Diatom Derived Polyunsaturated Aldehydes Do Not Structure the Planktonic Microbial Community in a Mesocosm Study

Marine Drugs

Carsten Paul³  Anna Reunamo⁴  Elin Lindehoff¹  Johanna Bergkvist²  Michaela A. Mausz³  Henrik Larsson¹  Hannes Richter³  Sten-Åke Wängberg²  Piia Leskinen⁴  Ulf Båmstedt¹ 

[1] Umeå Marine Sciences Centre, Umeå University, 91020 Hörnefors, Sweden;Department of Biological and Environmental Sciences, University of Gothenburg, SE-405 30 Göteborg, Sweden;Department for Bioorganic Analytics, Friedrich Schiller University Jena, 07743 Jena, Germany;Department of Biology, Division of Genetics and Physiology, University of Turku, FI-20014 Turku, Finland;

关键词: mesocosm;    plankton interactions;    aldehydes;    oxylipins;   

DOI  :  10.3390/md10040775

来源: mdpi

【 摘 要 】

Several marine and freshwater diatoms produce polyunsaturated aldehydes (PUA) in wound-activated processes. These metabolites are also released by intact diatom cells during algal blooms. Due to their activity in laboratory experiments, PUA are considered as potential mediators of diatom-bacteria interactions. Here, we tested the hypothesis that PUA mediate such processes in a close-to-field mesocosm experiment. Natural plankton communities enriched with Skeletonema marinoi strains that differ in their PUA production, a plankton control, and a plankton control supplemented with PUA at natural and elevated concentrations were observed. We monitored bacterial and viral abundance as well as bacterial community composition and did not observe any influence of PUA on these parameters even at elevated concentrations. We rather detected an alternation of the bacterial diversity over time and differences between the two S. marinoi strains, indicating unique dynamic bacterial communities in these algal blooms. These results suggest that factors other than PUA are of significance for interactions between diatoms and bacteria.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland.