Lobus Nikolay V, Kulikovskiy Maxim S, Maltsev Yevhen I
Laboratory of Molecular Systematics of Aquatic Plants, Timiryazev Institute of Plant Physiology, Russian Academy of Sciences (IPP RAS), Botanicheskaya St. 35, 127276 Moscow, Russia.
Biology (Basel). 2021 Oct 8;10(10):1009. doi: 10.3390/biology10101009.
Data on the elemental composition of the diatom spp. from natural phytoplankton communities of Arctic marine ecosystems are presented for the first time. Samples were collected during the 69th cruise (22 August-26 September 2017) of the R/V Akademik Mstislav Keldysh in the Kara, Laptev, and East Siberian Seas. The multi-element composition of the diatom microalgae was studied by ICP-AES and ICP-MS methods. The contents of major (Na, Mg, Al, Si, P, S, K and Ca), trace (Li, Be, B, Ti, V, Cr, Mn, Co, Ni, Cu, Zn, Ga, As, Se, Rb, Sr, Mo, Ag, Cd, Sn, Sb, Cs, Ba, Hg, Tl, Pb, Bi, Th and U) and rare earth (Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu) elements varied greatly, which was probably associated with the peculiarities of the functional state and mineral nutrition of phytoplankton in the autumn period. Biogenic silicon was the dominant component of the chemical composition of spp., averaging 19.10 ± 0.58% of dry weight (DW). Other significant macronutrients were alkaline (Na and K) and alkaline earth (Ca and Mg) metals as well as biogenic (S and P) and essential (Al and Fe) elements. Their total contents varied from 1.26 to 2.72% DW, averaging 2.07 ± 0.43% DW. The Al:Si ratio for natural assemblages of spp. of the shelf seas of the Arctic Ocean was 5.8 × 10. The total concentrations of trace and rare earth elements on average were 654.42 ± 120.07 and 4.14 ± 1.37 μg g DW, respectively. We summarize the scarce data on the average chemical composition of marine and oceanic phytoplankton and discuss the limitations and approaches of such studies. We conclude on the lack of data and the need for further targeted studies on this issue.
首次呈现了来自北极海洋生态系统自然浮游植物群落中硅藻属的元素组成数据。样本是在“阿卡德米克·米斯季斯拉夫·凯尔迪什”号科研船第69次航行（2017年8月22日至9月26日）期间，于喀拉海、拉普捷夫海和东西伯利亚海采集的。通过电感耦合等离子体原子发射光谱法（ICP - AES）和电感耦合等离子体质谱法（ICP - MS）研究了硅藻微藻的多元素组成。主要元素（钠、镁、铝、硅、磷、硫、钾和钙）、微量元素（锂、铍、硼、钛、钒、铬、锰、钴、镍、铜、锌、镓、砷、硒、铷、锶、钼、银、镉、锡、锑、铯、钡、汞、铊、铅、铋、钍和铀）以及稀土元素（钪、钇、镧、铈、镨、钕、钐、铕、钆、铽、镝、钬、铒、铥、镱和镥）的含量差异很大，这可能与秋季浮游植物功能状态和矿物质营养的特性有关。生物源硅是硅藻属化学成分的主要成分，平均占干重（DW）的19.10±0.58%。其他重要的大量营养素是碱金属（钠和钾）、碱土金属（钙和镁）以及生物源元素（硫和磷）和必需元素（铝和铁）。它们的总含量在1.26%至2.72% DW之间变化，平均为2.07±0.43% DW。北冰洋陆架海硅藻属自然组合的铝硅比为5.8×10。微量元素和稀土元素的总浓度平均分别为654.42±120.07和4.14±1.37μg g DW。我们总结了关于海洋浮游植物平均化学成分的稀少数据，并讨论了此类研究的局限性和方法。我们得出结论，缺乏相关数据，需要对此问题进行进一步的针对性研究。
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