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Constraining the response of phytoplankton to zooplankton grazing and photo-acclimation in a temperate shelf sea with a 1-D model – towards S2P3 v8.0

Constraining the response of phytoplankton to zooplankton grazing and photo-acclimation in a temperate shelf sea with a 1-D model – towards S2P3 v8.0
Constraining the response of phytoplankton to zooplankton grazing and photo-acclimation in a temperate shelf sea with a 1-D model – towards S2P3 v8.0
An established one-dimensional Shelf Sea Physics and Primary Production (S2P3) model has been developed into three different new models: S2P3-NPZ which includes a nutrient–phytoplankton–zooplankton (NPZ) framework, where the grazing rate is no longer fixed but instead varies over time depending on different functions chosen to represent the predator–prey relationship between zooplankton and phytoplankton; S2P3-Photoacclim which includes a representation of the process of photo-acclimation and flexible stoichiometry in phytoplankton; and S2P3 v8.0 which combines the NPZ framework and the variable stoichiometry of phytoplankton at the same time. These model formulations are compared to buoy and conductivity–temperature–depth (CTD) observations, as well as zooplankton biomass and in situ phytoplankton physiological parameters obtained in the central Celtic Sea (CCS). Models were calibrated by comparison to observations of the timing and magnitude of the spring phytoplankton bloom, magnitude of the spring zooplankton bloom, and phytoplankton physiological parameters obtained throughout the water column. A sensitivity study was also performed for each model to understand the effects of individual parameters on model dynamics. Results demonstrate that better agreement with biological observations can be obtained through the addition of representations of photo-acclimation, flexible stoichiometry, and grazing provided these can be adequately constrained.
1991-9603
Bahamondes Dominguez, Angela Andrea
e61c0d45-b73b-4a49-826d-7c8280613dad
Hickman, Anna
a99786c6-65e6-48c8-8b58-0d3b5608be92
Marsh, Robert
702c2e7e-ac19-4019-abd9-a8614ab27717
Moore, Christopher
7ec80b7b-bedc-4dd5-8924-0f5d01927b12
Bahamondes Dominguez, Angela Andrea
e61c0d45-b73b-4a49-826d-7c8280613dad
Hickman, Anna
a99786c6-65e6-48c8-8b58-0d3b5608be92
Marsh, Robert
702c2e7e-ac19-4019-abd9-a8614ab27717
Moore, Christopher
7ec80b7b-bedc-4dd5-8924-0f5d01927b12

Bahamondes Dominguez, Angela Andrea, Hickman, Anna, Marsh, Robert and Moore, Christopher (2020) Constraining the response of phytoplankton to zooplankton grazing and photo-acclimation in a temperate shelf sea with a 1-D model – towards S2P3 v8.0. Geoscientific Model Development, 13 (9). (doi:10.5194/gmd-13-4019-2020).

Record type: Article

Abstract

An established one-dimensional Shelf Sea Physics and Primary Production (S2P3) model has been developed into three different new models: S2P3-NPZ which includes a nutrient–phytoplankton–zooplankton (NPZ) framework, where the grazing rate is no longer fixed but instead varies over time depending on different functions chosen to represent the predator–prey relationship between zooplankton and phytoplankton; S2P3-Photoacclim which includes a representation of the process of photo-acclimation and flexible stoichiometry in phytoplankton; and S2P3 v8.0 which combines the NPZ framework and the variable stoichiometry of phytoplankton at the same time. These model formulations are compared to buoy and conductivity–temperature–depth (CTD) observations, as well as zooplankton biomass and in situ phytoplankton physiological parameters obtained in the central Celtic Sea (CCS). Models were calibrated by comparison to observations of the timing and magnitude of the spring phytoplankton bloom, magnitude of the spring zooplankton bloom, and phytoplankton physiological parameters obtained throughout the water column. A sensitivity study was also performed for each model to understand the effects of individual parameters on model dynamics. Results demonstrate that better agreement with biological observations can be obtained through the addition of representations of photo-acclimation, flexible stoichiometry, and grazing provided these can be adequately constrained.

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Accepted/In Press date: 29 June 2020
Published date: 4 September 2020

Identifiers

Local EPrints ID: 444019
URI: http://eprints.soton.ac.uk/id/eprint/444019
ISSN: 1991-9603
PURE UUID: 2bfca3f5-6d4c-4dbd-be04-7ca4402d82e1
ORCID for Anna Hickman: ORCID iD orcid.org/0000-0002-2774-3934

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Date deposited: 22 Sep 2020 16:31
Last modified: 07 Oct 2020 02:01

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