February 1st to 5th 2016
Olhão, Portugal
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Effects of ocean acidification on the microbiome of an invasive brown seaweed and the gutmicrobiome of a native isopod consumer.

Oral Presentation
Biological Invasions
Thursday, February 4, 2016 -
14:45 to 15:00

Serebryakova, A. 1 Aires, T. 2 Viard, F. 3 Serrão, E.A. 4 Engelen, A.H. 5

11. University of Algarve 2. University Pierre et Marie Curie
2Centre of Marine Sciences (CCMAR), University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal
3Station Biologique de Roscoff
4University of Algarve
5Centre of Marine Sciences (CCMAR), University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal

Ocean acidification significantly affects marine organisms. This is particularly true for seaweeds, which can benefit from raising CO2 through increased photosynthesis and carbon acquisition and subsequent higher growth rates. Changes in plant leaf chemistry in response to increased CO2 is expected to result in reduced nutritional quality of tissue for grazers. However, none of these organisms live in isolation, but in close association with diverse microbiota. As such changes in environmental conditions, associated with ocean acidification, may influence the abundance and composition of microbial communities and the services required by / provided for their host. In this study we investigated the effects of ocean acidification on the microbiome of the invasive brown seaweed Sargassum muticum and the gutmicrobiome of a native isopod consumer. We anticipate that as a result of ocean acidification, seaweed-associated microbial community will change, leading to further changes in the gutmicrobiome of grazers and adaptation of their digestive systems. The microbiome diversity and composition will be determined using the next generation sequencing of variable regions of the 16S rDNA, and bioinformatics analysis. This will allow better understanding of the role of microbiota in adaptation of invasive seaweeds, including the functional relationships, as well as direct and cascading effect of ocean acidification on the gutmicrobiome of mesoherbivores.
keywords: 
invasive seaweeds, ocean acidification, seaweed and grazer microbiomes

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