Phytoplankton acclimation to changing light intensity in a turbulent mixed layer: A Lagrangian modelling study
A new individual-based plankton model is used to test the hypothesis that the timescale of photoacclimation of phytoplankton within the surface mixing layer of the ocean is slow relative to mixing, in which case the chlorophyll to carbon (Chl:C) ratio of individual cells shows little adjustment in r...
Published in: | Ecological Modelling |
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2020
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ftnerc:oai:nora.nerc.ac.uk:526772 2023-05-15T17:34:04+02:00 Phytoplankton acclimation to changing light intensity in a turbulent mixed layer: A Lagrangian modelling study Tomkins, Melissa Martin, Adrian P. Nurser, A.J. George Anderson, Thomas R. 2020-01-07 text http://nora.nerc.ac.uk/id/eprint/526772/ https://nora.nerc.ac.uk/id/eprint/526772/1/__filestore.soton.ac.uk_users_elc1_mydesktop_OA_Downloads_Tomkkins.pdf https://doi.org/10.1016/j.ecolmodel.2019.108917 en eng https://nora.nerc.ac.uk/id/eprint/526772/1/__filestore.soton.ac.uk_users_elc1_mydesktop_OA_Downloads_Tomkkins.pdf Tomkins, Melissa; Martin, Adrian P. orcid:0000-0002-1202-8612 Nurser, A.J. George; Anderson, Thomas R. orcid:0000-0002-7408-1566 . 2020 Phytoplankton acclimation to changing light intensity in a turbulent mixed layer: A Lagrangian modelling study. Ecological Modelling, 417. 108917. https://doi.org/10.1016/j.ecolmodel.2019.108917 <https://doi.org/10.1016/j.ecolmodel.2019.108917> cc_by_4 CC-BY Publication - Article PeerReviewed 2020 ftnerc https://doi.org/10.1016/j.ecolmodel.2019.108917 2023-02-04T19:50:09Z A new individual-based plankton model is used to test the hypothesis that the timescale of photoacclimation of phytoplankton within the surface mixing layer of the ocean is slow relative to mixing, in which case the chlorophyll to carbon (Chl:C) ratio of individual cells shows little adjustment in response to changes in light environment driven by vertical displacement. Rates of photoacclimation are shown to be a strongly non-linear function of light intensity that depends on the balance of intrinsic chlorophyll synthesis at low irradiance versus increasing growth rate at high irradiance. Predicted photoacclimation was negligible for cells experiencing rates of turbulent mixing typical of the open ocean surface boundary layer (10−3 to 10-1 m2 s-1), in which case Chl:C is set by mean light intensity. The model was extended to incorporate a simple ecosystem of nutrient, phytoplankton, zooplankton and detritus and, using two-layer slab physics, used to study photoacclimation in a more realistic setting, the seasonal cycle of plankton dynamics at Ocean Weather Station India in the North Atlantic (59 °N, 20 °W). Results were remarkably similar when compared with an equivalent ecosystem model that used an Eulerian representation of phytoplankton, reinforcing our conclusion that mixing rates within the surface mixed layer of the ocean are typically too fast to permit photoacclimation by phytoplankton to ambient light. Article in Journal/Newspaper North Atlantic Natural Environment Research Council: NERC Open Research Archive Ecological Modelling 417 108917 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
language |
English |
description |
A new individual-based plankton model is used to test the hypothesis that the timescale of photoacclimation of phytoplankton within the surface mixing layer of the ocean is slow relative to mixing, in which case the chlorophyll to carbon (Chl:C) ratio of individual cells shows little adjustment in response to changes in light environment driven by vertical displacement. Rates of photoacclimation are shown to be a strongly non-linear function of light intensity that depends on the balance of intrinsic chlorophyll synthesis at low irradiance versus increasing growth rate at high irradiance. Predicted photoacclimation was negligible for cells experiencing rates of turbulent mixing typical of the open ocean surface boundary layer (10−3 to 10-1 m2 s-1), in which case Chl:C is set by mean light intensity. The model was extended to incorporate a simple ecosystem of nutrient, phytoplankton, zooplankton and detritus and, using two-layer slab physics, used to study photoacclimation in a more realistic setting, the seasonal cycle of plankton dynamics at Ocean Weather Station India in the North Atlantic (59 °N, 20 °W). Results were remarkably similar when compared with an equivalent ecosystem model that used an Eulerian representation of phytoplankton, reinforcing our conclusion that mixing rates within the surface mixed layer of the ocean are typically too fast to permit photoacclimation by phytoplankton to ambient light. |
format |
Article in Journal/Newspaper |
author |
Tomkins, Melissa Martin, Adrian P. Nurser, A.J. George Anderson, Thomas R. |
spellingShingle |
Tomkins, Melissa Martin, Adrian P. Nurser, A.J. George Anderson, Thomas R. Phytoplankton acclimation to changing light intensity in a turbulent mixed layer: A Lagrangian modelling study |
author_facet |
Tomkins, Melissa Martin, Adrian P. Nurser, A.J. George Anderson, Thomas R. |
author_sort |
Tomkins, Melissa |
title |
Phytoplankton acclimation to changing light intensity in a turbulent mixed layer: A Lagrangian modelling study |
title_short |
Phytoplankton acclimation to changing light intensity in a turbulent mixed layer: A Lagrangian modelling study |
title_full |
Phytoplankton acclimation to changing light intensity in a turbulent mixed layer: A Lagrangian modelling study |
title_fullStr |
Phytoplankton acclimation to changing light intensity in a turbulent mixed layer: A Lagrangian modelling study |
title_full_unstemmed |
Phytoplankton acclimation to changing light intensity in a turbulent mixed layer: A Lagrangian modelling study |
title_sort |
phytoplankton acclimation to changing light intensity in a turbulent mixed layer: a lagrangian modelling study |
publishDate |
2020 |
url |
http://nora.nerc.ac.uk/id/eprint/526772/ https://nora.nerc.ac.uk/id/eprint/526772/1/__filestore.soton.ac.uk_users_elc1_mydesktop_OA_Downloads_Tomkkins.pdf https://doi.org/10.1016/j.ecolmodel.2019.108917 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://nora.nerc.ac.uk/id/eprint/526772/1/__filestore.soton.ac.uk_users_elc1_mydesktop_OA_Downloads_Tomkkins.pdf Tomkins, Melissa; Martin, Adrian P. orcid:0000-0002-1202-8612 Nurser, A.J. George; Anderson, Thomas R. orcid:0000-0002-7408-1566 . 2020 Phytoplankton acclimation to changing light intensity in a turbulent mixed layer: A Lagrangian modelling study. Ecological Modelling, 417. 108917. https://doi.org/10.1016/j.ecolmodel.2019.108917 <https://doi.org/10.1016/j.ecolmodel.2019.108917> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1016/j.ecolmodel.2019.108917 |
container_title |
Ecological Modelling |
container_volume |
417 |
container_start_page |
108917 |
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1766132767237603328 |