BACKGROUND AND AIMS Several biogeographic models have been proposed to explain the colonization and diversification patterns of Macaronesian lineages. In this study, we calculated the diversification rates and explored what model better explains the current distribution of the 15 endemic species to the Canary Islands belonging to Helianthemum sect. Helianthemum (Cistaceae). METHODS We performed robust phylogenetic reconstructions based on genotyping-by-sequencing (GBS) data and analysed the timing, the biogeographical history and the ecological niche conservatism of this endemic Canarian clade. KEY RESULTS Our phylogenetic analyses provide strong support for the monophyly of this clade, and retrieved five lineages not currently restricted to a single island. The pristine colonization event took place in the Pleistocene (c. 1.82 Ma) via dispersal to Tenerife by a Mediterranean ancestor. CONCLUSIONS The rapid and abundant diversification (0.75-1.85 spp. Ma-1) undergone by this Canarian clade seems the result of complex inter-island dispersal events followed by allopatric speciation driven mostly by niche conservatism, i.e. inter-island dispersal towards niches featuring similar environmental conditions. Nevertheless, significant instances of ecological niche shifts have also been observed in some lineages, remarkably contributing to the overall diversification history of this clade.

中文翻译：

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利用基因分型测序数据重建加那利群岛向日葵（Cistaceae）时空多样性和生态位演化

背景和目标 已经提出了几种生物地理学模型来解释马卡罗尼西亚血统的殖民化和多样化模式。在这项研究中，我们计算了多样化率，并探索了哪种模型可以更好地解释 15 种特有物种目前在属于向日葵教派的加那利群岛的分布。向日葵（Cistaceae）。方法我们基于基因分型测序 (GBS) 数据进行了稳健的系统发育重建，并分析了这一地方性加那利进化枝的时间、生物地理历史和生态位保守性。主要结果我们的系统发育分析为该进化枝的单系提供了强有力的支持，并检索了目前不限于单个岛屿的五个谱系。原始的殖民事件发生在更新世（c. 1. 82 Ma）通过地中海祖先传播到特内里费岛。结论 这个加那利进化枝经历的快速和丰富的多样化（0.75-1.85 spp. Ma-1）似乎是复杂的岛间扩散事件的结果，随后是主要由生态位保守主义驱动的异域物种形成，即岛间向具有相似特征的生态位扩散环境条件。尽管如此，在一些谱系中也观察到了生态位变化的重要实例，这对这个进化枝的整体多样化历史做出了显着贡献。岛间向环境条件相似的生态位扩散。尽管如此，在一些谱系中也观察到了生态位变化的重要实例，这对这个进化枝的整体多样化历史做出了显着贡献。岛间向环境条件相似的生态位扩散。尽管如此，在一些谱系中也观察到了生态位变化的重要实例，这对这个进化枝的整体多样化历史做出了显着贡献。