The geography of diversification in mutualistic ants: a gene's‐eye view into the Neogene history of Sundaland rain forests
The geography of diversification in mutualistic ants: a gene's‐eye view into the Neogene history of Sundaland rain forests
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DOI：
10.1111/j.1365-294x.2007.03294.x
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发表时间：
2007-05
影响因子：
4.9
通讯作者：
Swee-Peck Quek;Stuart J. Davies;Peter S. Ashton;Peter S. Ashton;T. Itino;Naomi E. Pierce
中科院分区：
文献类型：
--
作者：
Swee-Peck Quek;Stuart J. Davies;Peter S. Ashton;Peter S. Ashton;T. Itino;Naomi E. Pierce
我们调查的地理和历史背景下的多样化，在一个复杂的互惠Crematogaster蚂蚁生活在血桐树在东南亚的赤道雨林。使用从婆罗洲，马来亚和苏门答腊岛32个地点收集的433个蚁群的线粒体DNA，我们推断分支关系，遗传多样性和种群历史的模式。我们重建了蚂蚁的多样化和人口扩张的时间框架，并确定了可能是避难所或多样化中心的地区。17个操作谱系确定，其中大部分可以区分主机的偏好和地理范围。蚂蚁第一次多样化是在16-20 Ma之间，在孙达兰的森林出现后不久，并在上新世期间实现了大部分的分类多样性。更新世人口扩张推断的几个年轻的血统。系统发育关系表明婆罗洲的摇篮和主轴多样化。分类多样性往往与山脉有关;在婆罗洲，沙巴的克罗克山脉是最大的，也集中在北方西北海岸的其他地区。马来亚和苏门答腊的谱系内遗传多样性也倾向于与山脉相吻合。在婆罗洲西北部北方以及马来亚和苏门答腊的主要山脉中，有一系列间断和有限的分布，在三对姐妹谱系中看到，进一步表明这些地区在更新世的干燥气候阶段是雨林避难所。结果进行了讨论的背景下，孙达兰的雨林的历史。
We investigate the geographical and historical context of diversification in a complex of mutualistic Crematogaster ants living in Macaranga trees in the equatorial rain forests of Southeast Asia. Using mitochondrial DNA from 433 ant colonies collected from 32 locations spanning Borneo, Malaya and Sumatra, we infer branching relationships, patterns of genetic diversity and population history. We reconstruct a time frame for the ants’ diversification and demographic expansions, and identify areas that might have been refugia or centres of diversification. Seventeen operational lineages are identified, most of which can be distinguished by host preference and geographical range. The ants first diversified 16–20 Ma, not long after the onset of the everwet forests in Sundaland, and achieved most of their taxonomic diversity during the Pliocene. Pleistocene demographic expansions are inferred for several of the younger lineages. Phylogenetic relationships suggest a Bornean cradle and major axis of diversification. Taxonomic diversity tends to be associated with mountain ranges; in Borneo, it is greatest in the Crocker Range of Sabah and concentrated also in other parts of the northern northwest coast. Within‐lineage genetic diversity in Malaya and Sumatra tends to also coincide with mountain ranges. A series of disjunct and restricted distributions spanning northern northwest Borneo and the major mountain ranges of Malaya and Sumatra, seen in three pairs of sister lineages, further suggests that these regions were rain‐forest refuges during drier climatic phases of the Pleistocene. Results are discussed in the context of the history of Sundaland's rain forests.