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首页> 外文期刊>Polar biology >Tintinnid ciliates of the marine microzooplankton in Arctic Seas: a compilation and analysis of species records
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Tintinnid ciliates of the marine microzooplankton in Arctic Seas: a compilation and analysis of species records

机译：北极海洋微浮游动物的丁丁纤毛虫：物种记录的汇编和分析

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摘要

We set out to examine a postulated latitudinal trend in species richness within the Arctic Ocean. We compiled species records of tintinnid ciliates in the Arctic from the literature and added our own unpublished Chukchi Sea data to produce a database (available as an Online Resource data file) consisting of 1427 records of 89 species from 414 locations above 65A degrees N sampled from 1885 to 2015. While there was no trend of species richness throughout the Arctic, there was a significant positive relationship between species richness and the number of sites sampled in a 2A degrees band, suggesting a sampling effect. Plotting cumulative numbers of species and cumulative number of sites sampled by year, we found a linear relationship in log cumulative numbers of species and log sites sampled, and a lack of a plateau in the species accumulation trend. Species records are highly dominated by four species, accounting for 45% of the records: Acanthostomella norvegica, Parafavella denticulata, Ptychocylis obtusa and Salpingella acuminata, all of which, except S. acuminata, have long been suspected to be morphologically variable, with different morphotypes given undue species status. Pooling all reported species of Acanthostomella, Parafavella and Ptychocylis yielded little qualitative differences but considerable quantitative differences. We found large discrepancies in geographic coverage. We conclude that many zones projected to experience large changes in sea ice coverage are under-sampled. Based on the historical trend, the list of Arctic tintinnid ciliate species will likely continue to grow with new sampling, regardless of changes in the Arctic Seas.
机译：我们着手研究北冰洋内物种丰富度的一种假定的纬度趋势。我们从文献中收集了丁香纤毛虫的物种记录，并添加了我们自己未发布的楚科奇海数据，以生成一个数据库（作为在线资源数据文件），该数据库由来自65A度以上的414个地点的89种1427记录组成，这些样本来自N从1885年到2015年。尽管整个北极地区物种丰富度都没有趋势，但物种丰富度与2A度带中采样的站点数量之间存在显着的正相关关系，表明存在采样效应。通过绘制物种的累积数量和按年采样的站点的累积数量，我们发现物种的对数累积数量和采样的对数站点呈线性关系，并且物种积累趋势缺乏平稳性。物种记录主要由四个物种主导，占记录的45％：棘孢宿主菌，齿叶副产卵菌，小叶产单胞菌和致敏沙门氏菌，长期以来一直怀疑它们均在形态上是可变的，具有不同的形态型。给予不适当的物种状态。汇总所有报道的棘阿米氏菌，帕拉菲维拉氏菌和Ptychocylis菌种的定性差异不大，但数量差异较大。我们发现地理范围存在很大差异。我们得出的结论是，许多预计会经历海冰覆盖率大幅变化的区域都被采样不足。根据历史趋势，不管北极海的变化如何，随着新采样的出现，北极丁香纤毛虫种类的列表可能会继续增长。

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