The effect of temperature, salinity and growth rate on the stable hydrogen isotopic composition of long chain alkenones produced by Emiliania huxleyi and Gephyrocapsa oceanica
By Stefan Schouten, J. Ossebaar, K. Schreiber, M. Kienhuis, G. Langer, A. Benthien, J. Bijma. 2006
193 citations recorded by the source corpus.
Abstract. Two haptophyte algae, Emiliania huxleyi and Gephyrocapsa oceanica, were cultured at different temperatures and salinities to investigate the impact of these factors on the hydrogen isotopic composition of long chain alkenones synthesized by these algae. Results showed that alkenones synthesized by G. oceanica were on average depleted in D by 30 compared to those of E. huxleyi when grown under similar temperature and salinity conditions. The fractionation factor, αalkenones-H2O, ranged from 0.760 to 0.815 for E. huxleyi and from 0.741 to 0.788 for G. oceanica. There was no significant correlation of αalkenones-H2O with temperature but a positive linear correlation was observed between αalkenones-H2O and salinity with ~3 change in fractionation per salinity unit and a negative correlation between αalkenones-H2O and growth rate. This suggests that both salinity and growth rate can have a substantial impact on the stable hydrogen isotopic composition of long chain alkenones in natural environments.
Subfields: Atmospheric Science, Oceanography
View Paper: https://www.semanticscholar.org/paper/775005c9f0b9be9b58f0c583e8db1276391f9637
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Citations in the corpus
- Molecular Paleohydrology: Interpreting the Hydrogen-Isotopic Composition of Lipid Biomarkers from Photosynthesizing Organisms (2012, background): “A culture study by Schouten et al. (2006) on algal alkenones (Figure 3) showed a larger response of εl/w to salinity (3–4 decrease per salinity unit increase).”
- Hydrogen isotope fractionation in freshwater algae: I. Variations among lipids and species (2007, background): “Several recent studies have addressed this issue (Sessions et al., 1999; Sessions, 2006; Sauer et al., 2001; Huang et al., 2002, 2004; Sachse et al., 2004; Chikaraishi et al., 2004a,b,c, 2005; Chikaraishi, 2006; Englebrecht and Sachs, 2005; Schouten et al., 2006).”
- Hydrogen isotope fractionation in freshwater and marine algae: II. Temperature and nitrogen limited growth rate effects (2009, background): “Schouten et al. (2006) found that dD values in G. oceanica were lower by 16 26‰ at 21 C relative to 15 C, amounting to a 3‰ decrease per C (Table 4; Fig.”