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首页> 外文期刊>Diatom Research >A re-investigation of lake sediment diatoms from the Vestfold Hills, Antarctica, using an updated, fine-grained taxonomy
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A re-investigation of lake sediment diatoms from the Vestfold Hills, Antarctica, using an updated, fine-grained taxonomy

机译：从Vestfold Hills，南极洲，使用更新的细粒度分类来重新调查南极山

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The non-marine diatom flora of the Antarctic continent is currently being revised as recent work within the Maritime and Sub-Antarctic regions has unveiled a number of new endemic species. The under reporting of endemic species is partially due to the historic 'force-fitting' of Antarctic species into European names. Within East Antarctica, the Vestfold Hills are an extensively studied area known for their diversity of lakes spanning a salinity gradient, for whichDiatoms of the saline lakes of the Vestfold Hills, Antarcticaby Roberts & McMinn (1999) has a primary identification resource for over two decades. To determine if improved taxonomic resolution alters the ecological interpretation of these lakes, 30 prepared lake sediment samples first examined by Roberts & McMinn (1999) were re-analysed using an updated, fine-grained taxonomic approach. Our analyses confirmed the role of salinity and alkalinity in structuring Vestfold Hills diatom communities. Thus, the increased taxonomic resolution did not change the original ecological interpretation. However, the revised flora of the Vestfold Hills features 37 species endemic to the Antarctic Region, including members ofLuticola, SabbeaandHalamphora, among others. In total, 183 taxa across 38 genera were observed, in contrast to the 67 taxa reported in the original work. The revised flora, including a larger proportion of endemic species, may improve our understanding of the diatom community in general and has wider implications for both conservation and biodiversity estimates of Antarctica. More widely applied, these data can be incorporated into larger studies of Antarctic microbial biogeography and biodiversity.
机译：南极大陆的非海洋硅藻区系目前正在修订，因为最近在海洋和亚南极地区开展的工作揭示了一些新的特有物种。特有物种报告不足的部分原因是历史上南极物种被“强行”编入欧洲名称。在南极洲东部，Vestfold Hills是一个被广泛研究的区域，以其跨越盐度梯度的湖泊多样性而闻名，为此，Antarcticaby Roberts&McMinn（1999）在Vestfold Hills的盐湖中发现了20多年的主要鉴定资源。为了确定分类分辨率的提高是否会改变这些湖泊的生态解释，Roberts&McMinn（1999）首先检查了30个准备好的湖泊沉积物样品，并使用更新的细粒度分类方法对其进行了重新分析。我们的分析证实了盐度和碱度在构建Vestfold Hills硅藻群落中的作用。因此，增加的分类学分辨率并没有改变最初的生态学解释。然而，修订后的Vestfold Hills植物区系包含了南极地区特有的37种物种，包括Uticola、Sabbea和Halamphora等的成员。共观察到38属183个分类群，与原始工作中报告的67个分类群形成对比。修订后的植物区系，包括更大比例的特有物种，可能会提高我们对硅藻群落的总体理解，并对南极的保护和生物多样性估计产生更广泛的影响。更广泛地应用，这些数据可以被纳入南极微生物地理和生物多样性的大型研究中。

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