Enhanced sampling refines the biogeography of the freshwater green alga Aegagropila linnaei (Cladophoraceae)

IF 1.5 4区 生物学 Q3 MARINE & FRESHWATER BIOLOGY Phycologia Pub Date : 2023-04-27 DOI:10.1080/00318884.2023.2201152
P. Volkova, E. V. Chemeris
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Abstract

ABSTRACT A phylogeographic approach is the only way to study the dispersal history of most algae, which are rarely preserved as fossils. However, the only freshwater alga for which this approach has been applied on a Eurasian scale is the endangered green alga Aegagropila linnaei, which is thought to be a poor disperser. Previous phylogeographic results were explained by stepwise dispersal across the Holarctic from an ancestral area in Japan, with further survival in European ice-dammed glacial lakes and extinction in continental Siberia, which lacks such refugia. To clarify the biogeography of A. linnaei in Eurasia we supplemented the published data on its ribotype (internal transcribed spacer of ribosomal DNA) distribution with data from previously unexplored East Europe, Mongolia and the Russian Far East. We have found two new ribotypes, one scattered across temperate Europe and another confined to one locality in the north-eastern Russian Far East. We also expanded the distribution of a ribotype previously reported from Scotland and continental West Europe to include East Europe, Iceland and Central Mongolia. Phylogeogeographic approach based on enhanced sampling allowed us to refine the biogeography of A. linnaei. We discuss reasons for underestimation of A. linnaei dispersal potential. A focused inventory of A. linnaei will likely reveal new localities of the species enabling a further improvement in biogeographical reconstructions. Area-wide studies of other freshwater algae in Eurasia need to be performed to test the generality of the revealed biogeographical patterns.
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加强采样完善了淡水绿藻Aeagropila linnaei(枝藻科)的生物地理学
摘要系统地理学方法是研究大多数藻类传播史的唯一方法,这些藻类很少作为化石保存。然而,唯一一种在欧亚范围内应用这种方法的淡水藻类是濒临灭绝的绿藻Aeagropila linnaei,它被认为是一种传播能力较差的藻类。先前的系统地理学结果是通过从日本的一个祖先地区逐步扩散到整个北极地区来解释的,在欧洲的冰坝冰川湖中进一步生存,在缺乏这种避难所的西伯利亚大陆灭绝。为了阐明欧亚大陆林蛙的生物地理学,我们用以前未经探索的东欧、蒙古和俄罗斯远东地区的数据补充了已发表的关于其核糖型(核糖体DNA的内部转录间隔区)分布的数据。我们发现了两种新的核糖类型,一种分布在温带欧洲,另一种仅限于俄罗斯远东东北部的一个地区。我们还将先前报道的一种核糖型在苏格兰和西欧大陆的分布范围扩大到东欧、冰岛和蒙古中部。基于增强采样的系统地理学方法使我们能够完善林蛙的生物地理学。我们讨论了低估林蛙传播潜力的原因。对林蛙的重点调查可能会揭示该物种的新位置,从而进一步改善生物地理重建。需要对欧亚大陆的其他淡水藻类进行区域性研究,以测试所揭示的生物地理模式的普遍性。
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来源期刊
Phycologia
Phycologia 生物-海洋与淡水生物学
CiteScore
3.10
自引率
18.80%
发文量
54
审稿时长
3 months
期刊介绍: Phycologia is published bimonthly by the International Phycological Society and serves as a publishing medium for information about any aspect of phycology. Membership in the Society is not necessary for publication. Submitted manuscripts cannot be previously published or submitted elsewhere. Copyright ownership of all accepted papers is held by the International Phycological Society.
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