Phenotypic plasticity of coralline algae in a High CO 2 world

• Published in: Ecology and Evolution
• Main Authors: Ragazzola, Federica, Foster, Laura C., Form, Armin U., Büscher, Janina, Hansteen, Thor H., Fietzke, Jan
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 2013
• Subjects: Ocean acidification
• Online Access: http://dx.doi.org/10.1002/ece3.723; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fece3.723; https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.723

Abstract It is important to understand how marine calcifying organisms may acclimatize to ocean acidification to assess their survival over the coming century. We cultured the cold water coralline algae, Lithothamnion glaciale, under elevated p CO 2 (408, 566, 770, and 1024 μatm) for 10 months. The results show that the cell (inter and intra) wall thickness is maintained, but there is a reduction in growth rate (linear extension) at all elevated p CO 2 . Furthermore a decrease in Mg content at the two highest CO 2 treatments was observed. Comparison between our data and that at 3 months from the same long‐term experiment shows that the acclimation differs over time since at 3 months, the samples cultured under high p CO 2 showed a reduction in the cell (inter and intra) wall thickness but a maintained growth rate. This suggests a reallocation of the energy budget between 3 and 10 months and highlights the high degree plasticity that is present. This might provide a selective advantage in future high CO 2 world.