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Integrated trend assessment of ecosystem changes in the Limfjord (Denmark): Evidence of a recent regime shift?
Stockholm University, Faculty of Science, Stockholm University Baltic Sea Centre, Baltic Nest Institute. Technical University of Denmark, Denmark.
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2013 (English)In: Estuarine, Coastal and Shelf Science, ISSN 0272-7714, E-ISSN 1096-0015, Vol. 117, 178-187 p.Article in journal (Refereed) Published
Abstract [en]

An integrated ecosystem assessment was carried out for the Limfjord over the period from 1984 to 2008 to describe changes in ecosystem structure and potentially important drivers. The Limfjord is a eutrophic transitional Danish fjord system with the main inflow from the North Sea in the west and main outflow to the Kattegat in the east. We showed that from 1990 to 1995, the ecosystem structure shifted from dominance by demersal fish species (eelpout, whiting, flounder, plaice) to that of pelagic fish species (sprat, herring, sticklebacks), small-bodied fish species (black goby, pipefish), jellyfish, common shore crab, starfish and blue mussels. We interpret this change as a regime shift that showed a similar temporal pattern to regime shifts identified in adjacent seas. The observed changes in trophic interactions and food web reorganisation suggested a non-linear regime shift. The analyses further showed the regime shift to be driven by a combination of anthropogenic pressures and possible interplay with climatic disturbance.

Place, publisher, year, edition, pages
2013. Vol. 117, 178-187 p.
Keyword [en]
regime shift, ecosystem state, coastal waters, structural changes, management tool
National Category
Oceanography, Hydrology, Water Resources
URN: urn:nbn:se:su:diva-88669DOI: 10.1016/j.ecss.2012.11.009ISI: 000315323600017OAI: diva2:613050


Available from: 2013-03-26 Created: 2013-03-25 Last updated: 2014-10-16Bibliographically approved

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Tomczak, Maciej T.
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