Molekulare Phylogenie und Biogeographie der Chamäleons

变色龙的分子系统发育和生物地理学

• 批准号: 108380142
• 负责人: Professor Dr. Miguel Vences
• 金额: --
• 依托单位: Zoologisches Institut
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2009
• 资助国家: 德国
• 起止时间: 2008-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/108380142?language=en
• 关键词: Molekulare; Phylogenie; und; Biogeographie; der

Chameleons are a group of lizards characterized by various unique and spectacular morphological features. They also are an appropriate model with which to decipher biogeographic questions such as the relative importance of dispersal or vicariance in the origin of the biota on landmasses in the Indian Ocean. Due to their presumed (and partly demonstrated) low vagility, chameleons can also serve to analyse biogeographic patterns and processes on small scales. For such analyses, a wellresolved and taxon-rich phylogenetic hypothesis is a basic requirement. Yet, so far the published phylogenetic studies for these organisms suffer from low resolution, especially among basal branches, and from incomplete taxon coverage. The project proposed here will carry out a multilocus molecular phylogenetic analysis of chameleons, based on DNA sequences from multiple nuclear and mitochondrial genes, with a dense taxon sampling of at least 80% of all chameleon species. The phylogeny obtained will be dated using Bayesian molecular clock methods and will be used to test competing biogeographic scenarios. In concert with available georeferenced databases of chameleon distribution, we will identify geographic hotspots of chameleon species richness, endemism, and phylogenetic diversity. These patterns will be used to reconstruct historical diversification processes of chameleons, and to infer geographic priorities for nature conservation.

变色龙是一组蜥蜴，其特征是各种独特和壮观的形态特征。它们也是一个适当的模型，它旨在破译生物地理问题，例如在生物群岛起源于印度洋的陆地的起源中分散或植物学的相对重要性。由于其假定的（并部分证明）的含糊不清，因此还可以用于分析小尺度上的生物地理模式和过程。对于此类分析，良好的且富含分类群的系统发育假设是基本要求。然而，到目前为止，针对这些生物的已发表的系统发育研究遭受了低分辨率，尤其是在基础分支中，并且遭受了不完整的分类单元覆盖范围。此处提出的项目将基于来自多个核和线粒体基因的DNA序列进行变色龙的多焦分子系统发育分析，其密集的分类单元采样至少为所有变色龙物种。获得的系统发育将使用贝叶斯分子时钟方法进行日期，并将用于测试竞争的生物地理方案。与Chameleon分布的可用地理参考数据库一致，我们将确定变色龙物种丰富度，特有性和系统发育多样性的地理热点。这些模式将用于重建变色龙的历史多元化过程，并推断自然保护的地理优先事项。

项目成果

Rivaling the World's Smallest Reptiles: Discovery of Miniaturized and Microendemic New Species of Leaf Chameleons (Brookesia) from Northern Madagascar

• DOI: 10.1371/journal.pone.0031314
• 发表时间: 2012-02-14
• 期刊: PLOS ONE
• 影响因子: 3.7
• 作者: Glaw, Frank;Koehler, Joern;Vences, Miguel
• 通讯作者: Vences, Miguel

Hiding deep in the trees: discovery of divergent mitochondrial lineages in Malagasy chameleons of the Calumma nasutum group

隐藏在树林深处：在马达加斯加变色龙中发现不同的线粒体谱系

• DOI: 10.1002/ece3.269
• 发表时间: 2012
• 期刊: Ecology and Evolution
• 影响因子: 2.6
• 作者: Gehring;K. A. Tolley;F. S. Eckhardt;T. M. Townsend;T. Ziegler;F. Ratsoavina;F. Glaw ;M. Vences
• 通讯作者: M. Vences