期刊
JOURNAL OF EXPERIMENTAL MARINE BIOLOGY AND ECOLOGY
卷 443, 期 -, 页码 155-161出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jembe.2013.02.040
关键词
Batch culture; Continuous culture; Emiliania huxleyi; Nutrient limitation; Particulate inorganic carbon production; Particulate organic carbon production
资金
- European Commission [211384]
- German Federal Ministry of Education and Research (BMBF) [FKZ 03F0608]
- European Community's Seventh Framework Programme [265103]
- European Research Council (ERC) [2010-NEWLOG ADG-267931 HE]
The coccolithophore Emiliania huxieyi (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. (C) 2013 Elsevier B.V. All rights reserved.
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