Who am I — and if so, how many? Species diversity of calcareous dinophytes (Thoracosphaeraceae, Peridiniales) in the Mediterranean Sea
Who am I — and if so, how many? Species diversity of calcareous dinophytes (Thoracosphaeraceae, Peridiniales) in the Mediterranean Sea
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DOI：
10.1007/s13127-012-0109-z
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发表时间：
2012-10
影响因子：
1.6
通讯作者：
Sylvia Soehner;Carmen Zinssmeister;M. Kirsch;M. Gottschling
中科院分区：
文献类型：
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作者：
Sylvia Soehner;Carmen Zinssmeister;M. Kirsch;M. Gottschling
现存钙质恐龙植物（Thoracosphaeraceae、Dinophyceae）的多样性目前尚未完全记录。建立在多个地点收集的藻类菌株对于严格研究这些单细胞生物的分类、形态和进化是必要的。我们从地中海东部沿海地区 60 多个地点收集了沉积物和水丝样本，记录了 15 种钙质恐龙的形态。内转录间隔区（ITS）条形码识别出Scrippsiella trochoidea种复合体的许多种，它们在遗传上不同，但在总体形态上无法区分（即具有相同的活动膜和类似的多刺球状阶段的制表模式）。我们使用 ITS 核糖型网络评估了可能的最小数量的隐秘物种，表明 Scrippsiella trochoidea 物种复合体中至少存在 21 个物种。地中海钙质恐龙的物种多样性似乎高于北海等世界其他海洋地区。我们的数据强调了实地工作记录钙质恐龙和其他单细胞生命形式多样性的重要性。
The diversity of extant calcareous dinophytes (Thoracosphaeraceae, Dinophyceae) is not fully recorded at present. The establishment of algal strains collected at multiple localities is necessary for a rigorous study of taxonomy, morphology and evolution in these unicellular organisms. We collected sediment and water tow samples from more than 60 localities in coastal areas of the eastern Mediterranean Sea and documented 15 morphospecies of calcareous dinophytes. Internal transcribed spacer (ITS) barcoding identified numerous species of theScrippsiella trochoideaspecies complex that were genetically distinct, but indistinguishable in gross morphology (i.e. with the same tabulation patterns of the motile theca and similar spiny coccoid stages). We assessed a possible minimal number of cryptic species using ITS ribotype networks that indicated the existence of at least 21 species within theScrippsiella trochoideaspecies complex. Species diversity of calcareous dinophytes appears higher in the Mediterranean Sea than in other parts of the world’s oceans such as the North Sea. Our data underline the importance of field work to record the diversity of calcareous dinophytes and other unicellular life forms.