The University of Southampton
University of Southampton Institutional Repository

Application of synchronisation theory to plankton patchiness

Application of synchronisation theory to plankton patchiness
Application of synchronisation theory to plankton patchiness
This study applies a metapopulation dynamics approach to modelling a distribution of plankton by representing a region of ocean as an ensemble of plankton populations interacting through the stirring and mixing effects of the flow. The methods of synchronisation theory are applied within this framework to gain insight into emergent spatial structure in biophysical simulations. The manifestation of synchronisation, including statistically stable local clustering of populations, frequency-locking or phase-locking of the entire ensemble and fully synchronised dynamics, is found to depend upon: the biological model used; the strength of mixing between populations; the number of populations or, equivalently, spatial resolution of the modelled region; the level of mismatch between and spatial arrangement of population natural frequencies; the strength of stirring of the ensemble at spatial scales larger than the grid-cell. The study therefore highlights a number of biophysical modelling parameters determining the properties of emergent spatial structure in simulations of surface ocean biological dynamics. This study shows that persistent spatial heterogeneity (patchiness) can result from what intuitively should be a homogenising influence: mixing can increase the level of disorder between the plankton populations. Furthermore, the work shows that synchronisation effects occur generically under a range of simulation scenarios, giving confidence that synchronisation theory can explain some of the spatial structure, or 'patchiness', observed in plankton distributions, and providing one possible answer as to how populations of planktonic organisms maintain coherent spatial structures under the mixing and stirring action of the oceanic flow.
Guirey, Emma Jane
714a236b-e1e5-4a2e-8882-4d3ef0fa43ee
Guirey, Emma Jane
714a236b-e1e5-4a2e-8882-4d3ef0fa43ee

Guirey, Emma Jane (2007) Application of synchronisation theory to plankton patchiness. University of Southampton, School of Ocean and Earth Science, Doctoral Thesis, 166pp.

Record type: Thesis (Doctoral)

Abstract

This study applies a metapopulation dynamics approach to modelling a distribution of plankton by representing a region of ocean as an ensemble of plankton populations interacting through the stirring and mixing effects of the flow. The methods of synchronisation theory are applied within this framework to gain insight into emergent spatial structure in biophysical simulations. The manifestation of synchronisation, including statistically stable local clustering of populations, frequency-locking or phase-locking of the entire ensemble and fully synchronised dynamics, is found to depend upon: the biological model used; the strength of mixing between populations; the number of populations or, equivalently, spatial resolution of the modelled region; the level of mismatch between and spatial arrangement of population natural frequencies; the strength of stirring of the ensemble at spatial scales larger than the grid-cell. The study therefore highlights a number of biophysical modelling parameters determining the properties of emergent spatial structure in simulations of surface ocean biological dynamics. This study shows that persistent spatial heterogeneity (patchiness) can result from what intuitively should be a homogenising influence: mixing can increase the level of disorder between the plankton populations. Furthermore, the work shows that synchronisation effects occur generically under a range of simulation scenarios, giving confidence that synchronisation theory can explain some of the spatial structure, or 'patchiness', observed in plankton distributions, and providing one possible answer as to how populations of planktonic organisms maintain coherent spatial structures under the mixing and stirring action of the oceanic flow.

Text
Guirey_2007_PhD.pdf - Other
Download (9MB)

More information

Published date: August 2007
Organisations: University of Southampton

Identifiers

Local EPrints ID: 63137
URI: http://eprints.soton.ac.uk/id/eprint/63137
PURE UUID: 72d6cdd8-d48c-412b-aba3-0f1efd6c8b0d

Catalogue record

Date deposited: 12 Sep 2008
Last modified: 13 Mar 2019 20:26

Export record

Contributors

Author: Emma Jane Guirey

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×