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BG | Articles | Volume 15, issue 20
Biogeosciences, 15, 6139–6149, 2018
https://doi.org/10.5194/bg-15-6139-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Biogeosciences, 15, 6139–6149, 2018
https://doi.org/10.5194/bg-15-6139-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 18 Oct 2018

Research article | 18 Oct 2018

Latitudinal trends in stable isotope signatures and carbon-concentrating mechanisms of northeast Atlantic rhodoliths

Laurie C. Hofmann and Svenja Heesch

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Broom, J., Hart, D., Farr, T., Nelson, W., Neill, K., Harvey, A., and Woelkerling, W.: Utility of psbA and nSSU for phylogenetic reconstruction in the Corallinales based on New Zealand taxa, Mol. Phylogenet. Evol., 46, 958–973, 2008. 
Comeau, S., Carpenter, R. C., and Edmunds, P. J.: Coral reef calcifiers buffer their response to ocean acidification using both bicarbonate and carbonate, P. R. Soc. B, 280, 20122374, https://doi.org/10.1098/rspb.2012.2374, 2013. 
Cornelisen, C. D., Wing, S. R., Clark, K. L., Hamish Bowman, M., Frew, R. D., and Hurd, C. L.: Patterns in the δ13C and δ15N signature of Ulva pertusa: Interaction between physical gradients and nutrient source pools, Limnol. Oceanogr., 52, 820–832, https://doi.org/10.4319/lo.2007.52.2.0820, 2007. 
Cornwall, C. E., Revill, A. T., and Hurd, C. L.: High prevalence of diffusive uptake of CO2 by macroalgae in a temperate subtidal ecosystem., Photosynth. Res., 124, 181–190, https://doi.org/10.1007/s11120-015-0114-0, 2015. 
Cornwall, C. E., Revill, A. T., Hall-Spencer, J. M., Milazzo, M., Raven, J. A., and Hurd, C. L.: Inorganic carbon physiology underpins macroalgal responses to elevated CO2, Sci. Rep., 7, 46297, https://doi.org/10.1038/srep46297, 2017. 
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The ability of marine macroalgae to adapt to changing ocean chemistry will depend on the flexibility of their inorganic carbon uptake mechanisms across biogeographic ranges. Therefore, we investigated the plasticity of inorganic carbon uptake mechanisms in north Atlantic rhodoliths – free-living calcifying red algae that form important benthic habitats in coastal environments. We observed flexible mechanisms related to seawater DIC concentrations, indicating the potential for adaptation.
The ability of marine macroalgae to adapt to changing ocean chemistry will depend on the...
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