Dispersal routes between biodiversity hotspots in Asia: the case of the mountain genus Tripterospermum (Gentianinae, Gentianaceae) and its close relatives
Dispersal routes between biodiversity hotspots in Asia: the case of the mountain genus Tripterospermum (Gentianinae, Gentianaceae) and its close relatives
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DOI：
10.1111/jbi.12617
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发表时间：
2016-03-01
影响因子：
3.9
通讯作者：
Favre, Adrien
中科院分区：
文献类型：
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作者：
Matuszak, Sabine;Muellner-Riehl, Alexandra N.;Favre, Adrien
目的对分布于青藏高原南缘和东南亚生物多样性热点地区的亚热带山地植物双蝴蝶属（Tripterospermum Blume）的地理分布进行研究。本研究揭示了这些地区之间的扩散路线。位置中国东部、中南半岛、日本、菲律宾、青藏高原东南缘（喜马拉雅山南部和横断山），台湾，Wallacea.方法利用系统发育重建方法研究双蝴蝶属的进化历史（使用ITS、atpB-rbcL和trnL-trnF的最大似然和贝叶斯推断），分子年代测定（使用具有放松的时钟模型和化石约束的BEAST），以及两种祖先区域重建方法（DEC，S-DIVA）。我们的抽样设计包括82%的现存物种的亚热带龙胆亚科（Tripterospermum，Metagentiana，Sinogentiana和Crawfurdia）为内组，Kuepferia，龙胆属和其他龙胆科属为outgroups.ResultsSubtropical Gentianinae起源于东南边缘的QTP（喜马拉雅山南部和横断山）之间的16和35万年前（马）。与冠年龄估计为2.7-8.8万年（Myr），双蝴蝶起源于QTP的东南边缘，从那里它分散到中国东部，印度支那，孙达兰，台湾，日本和Wallacea.Main conclusions对于双蝴蝶，喜马拉雅山南部和横断山作为一个来源地区的殖民东亚和东南亚。这项研究描绘了扩散路线之间的生物多样性热点邻近的QTP和那些位于Sundaland和Wallacea。山地植物似乎通过台湾的北方路线而不是通过孙达兰的更南部路线来殖民Wallacea。后一条路线先前已被记录为许多低地血统。由于双蝴蝶种生产浆果分散更经常跨越地理障碍比那些生产胶囊，我们假设，鸟类运输浆果类水果可能促进了他们的传播。
AimWe investigated the biogeography of the subtropical mountain genus Tripterospermum Blume (Gentianaceae), disjunctly distributed at the southern fringe of the Qinghai-Tibetan Plateau (QTP) and other mountain systems within the biodiversity hotspots of Southeast Asia. This study reveals dispersal routes among these areas.LocationEast China, Indochina, Japan, the Philippines, southeastern fringe of the Qinghai-Tibetan Plateau (southern Himalaya and Hengduanshan), Taiwan, Wallacea.MethodsThe evolutionary history of Tripterospermum was studied using the phylogenetic reconstructions (Maximum Likelihood and Bayesian Inference using ITS, atpB-rbcL and trnL-trnF), molecular dating (using BEAST with a relaxed clock model and fossil constraints), and two approaches of ancestral area reconstructions (DEC, S-DIVA). Our sampling design included 82% of the extant species of subtropical Gentianinae (Tripterospermum, Metagentiana, Sinogentiana and Crawfurdia) as ingroup, and Kuepferia, Gentiana and other Gentianaceae genera as outgroups.ResultsSubtropical Gentianinae originated at the southeastern fringe of the QTP (the southern Himalaya and Hengduanshan) between 16 and 35 million years ago (Ma). With a crown age estimated to be 2.7-8.8 million years (Myr), Tripterospermum originated at the southeastern fringe of the QTP, from where it dispersed to East China, Indochina, Sundaland, Taiwan, Japan and Wallacea.Main conclusionsFor Tripterospermum, the southern Himalaya and the Hengduanshan have acted as a source area for the colonization of East and Southeast Asia. This study depicts dispersal routes among the biodiversity hotspots neighbouring the QTP and those located on Sundaland and Wallacea. Mountain plants seem to have colonized Wallacea using a northern route via Taiwan rather than a more southern route via Sundaland. The latter route has previously been recorded for many lowland lineages. Because Tripterospermum species-producing berries have dispersed more often across geographical barriers than those producing capsules, we hypothesize that avian transportation of berry-like fruits might have facilitated their dispersal.