Impact of parameter choice on the dynamics of NPZD type ecosystem models.

Heinle, Anna and Slawig, Thomas (2013) Impact of parameter choice on the dynamics of NPZD type ecosystem models. Ecological Modelling, 267 . pp. 93-101. DOI 10.1016/j.ecolmodel.2013.07.019.

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Abstract

Marine ecosystem models of NPZD type are analyzed to identify model specific dynamics in dependence on the parameter setting used. It is shown that detecting the equilibria of a model and computing the eigenvalues of its linearizations it is possible to completely determine its dynamics. Three related model formulations are analyzed this way. Based on analytical computations for the simplest formulation, a theoretical classification of the occurrence of specific dynamics is presented. Its significance for all three model formulations is examined using numerical methods. Further, dynamical characteristics arising from the enhancemet of complexity in the model formulation are examined. Similarities and differences of the three models are pointed out. The most significant dynamical discrepancy is that the simplest model formulation shows limit cycles while this feature does not appear in the other two models. The results presented in this study show that knowing the basic dynamics of a model its valid application can be ensured.

Document Type: Article
Additional Information: Times Cited: 0 Heinle, A. Slawig, T.
Keywords: Marine ecosystem models, Parameters, Quality of solutions, Limit cycles
Research affiliation: OceanRep > The Future Ocean - Cluster of Excellence > FO-R07
OceanRep > The Future Ocean - Cluster of Excellence > FO-R05
OceanRep > The Future Ocean - Cluster of Excellence > FO-R11
Kiel University
Kiel University > Kiel Marine Science
OceanRep > The Future Ocean - Cluster of Excellence
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1016/j.ecolmodel.2013.07.019
ISSN: 0304-3800
Projects: Future Ocean
Date Deposited: 08 Jul 2014 09:20
Last Modified: 24 Sep 2019 00:11
URI: http://oceanrep.geomar.de/id/eprint/24955

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