Journal cover Journal topic
Biogeosciences An interactive open-access journal of the European Geosciences Union
Journal topic
Discussion papers
https://doi.org/10.5194/bg-2018-483
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-2018-483
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 22 Nov 2018

Research article | 22 Nov 2018

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Biogeosciences (BG).

A trait-based modelling approach to planktonic foraminifera ecology

Maria Grigoratou1, Fanny M. Monteiro1, Daniela N. Schmidt2, Jamie D. Wilson1, Ben A. Ward1,3, and Andy Ridgwell1,4 Maria Grigoratou et al.
  • 1School of Geographical Sciences, University of Bristol, Bristol BS8 1SS, UK
  • 2School of Earth Sciences, University of Bristol, Bristol BS8 1RL, UK
  • 3Ocean and Earth Science, University of Southampton, National Oceanography Centre, Southampton, European Way, Southampton SO14 3ZH, UK
  • 4Department of Earth Sciences, University of California, Riverside CA, Geology Building, 900 University Ave, Riverside, CA 92521, USA

Abstract. Despite the important role of planktonic foraminifera in regulating the ocean carbonate production and their unrivalled value in reconstructing paleoenvironments, our knowledge on their ecology is limited. A variety of observational techniques such as plankton tows, sediment traps and experiments, have contributed to our understanding of foraminifera ecology. But, fundamental questions around costs and benefits of calcification, and the effect of nutrients, temperature and ecosystem structure on these organisms remain unanswered. To tackle these questions, we take a novel mechanistic approach to study planktonic foraminifera ecology based on trait theory. We develop a 0-D trait-based model to account for the biomass of prolocular (20μm) and adult (160μm) stages of non-spinose foraminifera species and investigate their potential interactions with phytoplankton and other zooplankton under different temperature and nutrient regimes. Building on the costs and benefits of calcification, we model two ecosystem structures to explore the effect of resource competition and temperature on planktonic foraminifera biomass. By constraining the model results with ocean biomass estimations of planktonic foraminifera, we estimate that the energetic cost of calcification could be about 25–50% and 20–35% for prolocular and adult stages respectively. Our result suggest that the shell provides protection among predation (e.g. pathogens protection) and that the invariably low standing biomass of planktonic foraminifera plays a key role in their survival from predation, along with their shell protection. Temperature appears to be an important factor in regulating foraminifera biomass in the early developmental stage, whereas resource competition is a key in controlling adults' biomass and feeding strategy.

Maria Grigoratou et al.
Interactive discussion
Status: open (until 14 Jan 2019)
Status: open (until 14 Jan 2019)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement
Maria Grigoratou et al.
Data sets

SM-GRIGORATOU_ET_AL_2018.xls M. Grigoratou, F. M. Monteiro, D. N. Schmidt, J. D. Wilson, B. A. Ward, and A. Ridgwell https://doi.org/10.5281/zenodo.1487877

Model code and software

Plankton_Size_Chemostat_Grigoratou2018.py M. Grigoratou, F. M. Monteiro, D. N. Schmidt, J. D. Wilson, B. A. Ward, and A. Ridgwell https://doi.org/10.5281/zenodo.1487877

Grigoratou2018_Experiments.py M. Grigoratou, F. M. Monteiro, D. N. Schmidt, J. D. Wilson, B. A. Ward, and A. Ridgwell https://doi.org/10.5281/zenodo.1487877

Maria Grigoratou et al.
Viewed  
Total article views: 345 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
289 55 1 345 1 1
  • HTML: 289
  • PDF: 55
  • XML: 1
  • Total: 345
  • BibTeX: 1
  • EndNote: 1
Views and downloads (calculated since 22 Nov 2018)
Cumulative views and downloads (calculated since 22 Nov 2018)
Viewed (geographical distribution)  
Total article views: 345 (including HTML, PDF, and XML) Thereof 339 with geography defined and 6 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Cited  
Saved  
No saved metrics found.
Discussed  
No discussed metrics found.
Latest update: 18 Dec 2018
Publications Copernicus
Download
Short summary
The manuscript presents a novel study based on the traits of shell size, calcification and feeding behaviour of two planktonic foraminifera life stages using modelling simulations. With the model, we tested the cost and benefit of calcification and explored how the interactions of planktonic foraminifera among other plankton groups influence their biomass under different environmental conditions. Our results provide new insights into environmental controls in planktonic foraminifera ecology.
The manuscript presents a novel study based on the traits of shell size, calcification and...
Citation
Share