uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Phosphorus availability modifies carbon production in Coccolithus pelagicus (Haptophyta)
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
Show others and affiliations
2015 (English)In: Journal of Experimental Marine Biology and Ecology, ISSN 0022-0981, E-ISSN 1879-1697, Vol. 472, 24-31 p.Article in journal (Refereed) Published
Abstract [en]

The coccolithophore Coccolithus pelagicus (Wallich) Schiller fixes CO2 into particulate organic carbon (POC) through photosynthesis and into particulate inorganic carbon (PIC) in the form of calcite. To examine the role of phosphorus (P) availability in the production of POC and PIC, C. pelagicus subsp. braarudii (Gaarder) Geisen et al. was grown in semi-continuous cultures at three initial phosphate concentrations (P-replete, 1, and 0.5 μM [P]). Reduced P-availability (1 and 0.5 μM [P]) decreased POC production, while PIC production only decreased when phosphate concentrations became growth limiting (0.5 μM [P]). This decrease has not been observed previously in batch cultures, highlighting the inadequacy of the batch culture approach with regard to determining carbon production. The reduction in growth rate by 50% at 0.5 μM [P] was accompanied by a doubling in cell volume (and POC). PIC production was halved, resulting in a lowered PIC to POC ratio. The average number of coccoliths per cell (and PIC content) remained the same among treatments, despite the significant change in cell size. Our data suggest that POC production in C. pelagicus is more sensitive towards a moderate reduction in phosphorus availability than PIC production. Once phosphorus availability limits cell division, however, phosphorus resources are invested into POC rather than PIC production. This reduces cell density and sinking rates, indicating that coccoliths do not act as ballast for reaching deeper nutrient-rich layers under nutrient limitation.

Place, publisher, year, edition, pages
2015. Vol. 472, 24-31 p.
National Category
Biological Sciences Earth and Related Environmental Sciences
URN: urn:nbn:se:uu:diva-258720DOI: 10.1016/j.jembe.2015.06.019ISI: 000360875000003OAI: oai:DiVA.org:uu-258720DiVA: diva2:842322
Knut and Alice Wallenberg Foundation
Available from: 2015-07-18 Created: 2015-07-18 Last updated: 2015-10-08Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Šupraha, LukaHenderiks, Jorijntje
By organisation
In the same journal
Journal of Experimental Marine Biology and Ecology
Biological SciencesEarth and Related Environmental Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 402 hits
ReferencesLink to record
Permanent link

Direct link