Habitat Association Predicts Population Connectivity and Persistence in Flightless Beetles: A Population Genomics Approach Within a Dynamic Archipelago.

IF 4.5 1区 生物学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Molecular Ecology Pub Date : 2024-11-05 DOI:10.1111/mec.17577
Emmanouil Meramveliotakis, Joaquín Ortego, Ioannis Anastasiou, Alfried P Vogler, Anna Papadopoulou
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Abstract

Habitat association has been proposed to affect evolutionary dynamics through its control on dispersal propensity, which is considered a key trait for lineage survival in habitats of low durational stability. The Habitat Constraint hypothesis predicts different micro- and macroevolutionary patterns for stable versus dynamic habitat specialists, but the empirical evidence remains controversial and in insects mostly derives from winged lineages. We here use genome-wide SNP data to assess the effect of habitat association on the population dynamics of two closely related flightless lineages of the genus Eutagenia (Coleoptera: Tenebrionidae), which are co-distributed across the Cyclades islands in the Eastern Mediterranean but are associated with habitat types of different presumed stability: the psammophilous lineage is associated with dynamic sandy coastal habitats, while the geophilous lineage is associated with comparatively stable compact soil habitats. Our comparative population genomic and demographic analyses support higher inter-island gene flow in the psammophilous lineage, presumably due to the physical properties of dynamic sand-dune habitats that promote passive dispersal. We also find consistent bottlenecks in the psammophilous demes, suggesting that lineage evolution in the dynamic habitat is punctuated by local extinction and recolonisation events. The inferred demographic processes are surprisingly uniform among psammophilous demes, but vary considerably among geophilous demes depending on historical island connectivity, indicating more stringent constraints on the dynamic habitat lineage. This study extends the Habitat Constraint hypothesis by demonstrating that selection on dispersal traits is not the only mechanism that can drive consistent differences in evolutionary dynamics between stable versus dynamic habitat specialists.

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栖息地关联预测无翅甲虫种群的连通性和持久性:动态群岛中的种群基因组学方法
栖息地关联被认为是低持续稳定性栖息地中物种生存的关键特征,它通过控制扩散倾向影响进化动态。栖息地约束假说预测了稳定栖息地专家与动态栖息地专家不同的微观和宏观进化模式,但实证证据仍然存在争议,而且在昆虫中主要来自有翅类群。我们在本文中利用全基因组 SNP 数据评估了生境关联对 Eutagenia 属(鞘翅目:Tenebrionidae)两个密切相关的不会飞的品系种群动态的影响,这两个品系共同分布于东地中海的基克拉迪群岛,但与假定稳定性不同的生境类型相关:嗜沙品系与动态沙质沿海生境相关,而嗜地品系与相对稳定的紧密土壤生境相关。我们的种群基因组和人口比较分析表明,嗜沙系的岛屿间基因流动较高,这可能是由于动态沙丘栖息地的物理特性促进了被动扩散。我们还在嗜栉水母种群中发现了一致的瓶颈现象,这表明在动态栖息地中的种系进化会受到局部灭绝和重新定居事件的干扰。推断出的人口统计过程在嗜棘皮动物种群中惊人地一致,但在嗜地动物种群中却因历史上岛屿的连通性而有很大差异,这表明动态栖息地的世系受到了更严格的限制。这项研究扩展了 "生境限制假说",证明对扩散特征的选择并不是唯一的机制,它可以驱动稳定生境专家与动态生境专家之间进化动态的一致差异。
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来源期刊
Molecular Ecology
Molecular Ecology 生物-进化生物学
CiteScore
8.40
自引率
10.20%
发文量
472
审稿时长
1 months
期刊介绍: Molecular Ecology publishes papers that utilize molecular genetic techniques to address consequential questions in ecology, evolution, behaviour and conservation. Studies may employ neutral markers for inference about ecological and evolutionary processes or examine ecologically important genes and their products directly. We discourage papers that are primarily descriptive and are relevant only to the taxon being studied. Papers reporting on molecular marker development, molecular diagnostics, barcoding, or DNA taxonomy, or technical methods should be re-directed to our sister journal, Molecular Ecology Resources. Likewise, papers with a strongly applied focus should be submitted to Evolutionary Applications. Research areas of interest to Molecular Ecology include: * population structure and phylogeography * reproductive strategies * relatedness and kin selection * sex allocation * population genetic theory * analytical methods development * conservation genetics * speciation genetics * microbial biodiversity * evolutionary dynamics of QTLs * ecological interactions * molecular adaptation and environmental genomics * impact of genetically modified organisms
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