Skip Navigation



JPR Advance Access published online on September 8, 2005
Journal of Plankton Research, doi:10.1093/plankt/fbi067
This Article
Right arrow Full Text (PDF)
Right arrow All Versions of this Article:
27/9/923    most recent
fbi067v1
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Berglund, J.
Right arrow Articles by Andersson, A.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Berglund, J.
Right arrow Articles by Andersson, A.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

© The Author 2005. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oupjournals.org
Received July 10, 2005
Accepted September 5, 2005

Article

Relative strength of resource and predation limitation of heterotrophic nanoflagellates in a low-productive sea area

Johnny Berglund 1*, Kristina Samuelsson 2, Tomas Kull 3, Umut Müren 1, and Agneta Andersson 1

1 Marine Ecology, Department of Ecology and Environmental Science, Umeå University, SE-901 87 Umeå, Sweden; Umeå Marine Science Centre, SE-910 20 Hörnefors, Sweden
2 Marine Ecology, Department of Ecology and Environmental Science, Umeå University, SE-901 87 Umeå, Sweden; Umeå Marine Science Centre, SE-910 20 Hörnefors, Sweden; Present address: Division of Medical Microbiology, Department of Molecular and Clinical Medicine, Linköping University, SE-581 85 Linköping, Sweden
3 Department of Biology, Åbo Akademi University, Tykistökatu 6 A, FIN-20520 Turku, Finland

* To whom correspondence should be addressed.
Johnny Berglund, E-mail: johnny.berglund{at}emg.umu.se


  Abstract

The magnitude of resource and predation limitation of heterotrophic nanoflagellates (HNF) was studied in two short-term enclosure experiments performed in a low-productive sea area in the northern Baltic Sea in 2001. A cross factorial design was used to simultaneously assess the relative importance of the two factors. Resource limitation was removed by adding bacteria and predation limitation was eliminated by selective filtration. The first experiment was performed in June just after the spring bloom decline, and the second in September at the end of the productive season. Resource limitation prevailed during both experiments, contributing to 60% of the net growth increase in June and 74% in September. Removal of predators had a significant effect only in June. Evidence for simultaneous resource and predation limitation was thus found only during the post-bloom situation. The results were applied to a model on resource and predation control of HNF abundances. To evaluate seasonal differences, field data on HNF and bacteria from a whole year study were applied to the model. Except for a few occasions during spring, the model indicated prevailing resource control of HNF at two locations with slightly different productivity.

Communicating Editor: KJ Flynn
Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?




Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.