Effects of past riverine connectivity on the population structure and species distribution of ‘Geophagus’ brasiliensis (Cichlidae) complex in a Neotropical hotspot

IF 2.8 2区生物学 Q2 ECOLOGY

Freshwater Biology Pub Date : 2024-04-28 DOI:10.1111/fwb.14254

Leandro Araujo Argolo, Ivan Pedro Azevedo Campos, Hernán López-Fernández, Henrique Batalha-Filho, Paulo Roberto Antunes de Mello Affonso

引用次数: 0

Abstract

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过去河流连通性对新热带热点地区巴西鲶（Cichlidae）种群结构和物种分布的影响

一旦鱼类与河流发生内在联系，河流捕获和古排水系统重组等历史事件就会影响鱼类的种群结构和物种分布。然而，这些事件的直接证据仍然有限。我们的目标是直接推断相邻河流流域之间的推定联系，以了解巴西'Geophagus'复合种群和物种的遗传和地理模式。为此，我们分析了巴西东北部沿海流域内和附近 35 个地点的 5 个物种的线粒体基因细胞色素 c 氧化酶亚单位 I（COI）的 174 个序列。基于单倍型网络、古排水重建、河流捕获的地质推断和分子方差分析（AMOVA），我们检验了遗传结构如何与不同时期栖息地连接的不同模式相关联。总体而言，我们发现了高水平的遗传变异，包括大多数物种在不同流域之间的共享单倍型。AMOVA表明，相邻流域之间的排水重新排列是 "G. "brasiliensis复合体遗传变异的主要驱动力。我们的研究驳斥了通过大陆架扩散的路线，而 8 条推定的河流捕获物则表明，历史上的联系使基因在流域间流动，直到最近才中断。这些结果为河流景观演变对新热带鱼类生物地理学的作用提供了新的见解。

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来源期刊

Freshwater Biology 生物-海洋与淡水生物学

CiteScore

5.90

自引率

3.70%

发文量

162

审稿时长

2 months

期刊介绍： Freshwater Biology publishes papers on all aspects of the ecology of inland waters, including rivers and lakes, ground waters, flood plains and other freshwater wetlands. We include studies of micro-organisms, algae, macrophytes, invertebrates, fish and other vertebrates, as well as those concerning whole systems and related physical and chemical aspects of the environment, provided that they have clear biological relevance. Studies may focus at any level in the ecological hierarchy from physiological ecology and animal behaviour, through population dynamics and evolutionary genetics, to community interactions, biogeography and ecosystem functioning. They may also be at any scale: from microhabitat to landscape, and continental to global. Preference is given to research, whether meta-analytical, experimental, theoretical or descriptive, highlighting causal (ecological) mechanisms from which clearly stated hypotheses are derived. Manuscripts with an experimental or conceptual flavour are particularly welcome, as are those or which integrate laboratory and field work, and studies from less well researched areas of the world. Priority is given to submissions that are likely to interest a wide range of readers. We encourage submission of papers well grounded in ecological theory that deal with issues related to the conservation and management of inland waters. Papers interpreting fundamental research in a way that makes clear its applied, strategic or socio-economic relevance are also welcome. Review articles (FRESHWATER BIOLOGY REVIEWS) and discussion papers (OPINION) are also invited: these enable authors to publish high-quality material outside the constraints of standard research papers.