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Schouten, Stefan; Ossebaar, Jort; Schreiber, Karolin; Kienhuis, Michiel V M; Langer, Gerald; Benthien, Albert; Bijma, Jelle (2006): Experiment: 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. PANGAEA, https://doi.org/10.1594/PANGAEA.832017, Supplement to: Schouten, S et al. (2006): 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. Biogeosciences, 3(1), 113-119, https://doi.org/10.5194/bg-3-113-2006

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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, alpha alkenones-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 alpha alkenones-H2O with temperature but a positive linear correlation was observed between alpha alkenones-H2O and salinity with ~3 change in fractionation per salinity unit and a negative correlation between alpha alkenones-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.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1SpeciesSpeciesSchouten, Stefan
2StrainStrainSchouten, Stefan
3SalinitySalSchouten, Stefan
4Temperature, waterTemp°CSchouten, Stefan
5Growth rateµ#/daySchouten, Stefan
6δ Deuterium, waterδD H2O‰ SMOWSchouten, StefanCulture water
7δ Deuterium, standard deviationδD std dev±Schouten, StefanCulture water
8δ Deuterium, Alkenone, C37δD C37‰ SMOWSchouten, Stefan
9δ Deuterium, standard deviationδD std dev±Schouten, StefanAlkenone, C37
10δ Deuterium, Alkenone, C38δD C38‰ SMOWSchouten, Stefan
11δ Deuterium, standard deviationδD std dev±Schouten, StefanAlkenone, C38
12Fractionation factorFrac FactorSchouten, Stefanbetween water and C37 alkenones
13Alkenone, unsaturation index UK'37UK'37Schouten, Stefan
Size:
247 data points

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