Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1093/plankt/fbr094
Titel (primär) Non-cooperative behaviour of bacteria prevents efficient phosphorus utilization of planktonic communities
Autor Tittel, J.; Büttner, O.; Kamjunke, N.
Quelle Journal of Plankton Research
Erscheinungsjahr 2012
Department ASAM; SEEFO; FLOEK
Band/Volume 34
Heft 2
Seite von 102
Seite bis 112
Sprache englisch
Keywords bacteria; phytoplankton; exudation; phosphorus; differential equation model
Abstract

Aquatic bacteria are considered to exhibit a paradoxical behaviour. They luxuriously consume phosphorus, the element often restricting the abundance of algae, which provide the organic substrates maintaining bacterial growth. Here, we test the hypothesis that bacteria can limit their uptake of phosphorus and increase the availability of phosphorus to algae. The physiological costs for bacteria must be compensated for by a surplus of photosynthetic exudates facilitating higher biomass production. To test the potential of such an economic behaviour, we used a new differential equation model that was parameterized by independent experiments. Model results indicate that this potential does exist. As a consequence, we conducted continuous growth chemostat experiments. Bacteria did not leave more phosphorus to, “high exudation” algae compared with algae with low release. Therefore, the hypothesis was not supported by the experiments. However, bacteria significantly increased production 1.4–1.8-fold in cultures with “high exudation” algae. This was explained by an increase in conversion of organic carbon from growth medium into bacteria biomass. Algal exudates were quantitatively negligible but could act as growth factors. The results show that biomass of algae and bacteria cannot be predicted solely by mineral nutrients and carbon as assumed by the classical theory.
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=11918
Tittel, J., Büttner, O., Kamjunke, N. (2012):
Non-cooperative behaviour of bacteria prevents efficient phosphorus utilization of planktonic communities
J. Plankton Res. 34 (2), 102 - 112 10.1093/plankt/fbr094