南极半岛西部唯一的自由生活昆虫——南极比利时虫种群的遗传历史、结构和基因流动

IF 1.5 4区 地球科学 Q3 ECOLOGY
Hilary Edgington , Vitor A.C. Pavinato , Drew Spacht , J.D. Gantz , Peter Convey , Richard E. Lee Jr. , David L. Denlinger , Andy Michel
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引用次数: 0

摘要

气候和环境的变化会影响人口和生物多样性的可持续性。了解过去和现在的种群遗传多样性可以帮助我们更好地预测物种对未来环境变化的反应。南极洲经历了剧烈的环境变化,威胁到其生物多样性。本研究对南极半岛西部特有的无翅蠓(Belgica antarctica)进行了系统地理学和种群遗传结构分析。这种昆虫具有适应极端温度、盐度、湿度、缺氧和ph的特征。比利时南极洲广泛分布在无冰栖息地的分散岛屿上,但关于其遗传历史、多样性和基因流动的问题仍然存在。我们创建了基于核的单核苷酸多态性(SNP)标记,并对来自11个种群的229个个体进行了基因分型,以检查历史和当前种群的遗传模式。我们的研究结果支持最近在过去1000万年中不同岛屿上的人口之间的分化。此外,尽管没有翅膀,B. antarctica可能通过洋流或南极脊椎动物(如海鸟)在岛屿之间频繁迁徙。南极白蚁的进化史与该地区的环境和生态之间的密切联系强调了了解其种群动态对预测其在环境变化下的持久性的重要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Genetic history, structure and gene flow among populations of Belgica antarctica, the only free-living insect in the western Antarctic Peninsula

Changes in climate and environment can impact the sustainability of populations and biodiversity. Understanding population genetic diversity in the past and present can help us better predict species' responses to future environmental change. Antarctica has experienced drastic environmental change which threatens its biodiversity. In this study, we characterized the phylogeography and population genetic structure of Belgica antarctica, a wingless midge that is endemic to the western Antarctic Peninsula. This insect has adaptive features to withstand extremes in temperature, salinity, humidity, anoxia and pH. Belgica antarctica is widespread on widely dispersed islands of ice-free habitat, but questions remain regarding its genetic history, diversity and gene flow. We created nuclear-based, single nucleotide polymorphism (SNP) markers and genotyped 229 individuals from 11 populations to examine historical and current population genetic patterns. Our results support recent divergence among populations on different islands within the last 1 Mya. Furthermore, despite a lack of wings, B. antarctica exhibited frequent migration among islands, perhaps via ocean currents or phoresy with Antarctic vertebrates (e.g. seabirds). The close link between the evolutionary history of B. antarctica and the region's environment and ecology emphasize the importance of understanding its population dynamics to predict its persistence under environmental change.

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来源期刊
Polar Science
Polar Science ECOLOGY-GEOSCIENCES, MULTIDISCIPLINARY
CiteScore
3.90
自引率
5.60%
发文量
46
期刊介绍: Polar Science is an international, peer-reviewed quarterly journal. It is dedicated to publishing original research articles for sciences relating to the polar regions of the Earth and other planets. Polar Science aims to cover 15 disciplines which are listed below; they cover most aspects of physical sciences, geosciences and life sciences, together with engineering and social sciences. Articles should attract the interest of broad polar science communities, and not be limited to the interests of those who work under specific research subjects. Polar Science also has an Open Archive whereby published articles are made freely available from ScienceDirect after an embargo period of 24 months from the date of publication. - Space and upper atmosphere physics - Atmospheric science/climatology - Glaciology - Oceanography/sea ice studies - Geology/petrology - Solid earth geophysics/seismology - Marine Earth science - Geomorphology/Cenozoic-Quaternary geology - Meteoritics - Terrestrial biology - Marine biology - Animal ecology - Environment - Polar Engineering - Humanities and social sciences.
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