Biogeochemistry

, Volume 110, Issue 1–3, pp 303–313 | Cite as

Grazing-induced production of DMS can stabilize food-web dynamics and promote the formation of phytoplankton blooms in a multitrophic plankton model

  • Nicola D. Lewis
  • Mark N. Breckels
  • Steve D. Archer
  • Andrew Morozov
  • Jonathan W. Pitchford
  • Michael Steinke
  • Edward A. Codling
Article

Abstract

Volatile infochemicals including climatically relevant dimethylsulphide (DMS) have been suggested to play important roles in the structuring and functioning of marine food webs. Experimenting with complex natural plankton communities or several trophic levels in laboratory microcosms is challenging and, as a result, empirical data confirming the role of DMS in trophic interactions is lacking. Models are a suitable tool to provide insight into such complex interactions. Here we consider a model of the interactions between three trophic levels of plankton: phytoplankton, grazing microzooplankton and predatory mesozooplankton. We show that the inclusion of a grazing-induced DMS production term has a stabilizing effect on the system dynamics under the assumption that DMS acts as an info-chemical and increases the rate of mesozooplankton predation on grazing microzooplankton. We further demonstrate how this feedback between trophic levels can potentially lead to the formation of a phytoplankton bloom. The model provides a suitable framework for further study into the possible role of DMS in the ecology of marine food webs beyond its recognised role as a climate-cooling gas.

Keywords

Multitrophic interactions Dimethylsulphide Plankton blooms Mathematical modelling Population dynamics 

Notes

Acknowledgment

This work was funded by a grant from NERC (NE/H009485/1).

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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • Nicola D. Lewis
    • 1
    • 2
  • Mark N. Breckels
    • 2
    • 3
  • Steve D. Archer
    • 3
  • Andrew Morozov
    • 4
  • Jonathan W. Pitchford
    • 5
  • Michael Steinke
    • 2
  • Edward A. Codling
    • 1
    • 2
  1. 1.Department of Mathematical SciencesUniversity of EssexColchesterUK
  2. 2.Department of Biological SciencesUniversity of EssexColchesterUK
  3. 3.Plymouth Marine LaboratoryPlymouthUK
  4. 4.Department of MathematicsUniversity of LeicesterLeicesterUK
  5. 5.Department of MathematicsUniversity of YorkYorkUK

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