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Regime shifts in the Northern Benguela ecosystem: Challenges for management
Stockholm University, Faculty of Science, Stockholm University Baltic Sea Centre.
Number of Authors: 2
2016 (English)In: Ecological Modelling, ISSN 0304-3800, E-ISSN 1872-7026, Vol. 331, 151-159 p.Article in journal (Refereed) Published
Abstract [en]

An existing Ecopath with Ecosim model of the Northern Benguela ecosystem for 1956, previously fitted to time series for 50 years, was used to describe the impact that the different pressures (fishing and climate drivers) had on the structure of the ecosystem. Ecological network analysis indices and Integrated Trend Assessment of the input data and model outputs were used to describe the changes in this ecosystem over time. We test the hypothesis that the system has been reorganised over the course of the past 50 years, probably due to the cumulative effects of overfishing and environmental drivers such as the Benguela Nifio, showing two large changes, with a transition period between the early 1970s and the early 1980s. The ecosystem has moved into a new stable state and this reorganised system will need a large shift to change with the consequential change not necessarily being back towards the pre-existing system.

Place, publisher, year, edition, pages
2016. Vol. 331, 151-159 p.
Keyword [en]
Benguela ecosystem, Ecosystem modelling, Regime shifts, Ecopath with Ecosim, Ecological network analysis
National Category
Biological Sciences
URN: urn:nbn:se:su:diva-131907DOI: 10.1016/j.ecolmodel.2015.10.027ISI: 000376831700014OAI: diva2:947224
Available from: 2016-07-07 Created: 2016-07-04 Last updated: 2016-07-07Bibliographically approved

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Tomczak, Maciej T.
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Stockholm University Baltic Sea Centre
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