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首页> 外文期刊>Organic Geochemistry: A Publication of the International Association of Geochemistry and Cosmochemistry >Genomic identification of the long-chain alkenone producer in freshwater Lake Toyoni, Japan: implications for temperature reconstructions
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Genomic identification of the long-chain alkenone producer in freshwater Lake Toyoni, Japan: implications for temperature reconstructions

机译：日本淡水湖长链链烯酮生产者的基因组鉴定：温度重建的影响

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摘要

Identifying the lacustrine haptophyte species that produce long-chain alkenones (LCAs) is essential prior to down-core temperature reconstructions. Here, we investigated the identity of LCA-producing species from Lake Toyoni, Japan using 18S ribosomal DNA (rDNA) and organic geochemical analyses. The rDNA analyses identified eighteen operational taxonomic units (OTUs) of which only one fell within the haptophyte phylotype. This haptophyte belongs to the Group I phylotype, as supported by the LCA distribution found in surface and down-core sediments, and is closely related to a haptophyte found in Lake BrayaSo (Greenland). The inferred temperature using the Greenland calibration is very close to the Lake Toyoni surface temperature recorded during the spring/early summer season, when the LCA-producing haptophyte is likely to bloom. We therefore suggest that the temperature calibration from the Lake BrayaSo, Greenland is a suitable calibration for down-core temperature reconstructions at Lake Toyoni. (C) 2018 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license.
机译：鉴定产生长链烯烃（LCAS）的湖泊触觉物种在核心温度重建之前是必需的。在这里，我们调查了使用18s核糖体DNA（RDNA）和有机地球化学分析的Toyoni湖与日本湖的LCA生产物种的身份。 RDNA分析确定了十八次运营分类单位（OTUS），其中只有一个在触觉中落入触觉体内。这种触觉属于I族族型，如表面和下核沉积物中发现的LCA分布所支持，并且与布雷索湖（格陵兰）中发现的患有耳蜗密切相关。使用格陵兰校准的推断温度非常接近于春季/初季湖泊的Toyoni表面温度，当时产生LCA的抗ootoOphyte可能会绽放。因此，我们表明，格雷萨索湖的温度校准是Toyoni湖下核心温度重建的合适校准。 （c）2018提交人。由elsevier有限公司出版。这是CC下的开放式访问文件。

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