Evolutionary divergences mirror Pleistocene paleodrainages in a rapidly-evolving complex of oasis-dwelling jumping spiders (Salticidae, Habronattus tarsalis)
Evolutionary divergences mirror Pleistocene paleodrainages in a rapidly-evolving complex of oasis-dwelling jumping spiders (Salticidae, Habronattus tarsalis)
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DOI：
10.1016/j.ympev.2019.106696
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发表时间：
2020-03-01
影响因子：
4.1
通讯作者：
Rajah-Boyer，Brendan
中科院分区：
文献类型：
--
作者：
Hedin，Marshal;Foldi，Steven;Rajah-Boyer，Brendan
我们的目的是了解的多样性历史的跳蛛在habronattus tarsalisspecies复杂，特别强调在这个系统中的历史如何可能照亮美国西部沙漠的地理模式和过程。沙漠种群H. tarsalisare现在仅限于高度不连续的绿洲样栖息地，但这些栖息地将定期更多的更新世多雨期连接。我们使用已发表的转录组数据集的宽松分子钟分析来估计分歧时间。多样化历史的地理模式进行了评估，使用原始序列捕获，RADSeq和形态数据的系统发育和聚类分析。多个复制转录组数据集的时钟分析表明，中晚更新世的分歧日期内的H。跗骨群复合体联合和串联系统发育分析表明，四个早期分歧的血统（H。mustaciata、黑腹蛛H. ophrys和H. tarsalis从拉洪坦和欧文斯流域），其余的样品分为较大的分支从莫哈韦沙漠，和西部人口从加州植物区系省的加州和下加利福尼亚北方。以沙漠人口为重点，RAD谱系与现代和/或古水系之间存在强烈的对应关系，在结构和机器学习结果中反映得更好。非度量多维尺度分析揭示了形态集群和遗传谱系之间的强烈一致性，后者是否代表以前描述的物种或H。跗关节RAD谱系。在这里，我们发现了一个系统，以独特的方式增加了我们的区域地理知识，使用多种类型的证据在一个广泛分布的陆生类群。与此同时，我们发现了快速进化的新的形态形式和分歧的遗传谱系。H. tarsaliscomplex，许多形式的微小范围大小，地理分布随着时间的推移缩小和扩大的可能性很高，以及渗入的迹象都与短暂的物种形成模型相一致。
We aimed to understand the diversification history of jumping spiders in theHabronattus tarsalisspecies complex, with particular emphasis on how history in this system might illuminate biogeographic patterns and processes in deserts of the western United States. Desert populations ofH. tarsalisare now confined to highly discontinuous oasis-like habitats, but these habitats would have been periodically more connected during multiple pluvial periods of the Pleistocene. We estimated divergence times using relaxed molecular clock analyses of published transcriptome datasets. Geographic patterns of diversification history were assessed using phylogenetic and cluster analyses of original sequence capture, RADSeq and morphological data. Clock analyses of multiple replicate transcriptome datasets suggest mid- to late-Pleistocene divergence dates within theH. tarsalisgroup complex. Coalescent and concatenated phylogenetic analyses indicate four early-diverging lineages (H. mustaciata,H. ophrys, andH. tarsalisfrom the Lahontan and Owens drainage basins), with remaining samples separated into larger clades from the Mojave desert, and western populations from the California Floristic Province of California and northern Baja California. Focusing on desert populations, there is a strong correspondence between RAD lineages and modern and/or paleodrainages, mirrored more finely in STRUCTURE and machine learning results. Non-metric multidimensional scaling analysis reveals strong congruence between morphological clusters and genetic lineages, whether the latter represent previously described species orH. tarsalisRAD lineages. Here we have uncovered a system that adds to our regional biogeographic knowledge in unique ways, using multiple types of evidence in a broadly-distributed terrestrial taxon. At the same time, we have discovered rapid evolution of both novel morphological forms and diverging genetic lineages. The hierarchical nature of variation in theH. tarsaliscomplex, the minute range sizes of many forms, the high likelihood that geographic distributions have shrunk and expanded through time, and signs of introgression all align with an ephemeral speciation model.