Historical biogeography of Loranthaceae (Santalales): Diversification agrees with emergence of tropical forests and radiation of songbirds
Historical biogeography of Loranthaceae (Santalales): Diversification agrees with emergence of tropical forests and radiation of songbirds
复制标题
桑寄生科（桑塔拉目）的历史生物地理学：多样化与热带森林的出现和鸣禽的辐射相一致
DOI：
10.1016/j.ympev.2018.03.010
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发表时间：
2018-07-01
影响因子：
4.1
通讯作者：
Vidal-Russell, Romina
中科院分区：
文献类型：
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作者：
Liu, Bing;Chi Toan Le;Vidal-Russell, Romina
150多年前，槲寄生和鸟类之间的共同适应引起了查尔斯·达尔文的注意，激发了大量的科学研究。本文以寄生科（Loranthaceae）为研究对象，对寄主和散布者之间的相互关系有了新的认识。Loranthaceae的系统发育分析基于核和叶绿体DNA序列数据集。采用发散时间估计、祖先区域重建和多样化率分析对历史生物地理学进行了研究。估计Loranthaceae冠群起源于古新世至始新世早期（59 Ma, 95% HPD: 53-66 Ma）的澳大拉西亚冈瓦纳地区，并在始新世气候最适宜时期（约50 Ma）由根寄生向空中寄生营养模式转变。随后，推断Loranthaceae广泛分布于澳大拉西亚和南美洲，但在非洲没有。非洲和欧洲成员来自亚洲血统。Loranthaceae的多样化爆发发生在气候最佳时期，与世界上热带森林的主导地位相吻合。这也与Loranthaceae的营养模式转换和许多鸟类科的快速辐射相对应，这是新生代长距离传播的重要因素。
Coadaptation between mistletoes and birds captured the attention of Charles Darwin over 150 years ago, stimulating considerable scientific research. Here we used Loranthaceae, a speciose and ecologically important mistletoe family, to obtain new insights into the interrelationships among its hosts and dispersers. Phylogenetic analyses of Loranthaceae were based on a dataset of nuclear and chloroplast DNA sequences. Divergence time estimation, ancestral area reconstruction, and diversification rate analyses were employed to examine historical biogeography. The crown group of Loranthaceae was estimated to originate in Australasian Gondwana during the Paleocene to early Eocene (59 Ma, 95% HPD: 53-66 Ma), and rapidly diversified, converting from root parasitic to aerial parasitic trophic mode ca. 50 Ma during the Eocene climatic optimum. Subsequently, Loranthaceae were inferred to be widespread in Australasia and South America but absent in Africa. The African and European members were derived from Asiatic lineages. The burst of diversification of Loranthaceae occurred during a climatic optimum period that coincides with the dominance of tropical forests in the world. This also corresponds to the trophic mode conversion of Loranthaceae and rapid radiation of many bird families - important agents for long-distance dispersal in the Cenozoic.