Deuterium in marine organic biomarkers: toward a new tool for quantifying aquatic mixotrophy.
Deuterium in marine organic biomarkers: toward a new tool for quantifying aquatic mixotrophy.
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DOI：
10.1111/nph.18023
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发表时间：
2022-05
期刊：
影响因子：
9.4
通讯作者：
Rickaby, Rosalind E. M.
中科院分区：
文献类型：
--
作者：
Cormier, Marc-Andre;Berard, Jean-Baptiste;Bougaran, Gael;Trueman, Clive N.;Mayor, Daniel J.;Lampitt, Richard S.;Kruger, Nicholas J.;Flynn, Kevin J.;Rickaby, Rosalind E. M.
在海洋食物网的基础上，初级生产者（自养生物）和消费者（异养生物）之间的传统分离正日益被这样一种范式所取代，即混合浮游生物、具有利用噬菌（异养）营养体和光（自养）营养体获取能量的营养能力的浮游原生生物在全球广泛分布。因此，许多“浮游植物”吃，而50%的“原生浮游动物”也进行光合作用。混合营养可提高初级生产、生物量向更高营养级的转移以及生物泵将大气中的二氧化碳封存到深海的效率。虽然这一观点越来越受到关注，但科学缺乏一种工具来量化自养和异养在浮游原生生物中的相对贡献。这阻碍了我们了解它们对海洋水层生态系统内碳循环的影响。已经表明，脂质的氢（H）同位素特征对植物和细菌中相对于自养的异养是唯一敏感的。在这里，我们探讨是否也是敏感的原生生物的营养状态。对脂质生物标志物的H同位素特征的新认识表明，它提供了巨大的潜力，作为一种新的工具，用于量化在不同的海洋微生物中混合营养的流行，从而为调查的“mixoplankton”范式的影响。
The traditional separation between primary producers (autotrophs) and consumers (heterotrophs) at the base of the marine food web is being increasingly replaced by the paradigm that mixoplankton, planktonic protists with the nutritional ability to use both phago(hetero)trophy and photo(auto)trophy to access energy are widespread globally. Thus, many ‘phytoplankton’ eat, while 50% of ‘protozooplankton’ also perform photosynthesis. Mixotrophy may enhance primary production, biomass transfer to higher trophic levels and the efficiency of the biological pump to sequester atmospheric CO2 into the deep ocean. Although this view is gaining traction, science lacks a tool to quantify the relative contributions of autotrophy and heterotrophy in planktonic protists. This hinders our understanding of their impacts on carbon cycling within marine pelagic ecosystems. It has been shown that the hydrogen (H) isotopic signature of lipids is uniquely sensitive to heterotrophy relative to autotrophy in plants and bacteria. Here, we explored whether it is also sensitive to the trophic status in protists. The new understanding of H isotope signature of lipid biomarkers suggests it offers great potential as a novel tool for quantifying the prevalence of mixotrophy in diverse marine microorganisms and thus for investigating the implications of the ‘mixoplankton’ paradigm.
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DOI：
10.1098/rspb.2017.0664
发表时间：
2017-08-16
影响因子：
4.7
作者：
Leles, S. G.;Mitra, A.;Vage, S.
通讯作者：
Vage, S.
影响因子：
13.6
作者：
Gibbs SJ;Bown PR;Ward BA;Alvarez SA;Kim H;Archontikis OA;Sauterey B;Poulton AJ;Wilson J;Ridgwell A
通讯作者：
Ridgwell A
影响因子：
2.1
作者：
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通讯作者：
Burkholder, Joann M.
影响因子：
56.9
作者：
FENG, XH;EPSTEIN, S
通讯作者：
EPSTEIN, S
影响因子：
2.7
作者：
Cormier, M. -A.;Werner, R. A.;Kahmen, A.
通讯作者：
Kahmen, A.