume |
18 |
container_issue |
20 |
container_start_page |
5595 |
op_container_end_page |
5607 |
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1766119994571096064 |