KNAW Repository

Plankton dynamics in an estuarine plume: a mesocosm 13C and 15N tracer study

Van den Meersche, K. and Soetaert, K.E.R. and Middelburg, J.J. (2011) Plankton dynamics in an estuarine plume: a mesocosm 13C and 15N tracer study. Marine Ecology Progress Series, 429, 29-43. ISSN 0171-8630.

[img]PDF - Published Version
Restricted to KNAW only until 17 May 2015.

329Kb

Official URL: http://dx.doi.org/10.3354/meps09097

Abstract

Flows of carbon and nitrogen in a natural phytoplankton assemblage from the plume of the Scheldt estuary were followed during and after a light-induced bloom by measuring changes in concentrations and stable isotope ratios in mesocosms after addition of 13C (as bicarbonate or glucose) and 15N (as ammonium or nitrate). Addition of 13C-bicarbonate showed a strong coupling between algal primary production and bacterial secondary production, while addition of 13C-glucose revealed bacteria as a carbon source for eukaryotes. Tracing the 13C into mesozooplankton, we identified selective grazing on algae during the phytoplankton bloom, transfer of carbon from bacteria to mesozooplankton and opportunistic feeding strategies after the bloom. Nitrogen labeling confirmed carbon labeling findings, identified bacteria rather than mesozooplankton as ammonium regenerators and allowed quantification of nitrification.

Item Type:Article
Institutes:Nederlands Instituut voor Ecologie (NIOO)
ID Code:8904
Deposited On:29 Jun 2011 02:00
Last Modified:24 Apr 2012 16:42

Repository Staff Only: item control page