Coccolithophores do not increase particulate carbon production under nutrient limitation: A case study using Emiliania huxleyi (PML B92/11)

Langer, Gerald and Oetjen, Kerstin and Brenneis, Tina (2013) Coccolithophores do not increase particulate carbon production under nutrient limitation: A case study using Emiliania huxleyi (PML B92/11). Journal of Experimental Marine Biology and Ecology, 443. pp. 155-161. ISSN 0022-0981 DOI 10.1016/j.jembe.2013.02.040

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Abstract

Abstract The coccolithophore Emiliania huxleyi (PML B92/11) was grown in batch culture under nitrogen (N) as well as phosphorus (P) limitation. Growth rate, particulate inorganic carbon (PIC), particulate organic carbon (POC), particulate organic nitrogen (PON), and particulate organic phosphorus (POP) production were determined. While PON production decreased by 96% under N-limitation and POP production decreased by 85% under P-limitation, growth rate decreased by 31% under N- and by 26% under P-limitation. POC production increased by a factor of 1.5 under N-limitation and by a factor of 3.3 under P-limitation. PIC production increased by a factor of 1.2 under N-limitation and did not change under P-limitation. It is concluded that the decrease in PON production under N-limitation and the decrease in POP production under P-limitation represent a physiological response of the cells while the increase in particulate carbon production represents a methodological artefact. The latter conclusion is based on a direct comparison of this strain's responses to nutrient limitation in different experimental setups, i.e., batch-, semi-continuous-, and continuous cultures.

Item Type: Article
Uncontrolled Keywords: 2013AREP; IA65;
Subjects: 04 - Palaeobiology
Divisions: 04 - Palaeobiology
Journal or Publication Title: Journal of Experimental Marine Biology and Ecology
Volume: 443
Page Range: pp. 155-161
Identification Number: 10.1016/j.jembe.2013.02.040
Depositing User: Sarah Humbert
Date Deposited: 08 Jun 2013 12:44
Last Modified: 23 Jul 2013 10:06
URI: http://eprints.esc.cam.ac.uk/id/eprint/2801

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