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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Language: | English |
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2020
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Online Access: | https://eprints.soton.ac.uk/437826/ https://eprints.soton.ac.uk/437826/1/1_s2.0_S0304380019304259_main.pdf |
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ftsouthampton:oai:eprints.soton.ac.uk:437826 2023-07-30T04:05:29+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. 2020-02-01 text https://eprints.soton.ac.uk/437826/ https://eprints.soton.ac.uk/437826/1/1_s2.0_S0304380019304259_main.pdf en English eng https://eprints.soton.ac.uk/437826/1/1_s2.0_S0304380019304259_main.pdf Tomkins, Melissa, Martin, Adrian P., Nurser, A.j. George and Anderson, Thomas R. (2020) Phytoplankton acclimation to changing light intensity in a turbulent mixed layer: A Lagrangian modelling study. Ecological Modelling, 417, [108917]. (doi:10.1016/j.ecolmodel.2019.108917 <http://dx.doi.org/10.1016/j.ecolmodel.2019.108917>). cc_by_4 Article PeerReviewed 2020 ftsouthampton https://doi.org/10.1016/j.ecolmodel.2019.108917 2023-07-09T22:34:29Z 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 University of Southampton: e-Prints Soton Ecological Modelling 417 108917 |
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Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
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 |
https://eprints.soton.ac.uk/437826/ https://eprints.soton.ac.uk/437826/1/1_s2.0_S0304380019304259_main.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://eprints.soton.ac.uk/437826/1/1_s2.0_S0304380019304259_main.pdf Tomkins, Melissa, Martin, Adrian P., Nurser, A.j. George and Anderson, Thomas R. (2020) Phytoplankton acclimation to changing light intensity in a turbulent mixed layer: A Lagrangian modelling study. Ecological Modelling, 417, [108917]. (doi:10.1016/j.ecolmodel.2019.108917 <http://dx.doi.org/10.1016/j.ecolmodel.2019.108917>). |
op_rights |
cc_by_4 |
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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1772817417619111936 |