Articles | Volume 14, issue 6
Biogeosciences, 14, 1493–1509, 2017
https://doi.org/10.5194/bg-14-1493-2017
Biogeosciences, 14, 1493–1509, 2017
https://doi.org/10.5194/bg-14-1493-2017
Research article
24 Mar 2017
Research article | 24 Mar 2017

Physiology regulates the relationship between coccosphere geometry and growth phase in coccolithophores

Rosie M. Sheward et al.

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Cited articles

Arrigo, K. R.: Marine microorganisms and global nutrient cycles, Nature, 437, 349–355, https://doi.org/10.1038/nature04159, 2005.
Bach, L. T., Riebesell, U., Gutowska, M. A., Federwisch, L., and Schulz, K. G.: A unifying concept of coccolithophore sensitivity to changing carbonate chemistry embedded in an ecological framework, Prog. Oceanogr., 135, 125–138, https://doi.org/10.1016/j.pocean.2015.04.012, 2015.
Balch, W. M., Kilpatrick, K. A., Holligan, P. M., and Cucci, T.: Coccolith production and detachment by Emiliania huxleyi (Prymnesiophyceae), J. Phycol., 29, 566–575, https://doi.org/10.1111/j.0022-3646.1993.00566.x, 1993.
Balch, W. M., Fritz, J., and Fernandez, E.: Decoupling of calcification and photosynthesis in the coccolithophore Emiliania huxleyi under steady-state light-limited growth, Mar. Ecol. Prog. Ser., 142, 87–97, https://doi.org/10.3354/meps142087, 1996.
Baumann, K.-H.: Importance of size measurements for coccolith carbonate flux estimates, Micropaleontology, 50, 35–43, https://doi.org/10.2113/50.Suppl_1.35, 2004.
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Short summary
Our culture experiments on modern Coccolithophores find that physiology regulates shifts in the geometry of their carbonate shells (coccospheres) between growth phases. This provides a tool to access growth information in modern and past populations. Directly comparing modern species with fossil coccospheres derives a new proxy for investigating the physiology that underpins phytoplankton responses to environmental change through geological time.
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