Does the cosmopolitan diatom Gomphonema parvulum (Kützing) Kützing have a biogeography?
Does the cosmopolitan diatom Gomphonema parvulum (Kützing) Kützing have a biogeography?
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DOI：
10.1371/journal.pone.0086885
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发表时间：
2014
期刊：
影响因子：
3.7
通讯作者：
Enke N
中科院分区：
文献类型：
--
作者：
Abarca N;Jahn R;Zimmermann J;Enke N
硅藻培养的G. parvulum物种复合体，建立了从法罗群岛，瑞典，德国，墨西哥和韩国的七个不同的网站，并进行了详细的研究。共鉴定出8个形态群，与世界性分类群G. [1] parvulum（Kützing）Kützing sensu lato：its nominal variety（var. parvulum）、G.小变种exilissimum格鲁诺和G.小珊瑚湾saprophilum Lange-Bertalot & Reichardt，G. [parvulum var.]还有四种无法辨认的形态动物连锁分析的标记18 SV 4，rbcL，和ITS的序列以及形态学数据导致在分离的四个类群的基础上，他们在墨西哥，韩国，欧洲大陆中部和北方大西洋欧洲的地理。Mantel测试表明，分子和地理距离之间的显着相关性。本文对两个分类群G. parvulum sensu stricto和G. lagenula，对G. saprophilum提升到种级和epitypes指定。新发现一种。
Diatom cultures of the G. parvulum species complex were established from seven different sites in the Faroe Islands, Sweden, Germany, Mexico and Korea, and were studied in detail. Eight morphodemes were identified which corresponded to the descriptions of the cosmopolitan taxon G. parvulum (Kützing) Kützing sensu lato: its nominate variety (var. parvulum), G. parvulum var. exilissimum Grunow and G. parvulum f. saprophilum Lange-Bertalot & Reichardt, G. [parvulum var.] lagenula Kützing plus four unidentifiable morphodemes. The concatenated analysis of the sequences of the markers 18SV4, rbcL, and ITS as well as morphological data resulted in a separation of four taxa based on their biogeography in Mexico, Korea, central Continental Europe and Northern Atlantic Europe. Mantel tests showed a significant correlation between molecular and geographical distances. The diagnoses of two taxa, G. parvulum sensu stricto, and G. lagenula, were emended, G. saprophilum elevated to species rank and epitypes designated. One species was newly described.
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