Skip Navigation


JPR Advance Access originally published online on April 8, 2008
Journal of Plankton Research 2008 30(7):829-838; doi:10.1093/plankt/fbn042
This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow All Versions of this Article:
30/7/829    most recent
fbn042v1
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 Sinclair, G. A.
Right arrow Articles by Kamykowski, D.
PubMed
Right arrow Articles by Sinclair, G. A.
Right arrow Articles by Kamykowski, D.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

© The Author 2008. Published by Oxford University Press. All rights reserved. For permissions, please email: journals.permissions@oxfordjournals.org

Benthic–pelagic coupling in sediment-associated populations of Karenia brevis

Geoffrey A. Sinclair* and Daniel Kamykowski

Department of Marine, Earth and Atmospheric Sciences, North Carolina State University, 2800 Faucette Drive, Rm. 1125 Jordan Hall, Raleigh, NC, 27695-8208 USA

* CORRESPONDING AUTHOR: gasincla{at}ncsu.edu

Received on February 1, 2008; accepted on March 28, 2008


  Abstract

Nutrient delivery to populations of Karenia brevis in oligotrophic water columns in the Gulf of Mexico remains uncertain. Aggregations of K. brevis near the sediment–water interface suggest that cells derive nutrients from the sediment. Video of cells near the sediment suggest that cells either access nutrients that flux out of the sediment or migrate into the sediment pores where higher nutrient concentrations exist. Experiments tested K. brevis' ability to migrate into the sediment using chambers divided by a 100 µm mesh overlain with a thin layer of sediment. Since the diel vertical migration of K. brevis typically displays a nocturnal descent, experiments tested migration response at night in response to sub-sediment nutrient sources. The experiments suggest that while the sediment affects the progress of descending cells, migration occurs through thin layers of sediment and increases in response to elevated nutrient concentrations below the sediment. Since all cells found below the sediment had significantly higher C/N ratios than those remaining above the sediment, migration appears related to a cell's internal biochemical state. The vertical migration behavior of K. brevis may help alleviate bottom-up controls and permit populations to persist as vegetative cells near the sediment–water interface.

Corresponding editor: John Dolan


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.