Journal Title
Title of Journal: Mar Biol
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Abbravation: Marine Biology
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Publisher
Springer-Verlag
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Authors: Claudia Dziallas HansPeter Grossart
Publish Date: 2012/04/05
Volume: 159, Issue: 11, Pages: 2389-2398
Abstract
Associated heterotrophic bacteria alter the microenvironment of cyanobacteria and potentially influence cyanobacterial development Therefore we studied interactions of the unicellular freshwater cyanobacterium Microcystis aeruginosa with heterotrophic bacteria The associated bacterial community was greatly driven by temperature as seen by DNA fingerprinting However the associated microbes also closely interacted with the cyanobacteria indicating changing ecological consequence of the associated bacterial community with temperature Whereas concentration of dissolved organic carbon in cyanobacterial cultures changed in a temperaturedependent manner its quality greatly varied under the same environmental conditions but with different associated bacterial communities Furthermore temperature affected quantity and quality of cellbound microcystins whereby interactions between M aeruginosa and their associated community often masked this temperature effect Both macro and microenvironment of active cyanobacterial strains were characterized by high pH and oxygen values creating a unique habitat that potentially affects microbial diversity and function For example archaea including ‘anaerobic’ methanogens contributed to the associated microbial community This implies so far uncharacterized interactions between Microcystis aeruginosa and its associated prokaryotic community which has unknown ecological consequences in a climatically changing worldWe thank Solvig Pinnow for technical assistance and Andreas Ballot and Manfred Henning for providing us a variety of M aeruginosa strains We further acknowledge Helle Ploug for scientific input and technical help with the microelectrode measurements We thank three anonymous reviewers for their very helpful suggestions and comments This study was funded by the German Science Foundation DFG GR 1540/1112
Keywords:
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- Adaptation for accuracy or for precision? Diel emergence timing of the intertidal insect Pontomyia oceana (Chironomidae)
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- The response of temperate aquatic ecosystems to global warming: novel insights from a multidisciplinary project
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