Abstract
AME Aquatic Microbial Ecology Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsSpecials AME 73:163-170 (2014) - DOI: https://doi.org/10.3354/ame01707 Emiliania huxleyi population growth rate response to light and temperature: a synthesis Samuel R. Fielding* School of Environmental Sciences, 4 Brownlow Street, University of Liverpool, Liverpool L69 3GP, UK *Corresponding author: s.r.fielding@outlook.com ABSTRACT: The relationship between the maximum specific growth rate (μ, d-1) of the coccolithophore Emiliania huxleyi and photon flux density (PFD, µmol photons m-2 s-1) was quantified using a combination of quantile regression and culture experiment data from the literature (n = 1387). This relationship, used in ecosystem models incorporating E. huxleyi or coccolithophores as a functional group, is often assumed to follow a Monod function although values for the model parameters vary greatly. In this analysis, a Monod function was compared with other models to determine the model which best fit E. huxleyi growth rate data. Analysis showed that a Monod model of μ = 1.858[PFD/(23.91 + PFD)] best described E. huxleyi maximum growth rate as a function of PFD. In addition, an expression combining the Monod function (this study) and the power function relating growth rate to temperature (Fielding 2013; Limnol Oceanogr 58:663–666) was calculated: when both temperature (T, °C) and PFD are known, the resulting expression μ = (0.199 × T0.716) × [PFD/(14.2 + PFD)] predicts maximum E. huxleyi specific growth rate. Current literature models either overestimate or underestimate maximum growth rate by up to 3-fold over a wide range of PFDs. The use of the Monod function and the combined expression presented here is therefore recommended for future models incorporating the growth rate of E. huxleyi when either light or both temperature and light are known. KEY WORDS: Coccolithophore · Photon flux density · PFD · Temperature · Monod function · Quantile regression · Calcium carbonate · Literature review Full text in pdf format Supplementary material PreviousNextCite this article as: Fielding SR (2014) Emiliania huxleyi population growth rate response to light and temperature: a synthesis. Aquat Microb Ecol 73:163-170. https://doi.org/10.3354/ame01707 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in AME Vol. 73, No. 2. Online publication date: October 02, 2014 Print ISSN: 0948-3055; Online ISSN: 1616-1564 Copyright © 2014 Inter-Research.
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