Ecosystem dynamics at six contrasting sites: a generic modelling study

Blackford, Jerry; Allen, J. Icarus; Gilbert, F.

doi:10.1016/j.jmarsys.2004.02.004

Cited by 253 publications

(254 citation statements)

References 37 publications

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“…We have chosen to use European Regional Sea Ecosystem Model (ERSEM [36,37]) for this study as it presents a relatively complex representation of the planktonic community structure which we consider to be crucial for a realistic assessment of the ecosystem production/respiration budget, hence CO 2 dynamics. Indeed, ERSEM has been used substantially to address a range of questions in marine carbon cycle and biogeochemical research in a range of regions, such as the NW European Shelf, the Arabian Sea and the Sargasso Sea of the subtropical North Atlantic gyre, e.g.…”

Section: Choice Of Ecosystem Modelmentioning

confidence: 99%

“…Functional types belonging to the same group share common process descriptions but different parametrizations. General parametrizations used in ERSEM are listed in [37] with the bacterial submodel described in [48].…”

Section: Biogeochemical Model Descriptionmentioning

confidence: 99%

“…For this study, we used the previously published ERSEM-GOTM system [37,39,44]. The General Ocean Turbulence Model (GOTM [52]) is a one-dimensional water column model which dynamically simulates the evolution of temperature, density and vertical mixing.…”

Section: Model Set-upmentioning

confidence: 99%

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Impacts of light shading and nutrient enrichment geo-engineering approaches on the productivity of a stratified, oligotrophic ocean ecosystem

Hardman-Mountford

Polimene

Hirata

et al. 2013

J. R. Soc. Interface.

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Geo-engineering proposals to mitigate global warming have focused either on methods of carbon dioxide removal, particularly nutrient fertilization of plant growth, or on cooling the Earth's surface by reducing incoming solar radiation (shading). Marine phytoplankton contribute half the Earth's biological carbon fixation and carbon export in the ocean is modulated by the actions of microbes and grazing communities in recycling nutrients. Both nutrients and light are essential for photosynthesis, so understanding the relative influence of both these geo-engineering approaches on ocean ecosystem production and processes is critical to the evaluation of their effectiveness. In this paper, we investigate the relationship between light and nutrient availability on productivity in a stratified, oligotrophic subtropical ocean ecosystem using a one-dimensional water column model coupled to a multi-plankton ecosystem model, with the goal of elucidating potential impacts of these geo-engineering approaches on ecosystem production. We find that solar shading approaches can redistribute productivity in the water column but do not change total production. Macronutrient enrichment is able to enhance the export of carbon, although heterotrophic recycling reduces the efficiency of carbon export substantially over time. Our results highlight the requirement for a fuller consideration of marine ecosystem interactions and feedbacks, beyond simply the stimulation of surface blooms, in the evaluation of putative geo-engineering approaches.

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Section: Choice Of Ecosystem Modelmentioning

confidence: 99%

Section: Biogeochemical Model Descriptionmentioning

confidence: 99%

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Impacts of light shading and nutrient enrichment geo-engineering approaches on the productivity of a stratified, oligotrophic ocean ecosystem

Hardman-Mountford

Polimene

Hirata

et al. 2013

J. R. Soc. Interface.

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“…The former process is taken into account by Geider's parameterization, while the latter is generally parameterized with different formulations,for instance by assuming a dependence on gross carbon uptake (Geider et al, 1997;Blackford et al, 2004) and/or on nitrogen assimilation (Geider et al, 1998;Flynn et al, 2001). To integrate these processes into the ERSEM formulation, it is assumed that nutrient-stressed cells that release substantial amount of DOC tend to regulate their internal chl:C ratio as well, therefore we write net synthesis as a direct function of net carbon assimilation:…”

Section: Chlorophyll Dynamicsmentioning

confidence: 99%

“…A direct descendant of ERSEM, the Biogeochemical Flux Model (BFM), is now being developed in the framework of the EU project MFSTEP (Mediterranean Forecasting System Toward Environmental Predictions, http://www.bo.ingv.it/mfstep) and applied to the whole Mediterranean basin and subregional seas. Finally, a recent publication (Blackford et al, 2004) has shown that the ERSEM approach to pelagic biogeochemistry was able to adapt to contrasting sites in the world ocean making it appealing for applications in the global ocean.…”

Section: Introductionmentioning

confidence: 99%

A generalized model of pelagic biogeochemistry for the global ocean ecosystem. Part I: Theory

Vichi

Pinardi

Masina

2007

Journal of Marine Systems

205

204

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A multicomponent model of phytoplankton size structure

et al. 2014

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Size-fractionated filtration (SFF) is a direct method for estimating pigment concentration in various size classes. It is also common practice to infer the size structure of phytoplankton communities from diagnostic pigments estimated by high-performance liquid chromatography (HPLC). In this paper, the three-component model of Brewin et al. (2010) was fitted to coincident data from HPLC and from SFF collected along Atlantic Meridional Transect cruises. The model accounted for the variability in each data set, but the fitted model parameters differed for the two data sets. Both HPLC and SFF data supported the conceptual framework of the three-component model, which assumes that the chlorophyll concentration in small cells increases to an asymptotic maximum, beyond which further increase in chlorophyll is achieved by the addition of larger celled phytoplankton. The three-component model was extended to a multicomponent model of size structure using observed relationships between model parameters and assuming that the asymptotic concentration that can be reached by cells increased linearly with increase in the upper bound on the cell size. The multicomponent model was verified using independent SFF data for a variety of size fractions and found to perform well (0.628 r 0.989) lending support for the underlying assumptions. An advantage of the multicomponent model over the three-component model is that, for the same number of parameters, it can be applied to any size range in a continuous fashion. The multicomponent model provides a useful tool for studying the distribution of phytoplankton size structure at large scales.

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Ecosystem dynamics at six contrasting sites: a generic modelling study

Cited by 253 publications

References 37 publications

Impacts of light shading and nutrient enrichment geo-engineering approaches on the productivity of a stratified, oligotrophic ocean ecosystem

Impacts of light shading and nutrient enrichment geo-engineering approaches on the productivity of a stratified, oligotrophic ocean ecosystem

A generalized model of pelagic biogeochemistry for the global ocean ecosystem. Part I: Theory

A multicomponent model of phytoplankton size structure

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