Salinity affects compositional traits of epibacterial communities on the brown macroalgaFucus vesiculosus.

Stratil, Stephanie B., Neulinger, Sven, Knecht, Henrik, Friedrichs, Anette K. and Wahl, Martin (2014) Salinity affects compositional traits of epibacterial communities on the brown macroalgaFucus vesiculosus. FEMS Microbiology Ecology, 88 (2). pp. 272-279. DOI 10.1111/1574-6941.12292.

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Abstract

Epibiotic biofilms have the potential to control major aspects of the biology and ecology of their hosts. Their composition and function may thus be essential for the health of the host. We tested the influence of salinity on the composition of epibacterial communities associated with the brown macroalga Fucus vesiculosus. Algal individuals were incubated at three salinities (5, 19, and 25) for 14days and nonliving reference substrata (stones) were included in the experiment. Subsequently, the composition of their surface-associated bacterial communities was analyzed by 454 pyrosequencing of 16S rRNA gene sequences. Redundancy analysis revealed that the composition of epiphytic and epilithic communities significantly differed and were both affected by salinity. We found that 5% of 2494 epiphytic operational taxonomic units at 97% sequence similarity were responsible for the observed shifts. Epibacterial -diversity was significantly lower at salinity 5 but did not differ between substrata. Our results indicate that salinity is an important factor in structuring alga-associated epibacterial communities with respect to composition and/or diversity. Whether direct or indirect mechanisms (via altered biotic interactions) may have been responsible for the observed shifts is discussed.

Document Type: Article
Keywords: epiphytic; epilithic; bacterial community; Baltic Sea; biofilm
Research affiliation: OceanRep > The Future Ocean - Cluster of Excellence > FO-R08
OceanRep > The Future Ocean - Cluster of Excellence
Kiel University
OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EOE-B Experimental Ecology - Benthic Ecology
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1111/1574-6941.12292
ISSN: 0168-6496
Projects: Interface Ecology, Future Ocean
Date Deposited: 05 Jun 2014 11:57
Last Modified: 16 Feb 2017 10:19
URI: http://oceanrep.geomar.de/id/eprint/24700

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