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High-rank polycystine radiolarian taxa as temperature proxies in the Nordic Seas

机译:高级多胱氨酸放射虫分类单元作为北欧海域的温度代理

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摘要

We have found that species within high-rank taxa, with the exception of Actinommidae and Eucyrtidiidae, covary across environments in the Nordic Seas. One possible explanation is converging ecological requirements within taxonomic groups. Over the last decade, relative abundance data of species-level taxa have been successfully used to reconstruct environmental conditions in the Nordic Seas via the application of a suite of statistical techniques, including Imbrie-Kipp Factor Analysis. In this study, we test whether the same statistical approach, but based on high-rank groupings of the same dataset, yields similar results to using species-level data. We applied this technique both to modern samples and to Upper Pleistocene/Holocene cores. The results of this study are encouraging, as the statistical analyses for species and high-rank taxa give very similar results. The success of the method is due both to the ecological covariation within some high-rank taxa, and the dominance of one species in other taxa. Future paleotemperature studies in the Nordic Seas may reliably apply a high-rank approach, and thus substantially reduce noise due to misidentification and rare taxa.
机译:我们已经发现,在高等分类群中的物种,除了猕猴桃科和杜鹃科,都在北欧海洋中跨环境繁殖。一种可能的解释是在生物分类群内融合了生态要求。在过去的十年中,通过应用包括Imbrie-Kipp因子分析在内的一系列统计技术,已成功地使用了物种级分类单元的相对丰度数据来重建北欧海域的环境条件。在这项研究中,我们测试了是否使用相同的统计方法,但基于相同数据集的高级分组,得出的结果与使用物种级别的数据相似。我们将此技术应用于现代样品和上更新世/全新世岩心。这项研究的结果令人鼓舞,因为对物种和高级分类单元的统计分析得出的结果非常相似。该方法的成功既取决于某些高级分类单元中的生态协变,也取决于一种物种在其他分类单元中的优势。北欧海域未来的古温度研究可能会可靠地采用高阶方法,从而大大减少由于误识别和稀有分类群而引起的噪声。

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