由新记录支持的入侵水螅 Cordylophora caspia (Pallas, 1771) (Cnidaria, Hydrozoa)隐性物种的证据

IF 1.9 3区 生物学 Q3 EVOLUTIONARY BIOLOGY
Rayan Silva de Paula, Amanda Ferreira e Cunha, Mariana de Paula Reis, Clara Carvalho e Souza, Renato Brito de Oliveira Júnior, Newton Pimentel Ulhôa Barbosa, Antonio Valadão Cardoso, Erika Cristina Jorge, Lucília Souza Miranda
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引用次数: 0

摘要

非本地物种的入侵一直是水电站水库的一个长期问题。在巴西记录在案的物种中,刺胞动物 Cordylophora caspia 经常被误认为大型水生植物或完全被忽视,尽管有报告称其群落会阻碍工业厂房的结构和管道,从而产生高昂的维护费用。除了改变被入侵生态系统的生态平衡外,研究还表明 C. caspia 还能影响其他入侵物种(如 Limnoperna fortunei)的发生。在这项研究中,我们报告了 C. caspia 在巴西的两项新记录,这是首次出现在米纳斯吉拉斯州和戈亚斯州。我们详细描述了鱼群,并回顾了该物种在巴西水域的已知地理分布。我们首次提供了该物种在巴西的基因序列,并利用从世界不同地区获得的 C. caspia COI 序列对其进行了系统进化推断。我们的研究结果表明,主要支系在盐度方面并没有明显的生态生理学特化模式,因此淡水标本中的 C. lacustris 名称不成立。各支系的遗传分化程度较高,这支持了脐带虫属中存在多个隐居物种。最后,我们的祖先状态重建分析表明,C. caspia 推测起源于淡水,并在淡水和咸水之间独立转移。对世界不同地区种群的研究进展将对进一步了解物种划分、可能的入侵路线、经济影响和生态相互作用(包括与其他入侵物种的相互作用)非常重要。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Evidence of cryptic speciation in the invasive hydroid Cordylophora caspia (Pallas, 1771) (Cnidaria, Hydrozoa) supported by new records

Evidence of cryptic speciation in the invasive hydroid Cordylophora caspia (Pallas, 1771) (Cnidaria, Hydrozoa) supported by new records

The invasion of non-native species has been a chronic problem in reservoirs of hydroelectric plants. Among the species recorded in Brazil, the cnidarian Cordylophora caspia is often misidentified as macrophytes or completely overlooked, although reports state that the colonies obstruct structures and pipes in industrial plants, generating high maintenance costs. In addition to modifying the ecological balance of invaded ecosystems, studies indicated that C. caspia can influence the occurrence of other invasive species, such as Limnoperna fortunei. In this study, we reported two new records for C. caspia in Brazil, the first occurrence in Minas Gerais and Goiás. We described the colonies in detail and reviewed the known geographic distribution of the species in Brazilian waters. We provided the first Brazilian genetic sequences of the species, which were phylogenetically placed into a broad evolutionary inference using C. caspia COI sequences available from different regions of the world. Our results indicate that there is no clear pattern of ecophysiological specialization of main clades regarding salinity that would justify the validation of the nominal C. lacustris for freshwater specimens. High levels of genetic differentiation in the lineages support the existence of multiple cryptic species within the genus Cordylophora. Finally, our ancestral state reconstruction analysis suggested a presumed freshwater origin for C. caspia and independent shifts between fresh and brackish waters. Advances in the study of populations from different regions of the world will be important for further understanding species delimitation, possible routes of invasion, economic impacts, and ecological interactions, including with other invasive species.

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来源期刊
Organisms Diversity & Evolution
Organisms Diversity & Evolution 生物-进化生物学
CiteScore
3.60
自引率
0.00%
发文量
56
审稿时长
>12 weeks
期刊介绍: Organisms Diversity & Evolution (published by the Gesellschaft fuer Biologische Systematik, GfBS) is devoted to furthering our understanding of all aspects of organismal diversity and evolution. Papers addressing evolutionary aspects of the systematics, phylogenetics, morphology and development, taxonomy and biogeography of any group of eukaryotes, recent or fossil, are welcome. Priority is given to papers with a strong evolutionary and/or phylogenetic focus. Manuscripts presenting important methods or tools or addressing key theoretical, methodological, and philosophical principles related to the study of organismal diversity are also welcome. Species descriptions are welcome as parts of a manuscript of broader interest that strive to integrate such taxonomic information with the other areas of interest mentioned above.
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