Environmental controls on the Emiliania huxleyi calcite mass


Although ocean acidification is expected to impact (bio)calcification by decreasing the seawater carbonate ion concentration, [CO3]2-, there exists evidence of non-uniform response of marine calcifying plankton to low seawater [CO3]2-. This raises questions on the role of environmental factors other than acidification and on the complex physiological responses behind calcification. Here we investigate the synergistic effect of multiple environmental parameters, including temperature, nutrient (nitrate and phosphate) availability, and seawater carbonate chemistry on the coccolith calcite mass of the cosmopolitan coccolithophore Emiliania huxleyi, the most abundant species in the world ocean. We use a suite of surface (late Holocene) sediment samples from the South Atlantic and southwestern Indian Ocean taken from depths lying well above the modern lysocline. The coccolith calcite mass in our results presents a latitudinal distribution pattern that mimics the main oceanographic features, thereby pointing to the potential importance of phosphorus and temperature in determining coccolith mass by affecting primary calcification and possibly driving the E. huxleyi morphotype distribution. This evidence does not necessarily argue against the potentially important role of the rapidly changing seawater carbonate chemistry in the future, when unabated fossil fuel burning will likely perturb ocean chemistry beyond a critical point. Rather our study highlights the importance of evaluating the combined effect of several environmental stressors on calcifying organisms to project their physiological response(s) in a high CO2 world and improve interpretation of paleorecords.

In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne et al, 2014) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation is 2014-05-06.

Supplement to: Horigome, Mariana Tatsumi; Ziveri, Patrizia; Grelaud, Michaël; Baumann, Karl-Heinz; Marino, Gianluca; Mortyn, P G (2014): Environmental controls on the Emiliania huxleyi calcite mass. Biogeosciences, 11(8), 2295-2308

DOI https://doi.org/10.1594/PANGAEA.832340
Related Identifier https://doi.org/10.5194/bg-11-2295-2014
Related Identifier https://cran.r-project.org/package=seacarb
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.832340
Creator Horigome, Mariana Tatsumi; Ziveri, Patrizia ORCID logo; Grelaud, Michaël ORCID logo; Baumann, Karl-Heinz; Marino, Gianluca ORCID logo; Mortyn, P G ORCID logo
Publisher PANGAEA
Contributor Yang, Yan
Publication Year 2014
Funding Reference Seventh Framework Programme https://doi.org/10.13039/100011102 Crossref Funder ID 265103 https://cordis.europa.eu/project/id/265103 Mediterranean Sea Acidification in a Changing Climate
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Language English
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 3410 data points
Discipline Earth System Research
Spatial Coverage (-24.248W, -53.220S, 40.868E, 1.790N); Agulhas Current; Walvis Ridge; Cape Basin; Guinea Basin; Northern Guinea Basin; West Angola Basin; Mid Atlantic Ridge; East Brazil Basin; Brazil Basin; Angola Basin; Central South Atlantic; Southern Ocean; Agulhas Basin; South Atlantic; South Indian Ridge, South Indian Ocean; Conrad Rise; Indian-Antarctic Ridge
Temporal Coverage Begin 1989-03-13T00:00:00Z
Temporal Coverage End 2004-01-05T00:00:00Z