{"refrec":{"BRefID":239265,"RR":"<b>Borchard, C.; Borges, A.V.; Handel, N.; Engel, A.</b> (2011). Biogeochemical response of <i>Emiliania huxleyi</i> (PML B92/11) to elevated CO<sub>2</sub> and temperature under phosphorous limitation: a chemostat study. <i>J. Exp. Mar. Biol. Ecol. 410</i>: 61-71. <a href=\"http://dx.doi.org/10.1016/j.jembe.2011.10.004\" target=\"_blank\">dx.doi.org/10.1016/j.jembe.2011.10.004</a>","BEntID":230950,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>J. Exp. Mar. Biol. Ecol. 410</i>: 61-71. <a href=\"https://dx.doi.org/10.1016/j.jembe.2011.10.004\" target=\"_blank\">https://dx.doi.org/10.1016/j.jembe.2011.10.004</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Borchard, C.; Borges, A.V.; Handel, N.; Engel, A.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Borchard, C. <i>et al.</i>","Englishabstract":"The present study investigates the combined effect of phosphorous limitation, elevated partial pressure of CO<sub>2</sub> (<i>p</i>CO<sub>2</sub>) and temperature on a calcifying strain of <i>Emiliania huxleyi</i> (PML B92/11) by means of a fully controlled continuous culture facility. Two levels of phosphorous limitation were consecutively applied by renewal of culture media (N:P = 26) at dilution rates (<i>D</i>) of 0.3 d<sup>- 1</sup> and 0.1 d<sup>- 1</sup>. CO<sub>2</sub> and temperature conditions were 300, 550 and 900 µatm <i>p</i>CO<sub>2</sub> at 14 °C and 900 µatm <i>p</i>CO<sub>2</sub> at 18 °C. In general, the steady state cell density and particulate organic carbon (POC) production increased with <i>p</i>CO<sub>2</sub>, yielding significantly higher concentrations in cultures grown at 900 µatm <i>p</i>CO<sub>2</sub> compared to 300 and 550 µatm <i>p</i>CO<sub>2</sub>. At 900 µatm <i>p</i>CO<sub>2</sub>, elevation of temperature as expected for a greenhouse ocean, further increased cell densities and POC concentrations. In contrast to POC concentration, C-quotas (pmol C cell<sup>- 1</sup>) were similar at <i>D =</i> 0.3 d<sup>- 1</sup> in all cultures. At <i>D =</i> 0.1 d<sup>- 1</sup>, a reduction of C-quotas by up to 15% was observed in the 900 µatm <i>p</i>CO<sub>2</sub> at 18 °C culture. As a result of growth rate reduction, POC:PON:POP ratios deviated strongly from the Redfield ratio, primarily due to an increase in POC. Ratios of particulate inorganic and organic carbon (PIC:POC) ranged from 0.14 to 0.18 at <i>D =</i> 0.3 d<sup>- 1</sup>, and from 0.11 to 0.17 at <i>D =</i> 0.1 d<sup>- 1</sup>, with variations primarily induced by the changes in POC. At <i>D =</i> 0.1 d<sup>- 1</sup>, cell volume was reduced by up to 22% in cultures grown at 900 µatm <i>p</i>CO<sub>2</sub>. Our results indicate that changes in <i>p</i>CO<sub>2</sub>, temperature and phosphorus supply affect cell density, POC concentration and size of <i>E. huxleyi</i> (PML B92/11) to varying degrees, and will likely impact bloom development as well as biogeochemical cycling in a greenhouse ocean.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Biogeochemical response of <i>Emiliania huxleyi</i> (PML B92/11) to elevated CO<sub>2</sub> and temperature under phosphorous limitation: a chemostat study","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Carbonate system; Chemostat; CO2; Emiliania huxleyi; Stoichiometry;Temperature","OtherDescriptors":null,"Notes":null,"AnaPub":2011,"MonPub":null,"DateUpdate":"2015-11-06","DateCreate":"2014-06-19","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000298535600008","VABBcode":null,"OpenAcc":0,"DOI":"10.1016/j.jembe.2011.10.004"},"refs":null,"anarec":{"AnaID":239265,"PubliDate":2011,"Pagination":"61-71","XtraPublOfAnaID":null,"ISBN":null,"Volume":"410","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43229,"SerRR":"Journal of Experimental Marine Biology and Ecology. Elsevier: New York.  ISSN 0022-0981; e-ISSN 1879-1697","StandardTitleSer":"Journal of Experimental Marine Biology and Ecology","ISSN":"0022-0981","AbbrevSer":"J. Exp. Mar. Biol. 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