Endemism, palaeoendemism and migration: the case for the ‘European endemic’, Mallomonas intermedia
Endemism, palaeoendemism and migration: the case for the ‘European endemic’, Mallomonas intermedia
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地方病、古地方病和迁徙:“欧洲地方病”、中间马洛莫单胞菌的案例
DOI:
10.1080/09670262.2018.1544377
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发表时间:
2019
影响因子:
2.4
通讯作者:
Nemcova, Yvonne
中科院分区:
文献类型:
--
作者:
Siver, Peter A.;Skogstad, Asbjørn;Nemcova, Yvonne
The Synurophyceae is a well-supported clade of ecologically important heterokont algae found largely in freshwater planktonic habitats worldwide, whose members have cell coverings consisting of species-specific siliceous scales overlapped in a highly organized manner. Many synurophytes have been described as endemic and are found only in specific regions of the world. A thriving population of the European endemic,Mallomonas intermedia, was discovered in a remote desert pond situated in the Virgin Valley, Nevada, USA and in a stratigraphic sequence from the middle Eocene fossil locality known as Horsefly in British Columbia, Canada. Both North American finds were closely compared with populations from Europe, confirming the identifications. Before these discoveries, this species was recorded from numerous waterbodies exclusively in Europe, but was lacking from hundreds of sites examined from other continents. Its presence in western North America during the warm middle Eocene confirms that historically this species had a significantly wider distribution and may be best classified as a palaeoendemic. Additional species uncovered from a second fossil locality that are closely related toM. intermediafurther support the presence of this lineage in North America during the Eocene. The living population in northern Nevada presents an enigma. Does this remote desert population represent a remnant population that has gone undetected until now, or is it a recent arrival from an unknown region by an unknown vector?
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影响因子:
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