Origin and global diversification patterns of tropical rain forests: inferences from a complete genus-level phylogeny of palms.
Origin and global diversification patterns of tropical rain forests: inferences from a complete genus-level phylogeny of palms.
复制标题
热带雨林的起源和全球多元化模式：从棕榈的完整属级系统发育中推断出来。
DOI：
10.1186/1741-7007-9-44
复制
发表时间：
2011-06-16
期刊：
影响因子：
5.4
通讯作者：
Baker WJ
中科院分区：
文献类型：
--
作者：
Couvreur TL;Forest F;Baker WJ
了解生物多样性是如何随着时间的推移而形成的，是生物学中的一个基本问题。尽管热带雨林代表了地球上最多样化的陆地生物群落，但对其多样化的时间、地点和机制仍然知之甚少。分子遗传学是探索这些问题的有价值的工具，但迄今为止，大多数研究只集中在最近的时间尺度上，这使其解释潜力最小化。为了提供一个长期的TRF多样化的观点，我们构建了第一个完整的属级的主要TRF限制的植物家族的历史可以追溯到白垩纪。棕榈科植物是全球热带雨林最具特色和生态意义的组成部分之一，也是研究热带雨林演化的模式类群。我们提供的证据表明，现存的棕榈树谱系的多样化始于大约1亿年前的白垩纪中期。祖先的生物群系和整个家庭的面积重建强烈支持的假设，棕榈树多样化的TRF样的环境在北方纬度。最后，我们的研究结果表明，棕榈树符合一个恒定的多样化模型（“博物馆”模型或圣诞节过程），至少直到新第三纪，没有证据表明，即使通过白垩纪/古近纪大规模灭绝事件的多样化率的任何变化。由于棕榈树被限制在TRF和假设生物群落保守随着时间的推移，我们的研究结果表明，存在一个TRF样生物群落在白垩纪中期的劳亚，最早的TRF有争议的化石证据相一致。纵观其历史，扶轮基金会的生物群系被认为是高度动态的，在范围上波动很大，但即使在气候不利的时期，它也持续存在。这可能使古老的谱系得以生存，并有助于随着时间的推移稳定积累多样性。与其他植物的研究相比，我们的研究结果表明，古老而稳定的进化过程可以追溯到白垩纪中期，至少部分地有助于今天的物种丰富度在TRF。
Understanding how biodiversity is shaped through time is a fundamental question in biology. Even though tropical rain forests (TRF) represent the most diverse terrestrial biomes on the planet, the timing, location and mechanisms of their diversification remain poorly understood. Molecular phylogenies are valuable tools for exploring these issues, but to date most studies have focused only on recent time scales, which minimises their explanatory potential. In order to provide a long-term view of TRF diversification, we constructed the first complete genus-level dated phylogeny of a largely TRF-restricted plant family with a known history dating back to the Cretaceous. Palms (Arecaceae/Palmae) are one of the most characteristic and ecologically important components of TRF worldwide, and represent a model group for the investigation of TRF evolution. We provide evidence that diversification of extant lineages of palms started during the mid-Cretaceous period about 100 million years ago. Ancestral biome and area reconstructions for the whole family strongly support the hypothesis that palms diversified in a TRF-like environment at northern latitudes. Finally, our results suggest that palms conform to a constant diversification model (the 'museum' model or Yule process), at least until the Neogene, with no evidence for any change in diversification rates even through the Cretaceous/Paleogene mass extinction event. Because palms are restricted to TRF and assuming biome conservatism over time, our results suggest the presence of a TRF-like biome in the mid-Cretaceous period of Laurasia, consistent with controversial fossil evidence of the earliest TRF. Throughout its history, the TRF biome is thought to have been highly dynamic and to have fluctuated greatly in extent, but it has persisted even during climatically unfavourable periods. This may have allowed old lineages to survive and contribute to the steady accumulation of diversity over time. In contrast to other plant studies, our results suggest that ancient and steady evolutionary processes dating back to the mid-Cretaceous period can contribute, at least in part, to present day species richness in TRF.
登录
查看更多内容
影响因子：
6.3
作者：
Asner, Gregory P.;Rudel, Thomas K.;Emerson, Ruth
通讯作者：
Emerson, Ruth
DOI：
10.1098/rstb.2004.1531
发表时间：
2004-10-29
影响因子：
6.3
作者：
Burnham, RJ;Johnson, KR
通讯作者：
Johnson, KR
影响因子：
5.4
作者：
Couvreur, Thomas L. P.;Chatrou, Lars W.;Richardson, James E.
通讯作者：
Richardson, James E.
DOI：
10.1073/pnas.080421597
发表时间：
2000-04-25
影响因子：
11.1
作者：
Bremer, K
通讯作者：
Bremer, K
影响因子：
6.4
作者：
Bjorholm, S;Svenning, JC;Balslev, H
通讯作者：
Balslev, H