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首页> 外文期刊>Journal of oceanography >Degradation and dissolution of zooplanktonic organic matter and lipids in early diagenesis
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Degradation and dissolution of zooplanktonic organic matter and lipids in early diagenesis

机译：早期成岩过程中浮游动物有机质和脂质的降解和溶解

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A degradation experiment with zooplankton was carried out to investigate the diagenesis of zooplanktonic organic matter, lipids, and lipid classes. In addition, reactivities and the quantitative relation between bulk organic carbon and waxes (which are the biomarkers of zooplankton) were compared during the experiment to evaluate the possibility of estimating the contributions of zooplanktonic organic matter in organic carbon pools, such as settling particles and surface sediments, from the wax concentration. Lipids were found to be more labile than the bulk organic carbon. Major parts of the organic carbon and lipids which remained on day 120 were found in the particulate fraction, and the accumulations of stable organic carbon and lipids in the dissolved fraction were limited. Although the lipids were more labile than the bulk organic carbon in the early phase of the experiment, the degradation rate of lipids obviously decreased in the subsequent degradation period, demonstrating the presence of stable lipids in zooplankton. Whereas triglycerides readily decreased, phospholipids persisted, making a major contribution to particulate lipids throughout the experiment. Waxes and other structural lipids such as glycolipids were also stably preserved in particulate lipids, suggesting that stable lipids in particulate matter are composed of structural lipids and waxes during early diagenesis. The degradation rate of waxes showed values comparable to that of bulk organic carbon after 11?days of degradation, resulting in constant ratios of waxes/bulk organic carbon (0.8?±?0.2%, n?=?7) during the later incubation period (after 11?days). This result suggests that the ratio could prove useful in evaluating the zooplanktonic organic carbon in organic carbon pools such as surface sediments and settling particulates.
机译：进行了浮游动物降解实验，以研究浮游动物有机质，脂质和脂质类别的成岩作用。此外，在实验过程中比较了反应性和块状有机碳与蜡（浮游生物的生物标志物）之间的定量关系，以评估估计浮游有机质在有机碳库中的贡献（例如沉降颗粒和表面）的可能性。沉积物，来自蜡的浓度。发现脂质比大部分有机碳更不稳定。在颗粒级分中发现了在第120天残留的大部分有机碳和脂质，而溶解级分中稳定的有机碳和脂质的积累受到限制。尽管在实验的早期，脂质比大部分有机碳更不稳定，但是在随后的降解期中，脂质的降解率明显降低，这表明浮游动物中存在稳定的脂质。尽管甘油三酸酯容易降低，但磷脂持续存在，在整个实验过程中对颗粒脂质做出了重大贡献。蜡和其他结构脂质（例如糖脂）也稳定地保存在颗粒脂质中，这表明在早期成岩过程中，颗粒物质中的稳定脂质由结构脂质和蜡组成。降解11天后，蜡的降解速率与有机碳的降解速率相当，从而在以后的培养期间蜡/本体有机碳的比率保持恒定（0.8≤±0.2％，n≤7）。 （11天后）。该结果表明该比率可证明对评估有机碳库中的浮游动物有机碳（例如表面沉积物和沉降颗粒）有用。

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