Skip Navigation

This Article
Right arrow Full Text (PDF)
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 Sundh, I.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Sundh, I.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

JOURNAL OF PLANKTON RESEARCH | VOLUME 11 | NUMBER 3 | PAGES 463-486 | 1989
© Oxford University Press

research-article

Characterization of phytoplankton extracellular products (PDOC) and their subsequent uptake by heterotrophic organisms in a mesotrophic forest lake

Ingvar Sundh

Institute of Limnology Box 557, S-751 22 Uppsala, Sweden

Received on March 29, 1988; accepted on December 9, 1988 The magnitude of phytoplankton release of photosynthetically produced dissolved organic carbon (PDOC), the size distribution and chemical nature of the released substances, and the quantity and composition of PDOC that were immediately assimilated by heterotrophic bacteria were investigated in a meso- to oligotrophic, mesohumic forest lake by means of the 14CO2 technique. The percentage extracellular release (PER) was comparatively high (up to {small tilde}40%). The bulk of the released substances was of high mol. wt (>5000 dalton), with a minor contribution from low mol. wt (<1000 dalton) compounds. Heterotrophic bacteria preferentially assimilated the high molecular weight components of PDOC, and a polysaccharide of {small tilde}6000 dalton with a very short turnover time was a key substance in the carbon flow from autotrophic phytoplankton to heterotrophic bacteria. The shortcomings of the 14CO2 method to assess phytoplankton release of PDOC is critically evaluated and discussed.


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?


This article has been cited by other articles:


Home page
 Appl. Environ. Microbiol.Home page
C. Bouteleux, S. Saby, D. Tozza, J. Cavard, V. Lahoussine, P. Hartemann, and L. Mathieu
Escherichia coli Behavior in the Presence of Organic Matter Released by Algae Exposed to Water Treatment Chemicals
Appl. Envir. Microbiol., February 1, 2005; 71(2): 734 - 740.
[Abstract] [Full Text] [PDF]


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.