Effects of alkalinity and salinity at low and high light intensity on hydrogen isotope fractionation of long-chain alkenones produced by Emiliania huxleyi
Effects of alkalinity and salinity at low and high light intensity on hydrogen isotope fractionation of long-chain alkenones produced by Emiliania huxleyi
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低光强和高光强下碱度和盐度对赫氏艾米利亚长链烯酮氢同位素分馏的影响
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
M. V. D. Meer
中科院分区：
文献类型：
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作者：
Gabriella M. Weiss;E. Pfannerstill;Stefan Schouten;J. Damsté;M. V. D. Meer
抽象。在过去的十年中，长链烯酮的氢同位素已被证明是一个很有前途的代理重建古海面盐度，由于在不同的环境条件下的盐度强烈的氢同位素分馏响应。然而，到目前为止，碱度和盐度，参数，在海洋表面的共同变化，对烯酮的氢同位素分馏的影响脱钩尚未进行评估。此外，由于已知产生烯酮的附着植物Emiliania huxleyi在强光下大量生长，因此在使用δ DC 37重建古盐度之前，必须限制盐度对这些高辐照度下氢同位素分馏的影响。海洋附着菌E. huxleyi菌株CCMP 1516的生长研究的氢同位素分馏响应盐度在高光照强度和独立评估的影响，盐度和碱度在低光照条件下。我们的研究结果表明，碱度不会显着影响氢同位素分馏的烯酮，但盐度确实有很强的影响。此外，没有观察到显着差异之间的分馏反应记录在高和低光条件下生长的烯酮的盐度。与以往的研究表明，分馏反应的盐度在文化是相似的，在不同的环境条件下，加强使用氢同位素分馏作为古盐度代理。
Abstract. Over the last decade, hydrogen isotopes of long-chain alkenones have been shown to be a promising proxy for reconstructing paleo sea surface salinity due to a strong hydrogen isotope fractionation response to salinity across different environmental conditions. However, to date, the decoupling of the effects of alkalinity and salinity, parameters that co-vary in the surface ocean, on hydrogen isotope fractionation of alkenones has not been assessed. Furthermore, as the alkenone-producing haptophyte, Emiliania huxleyi, is known to grow in large blooms under high light intensities, the effect of salinity on hydrogen isotope fractionation under these high irradiances is important to constrain before using δDC37 to reconstruct paleosalinity. Batch cultures of the marine haptophyte E. huxleyi strain CCMP 1516 were grown to investigate the hydrogen isotope fractionation response to salinity at high light intensity and independently assess the effects of salinity and alkalinity under low-light conditions. Our results suggest that alkalinity does not significantly influence hydrogen isotope fractionation of alkenones, but salinity does have a strong effect. Additionally, no significant difference was observed between the fractionation responses to salinity recorded in alkenones grown under both high- and low-light conditions. Comparison with previous studies suggests that the fractionation response to salinity in culture is similar under different environmental conditions, strengthening the use of hydrogen isotope fractionation as a paleosalinity proxy.
影响因子：
16.6
作者：
Sviben S;Gal A;Hood MA;Bertinetti L;Politi Y;Bennet M;Krishnamoorthy P;Schertel A;Wirth R;Sorrentino A;Pereiro E;Faivre D;Scheffel A
通讯作者：
Scheffel A