Phylogenomics and evolutionary history of Oreocnide (Urticaceae) shed light on recent geological and climatic events in SE Asia.
Phylogenomics and evolutionary history of Oreocnide (Urticaceae) shed light on recent geological and climatic events in SE Asia.
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DOI：
10.1016/j.ympev.2022.107555
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发表时间：
2022-06
影响因子：
4.1
通讯作者：
Zeng-Yuan Wu;R. Milne;Jie Liu;F. Slik;Yan Yu;Yahuang Luo;A. Monro;Wan-Ting Wang;Hong Wang
中科院分区：
文献类型：
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作者：
Zeng-Yuan Wu;R. Milne;Jie Liu;F. Slik;Yan Yu;Yahuang Luo;A. Monro;Wan-Ting Wang;Hong Wang
人们早就知道气候变化和地质事件会影响生物多样性，这意味着同样可以从生物学角度来看待这些问题。为了研究植物是否可以阐明这一点，以及它们如何应对那里的气候变化，我们研究了Oreocnide，一种广泛分布于东南亚的属。基于广泛的地理采样和基因组数据，我们采用了系统基因组学、分子测年、历史生物地理学和生态分析的综合方法。我们发现Oreocnide起源于东亚大陆，并在~6.06 Ma开始多样化，这可能是对当时东亚明显的地理和气候转变的反应，这意味着东南亚大陆最后一次重要的地质变化可能比之前认为的早1 Ma。随后发生了大约六次马来西亚群岛的移民事件，这表明来自大陆的移民可能是该地区生物群落聚集的一个被低估的因素。两次检测到的多样化率增加发生在 3.13 Ma 和 1.19 Ma，这强烈表明气候变化而不是地质变化可能是多样化的驱动因素，其中可能包括上新世东亚季风的增强以及更新世气候和海平面波动。分布模型表明，更新世海平面和气候波动被推断为使得岛间扩散成为可能，随后是异域分离，支撑了该属的辐射。总的来说，我们的研究基于多种证据，将植物多样化与东南亚最近的气候和地质事件联系起来。我们强调了移民在东南亚植物区系的聚集和多样化中的重要性，并强调了植物进化枝作为独立证据线在重建东南亚地区最近的气候和地质事件方面的效用。
Climate change and geological events have long been known to shape biodiversity, implying that these can likewise be viewed from a biological perspective. To study whether plants can shed light on this, and how they responded to climate change there, we examinedOreocnide, a genus widely distributed in SE Asia. Based on broad geographic sampling with genomic data, we employed an integrative approach of phylogenomics, molecular dating, historical biogeography, and ecological analyses. We found thatOreocnideoriginated in mainland East Asia and began to diversify ∼6.06 Ma, probably in response to a distinct geographic and climatic transition in East Asia at around that time, implying that the last important geological change in mainland SE Asia might be 1 Ma older than previously suggested. Around six immigration events to the islands of Malesia followed, indicating that immigration from the mainland could be an underestimated factor in the assembly of biotic communities in the region. Two detected increases of diversification rate occurred 3.13 and 1.19 Ma, which strongly implicated climatic rather than geological changes as likely drivers of diversification, with candidates being the Pliocene intensification of the East Asian monsoons, and Pleistocene climate and sea level fluctuations. Distribution modelling indicated that Pleistocene sea level and climate fluctuations were inferred to enable inter-island dispersal followed by allopatric separation, underpinning radiation in the genus. Overall, our study, based on multiple lines of evidence, linked plant diversification to the most recent climatic and geological events in SE Asia. We highlight the importance of immigration in the assembly and diversification of the SE Asian flora, and underscore the utility of plant clades, as independent lines of evidence, for reconstructing recent climatic and geological events in the SE Asian region.