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.

变色龙是一群蜥蜴，以各种独特而壮观的形态特征为特征。它们也是破译生物地理问题的适当模型，例如在印度洋陆地上生物群起源的扩散或替代的相对重要性。由于它们假定(和部分证明)的低游荡能力，变色龙也可以用来分析小规模的生物地理模式和过程。对于这样的分析，一个解决得很好的和丰富的分类单元系统发育假说是一个基本的要求。然而，到目前为止，已发表的关于这些生物的系统发育研究存在分辨率低，特别是在基生枝上，以及分类单元覆盖不完整的问题。该项目将基于多个核基因和线粒体基因的DNA序列，对变色龙进行多位点分子系统发育分析，并对至少80%的变色龙物种进行密集的分类样本。获得的系统发育将使用贝叶斯分子时钟方法进行年代测定，并将用于测试相互竞争的生物地理情景。结合现有的变色龙分布地理参考数据库，我们将确定变色龙物种丰富度、地方性和系统发育多样性的地理热点。这些模式将被用来重建变色龙的历史多样化过程，并推断自然保护的地理优先事项。

项目成果

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

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