Preprints
https://doi.org/10.5194/bg-2022-249
https://doi.org/10.5194/bg-2022-249
 
03 Jan 2023
03 Jan 2023
Status: this preprint is currently under review for the journal BG.

Modelling the interactive effects of viral presence and global warming on Baltic Sea ecosystem dynamics

Shubham Krishna1,, Victoria Peterson1,, Luisa Listmann2, and Jana Hinners1 Shubham Krishna et al.
  • 1Helmholtz-Zentrum Hereon, Max-Planck-Straße 1, 21502 Geesthacht, Germany
  • 2Institut of Marine Ecosystem and Fisheries Science, Universität Hamburg, Olbersweg 24, 22767 Hamburg
  • These authors contributed equally to this work.

Abstract. Marine viruses have been identified as key players in biogeochemical cycles and in the termination of phytoplankton blooms; however, most models of biogeochemical processes have yet to resolve viral dynamics. Here, we incorporate a viral component into a 1D ecosystem model for the Baltic Sea to explore the influence of viruses on ecosystem dynamics under current and future climatic conditions. Virus host interactions and zooplankton grazing were mechanistically described through size-based contact rates. The model demonstrated that the presence of viruses increased nutrient retention in the upper water column. This corresponded to a reduction in phytoplankton biomass, production of dead organic matter and transfer of biomass to higher trophic levels. Viral presence played a key role in deeper water layers, near the thermocline. While warming alone reversed these trends, the combination of warming and viral presence enhanced the effect of viruses. Our results illustrate that marine ecosystem models need to incorporate viral dynamics to better predict system responses to climate change.

Shubham Krishna et al.

Status: open (until 14 Feb 2023)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on bg-2022-249', Anonymous Referee #1, 16 Jan 2023 reply
  • RC2: 'Comment on bg-2022-249', Anonymous Referee #2, 23 Jan 2023 reply

Shubham Krishna et al.

Shubham Krishna et al.

Viewed

Total article views: 259 (including HTML, PDF, and XML)
HTML PDF XML Total Supplement BibTeX EndNote
197 51 11 259 27 2 2
  • HTML: 197
  • PDF: 51
  • XML: 11
  • Total: 259
  • Supplement: 27
  • BibTeX: 2
  • EndNote: 2
Views and downloads (calculated since 03 Jan 2023)
Cumulative views and downloads (calculated since 03 Jan 2023)

Viewed (geographical distribution)

Total article views: 253 (including HTML, PDF, and XML) Thereof 253 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 28 Jan 2023
Download
Short summary
Marine viruses have been identified as key players in biogeochemical cycles and in the termination of phytoplankton bloom. In this study, we apply a coupled model system to investigate the role viruses in Baltic Sea ecosystem and how it will change with the climate change. According to our results, presence of viruses increased nutrient retention in the upper water column and reduced the transfer of organic matter to higher trophic levels. Future warming is expected to elevate these effects.
Altmetrics