Change search
ReferencesLink to record
Permanent link

Direct link
Benthic competition and population dynamics of Monoporeia affinis and Marenzelleria sp in the northern Baltic Sea
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
2014 (English)In: Estuarine, Coastal and Shelf Science, ISSN 0272-7714, E-ISSN 1096-0015, Vol. 144, 46-53 p.Article in journal (Refereed) Published
Abstract [en]

During the last two decades major changes of the benthic fauna have occurred in the northern Baltic Sea, the Gulf of Bothnia. The native amphipod, Monoporeia affinis, has shown a large-scale abundance decrease, while polychaetes, Marenzelleria spp. have invaded the system. Marenzelleria co-exist with the native fauna in the southern Baltic Sea, but in the north the pelagic production might be too low to allow co-existence. Thus, M. affinis might have been out-competed by Marenzelleria in the Gulf of Bothnia. This hypothesis was tested in a competition experiment with a high and a low fresh phytoplankton food supply. When exposed to high food supply both species showed stable or increased biomass over the four week test period. In low food supply, however, M. affinis was found to have a competitive advantage. The experimental data were also related to Baltic Sea monitoring data on primary production, sedimentation and invertebrate abundances. Data from the northern Baltic Sea show that the dominance in the benthic community by M. affinis was replaced by Marenzelleria around 2001. The amphipod decrease might be explained by a marked decrease in primary production during this period. Combining monitoring and experimental data suggests that the invasion of Marenzelleria did not cause the decrease of M. affinis in the northern Baltic Sea; it rather took advantage of the density gap that had occurred. A shift may thus have been established in the Bothnian Sea benthic community. (C) 2014 Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
2014. Vol. 144, 46-53 p.
Keyword [en]
competition, polychaete, amphipod, shift
National Category
URN: urn:nbn:se:umu:diva-91287DOI: 10.1016/j.ecss.2014.04.008ISI: 000337881400006OAI: diva2:735424
Available from: 2014-07-28 Created: 2014-07-28 Last updated: 2014-07-28Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Andersson, Agneta
By organisation
Department of Ecology and Environmental Sciences
In the same journal
Estuarine, Coastal and Shelf Science

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 86 hits
ReferencesLink to record
Permanent link

Direct link