Genetic diversity and connectivity of the invasive gastropod, Callinina georgiana (Caenogastropoda: Viviparidae) across a fragmented riverscape: A mitonuclear perspective

IF 2.8 2区生物学 Q2 ECOLOGY Freshwater Biology Pub Date : 2024-07-08 DOI:10.1111/fwb.14301

Wijesooriya Arachchilage Nimanthi Upeksha Abeyrathna, Andrew A. Davinack

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入侵腹足类动物 Callinina georgiana（腹足纲：Viviparidae）在支离破碎的河流景观中的遗传多样性和连通性：有丝分裂核视角

水生入侵物种是全球淡水生物多样性的重大威胁。本研究的重点是带状神秘蜗牛 Callinina georgiana，它是纽约北部阿迪朗达克地区的一种入侵物种，也是纽约五大湖流域的一个重要部分。该项目旨在利用线粒体和核标记相结合的方法，探索 C. georgiana 在其入侵范围内的遗传连接性。采样工作在拉奎特河及邻近水道进行，从分布于八个不同水体的 16 个不同种群中共采集了 229 只蜗牛。其中还包括该物种在美国南部原生地的两个种群。提取了 DNA，并扩增了线粒体 DNA 标记细胞色素 c 氧化酶 1 的 710-bp 片段和核标记组蛋白-3 的 351-bp 片段。进行了种群遗传分析，包括单倍型模式、AMOVA 和遗传多样性估计、中性检验和距离隔离检验，以评估连通性模式。结果表明，在蜗牛的入侵范围内存在中度到高度的遗传混杂，这表现在单倍型缺乏地理模式，以及多个地点之间存在低度到中度的遗传分化。人口分析与大量私有单倍型相结合，表明了历史上的种群扩张。有趣的是，从细胞色素 c 氧化酶 1 和组蛋白-3 标记不一致的单倍型模式可以看出，原生种群和入侵种群存在有丝分裂核不一致的情况。Callinina georgiana在其入侵范围内表现出高度的遗传连通性。水坝的存在并未对明显的基因流产生重大影响，这表明人类活动（如船只交通）可能是蜗牛在这一支离破碎的淡水系统中扩散的关键。这项研究为入侵淡水蜗牛的扩散和遗传结构提供了新的见解。它强调了在面对复杂的遗传多样性模式时考虑人为因素的重要性。研究结果对生物多样性保护具有重要意义，并为制定管理和遏制 C. georgiana 等水生入侵物种扩散的战略提供了依据，尤其是在人类活动频繁的地区。

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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.