分子数据揭示了智利南部存在三种具有复杂分布模式的拉穆鲁Plocamium

IF 1.4 4区 生物学 Q3 MARINE & FRESHWATER BIOLOGY
A. Montecinos, Oscar R Huanel, M. E. Ramirez, M. Guillemin
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引用次数: 4

摘要

Plocamium Lamouroux是一个分布广泛的属,目前已知有45种。然而,仅基于形态特征的经典分类在本属中是有问题的。利用分子工具发现了隐藏的遗传物种,这些物种被错误地归类为常见和广泛分布的形态学物种(包括属型软骨鱼(Linnaeus) P.S.Dixon)。本研究的目的是评估智利南部Plocamium的物种多样性。为此,从位于41°S和54°S之间的7个种群收集的样本中测序了3个独立的分子标记。通过系统发育重建和两种独立的物种划分方法(ABGD和GMYC)对物种多样性进行了评估。每种方法的结果都是一致的,表明智利南部存在三个物种。其中一种,命名为Plocamium sp. 1,仅限于Punta Guabún,这是42°S生物地理屏障以北的唯一取样地点。另外2种Plocamium sp. 2和3在巴塔哥尼亚和火地岛同属分布。智利的三个物种形成了一个进化枝,系统发育上接近于从新西兰和澳大利亚获得的序列,并提出了在过去的越洋扩散后沿智利海岸的分化。我们提出,冰川微避难所的分化可能随后发生在南部海岸,这一假设得到了冰川极大期对种群动态的强烈影响的支持,特别是在Plocamium sp. 3中。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Molecular Data Reveal the Presence of Three Plocamium Lamouroux Species with Complex Patterns of Distribution in Southern Chile
ABSTRACT Plocamium Lamouroux is a widespread genus for which 45 species are currently recognized. However, classical taxonomy based only on morphological characters, is problematic within this genus. The use of molecular tools has uncovered cryptic genetic species, mistakenly grouped under the name of morphological species that are common and widespread (including the generitype Plocamium cartilagineum (Linnaeus) P.S.Dixon). The aim of this work was to evaluate the species diversity of Plocamium in Southern Chile. For this purpose, three independent molecular markers were sequenced in samples collected from seven populations located between 41°S and 54°S. The species diversity was evaluated using phylogenetic reconstructions and two independent methods for species delimitation (ABGD and GMYC). The outcomes of each method were congruent, suggesting the presence of three species in Southern Chile. One species, named Plocamium sp. 1, is restricted to Punta Guabún, the only locality sampled north of the biogeographic barrier of the 42°S. The other two species, Plocamium sp. 2 and 3 are distributed in sympatry in Patagonia and Tierra del Fuego. The three Chilean species form a clade phylogenetically close to sequences obtained from New Zealand and Australia and a divergence along the coasts of Chile after past transoceanic dispersal is proposed. We propose that divergence in glacial microrefugia could have subsequently happen in the southern part of the coast, this hypothesis being supported by the strong impact of glacial maxima on population dynamics, especially in Plocamium sp. 3.
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来源期刊
Cryptogamie Algologie
Cryptogamie Algologie 生物-海洋与淡水生物学
CiteScore
2.60
自引率
7.70%
发文量
11
审稿时长
>12 weeks
期刊介绍: Cryptogamie is a fast-track and peer-reviewed journal of international scope publishing in English only. It accepts original papers and review articles on the taxonomy, biology and ecology of all cryptogams. An issue of Cryptogamie may be devoted to a single topic, under the responsibility of guest editor(s). All articles published in Cryptogamie are compliant with the different nomenclatural codes. A copyright assignment will be signed by the authors before publication. Cryptogamie, Algologie accepts articles on systematics as well as ecology and evolution of any kind of algae (including Cyanobacteria).
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